Contains An Atom Of Hafnium, Titanium Or Zirconium (excludes Activating Composition) Patents (Class 148/247)
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Patent number: 8097093Abstract: Disclosed are methods for treating and coating a ferrous metal substrate, such as cold rolled steel, hot rolled steel, and electrogalvanized steel. These methods include contacting the ferrous metal substrate with an aqueous pretreatment composition comprising: (a) a Group IIIB and/or IVB metal compound; (b) phosphate ions; and (c) water.Type: GrantFiled: September 25, 2008Date of Patent: January 17, 2012Assignee: PPG Industries Ohio, IncInventors: Randall J. Brent, Nicephoros A. Fotinos, John F. McIntyre, David A. Raney, Richard M. Vargas
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Patent number: 8092617Abstract: Corrosion resistant coatings are formed on aluminum by contacting with aqueous solutions containing trivalent chromium ions and fluorometallate ions, the solutions being substantially free of hexavalent chromium. Trivalent chromium films formed on the aluminum surface when tested in 5% NaCl salt spray chamber showed corrosion resistance in excess of 168 hours. Trivalent chromium coated aluminum also serves as an effective base for paint primers.Type: GrantFiled: February 13, 2007Date of Patent: January 10, 2012Assignee: Henkel AG & Co. KGaAInventors: Kirk Kramer, Lisa Salet
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Patent number: 8075708Abstract: It is an object of the present invention to provide a pretreatment method for coating, which does not limit a coating method, places a less burden on the environment and can apply good chemical conversion treatment to all metals such as iron, zinc, aluminum and so on. A pretreatment method for coating comprising treating a substance to be treated by a chemical conversion coating agent to form a chemical conversion coat, wherein the chemical conversion coating agent comprises: at least one kind selected from the group consisting of zirconium, titanium and hafnium; fluorine; and at least one kind selected from the group consisting of amino group-containing silane coupling agents, hydrolysates thereof and polymers thereof.Type: GrantFiled: December 23, 2003Date of Patent: December 13, 2011Assignee: Nippon Paint Co., Ltd.Inventors: Masahiko Matsukawa, Kazuhiro Makino, Toshiaki Shimakura, Masanobu Futsuhara, Jiping Yang
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Publication number: 20110247728Abstract: Trivalent chromium conversion coatings are provided on a metal substrate wherein the trivalent chromium conversion coating has a halogen content of 1 atom % maximum.Type: ApplicationFiled: June 16, 2011Publication date: October 13, 2011Applicant: UNITED TECHNOLOGIES CORPORATIONInventors: Mark R. Jaworowski, Sarah Arsenault, James T. Beals
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Publication number: 20110214784Abstract: A metal surface treatment composition including at least one compound selected from the group consisting of a zirconium compound and a titanium compound, and an organosiloxane, which is a polycondensate of organosilane and has in a molecule thereof of at least two amino groups, in which the Degree of polycondensation of the organosiloxane is at least 40%, the content of at least one compound selected from the group consisting of the zirconium compound and the titanium compound is predetermined content, the content of the organosiloxane in the metal surface treatment composition is predetermined content, and the mass ratio of at least one element selected from the group consisting of the zirconium element and the titanium element contained in the zirconium compound and the titanium compound, respectively, to the silicon element contained in the organosiloxane is a predetermined ratio.Type: ApplicationFiled: September 7, 2010Publication date: September 8, 2011Applicants: NIPPON PAINT CO., LTD., Chemetail GmbHInventors: Toshio Inbe, Thomas Kolberg
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Publication number: 20110198000Abstract: A method for treating or pre-treating parts, profiled-pieces, strips, sheet metals or wires having metallic surfaces, in which at least 5% of these surfaces consists of aluminum or of at least one aluminum alloy with an acid aqueous solution which contains fluoride, zinc and phosphate and which has the following dissolved contents in the phosphatizing solution: sodium virtually none, from 0.04 to less than 2 g/L; potassium virtually none or in a concentration ranging from 0.025 to 2.5 g/L; sodium and potassium in a concentration ranging from 0.025 to 2.5 g/L as sodium, whereby the potassium content is converted to sodium on a molar basis; zinc 0.2 to 4 g/L zinc, 5 to 65 g/L calculated as PO4; 0.03 to 0.5 g/L phosphate free fluoride wherein the total fluoride is present in a concentration ranging from 0.1 to 5 g/L. A zinc-containing phosphate layer is thereby deposited onto the metallic surfaces with a layer weight ranging from 0.5 to 10 g/m2.Type: ApplicationFiled: April 6, 2011Publication date: August 18, 2011Inventors: Jürgen SPECHT, Peter Schubach, Rüdiger Rein, Peter Claude
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Publication number: 20110189401Abstract: The present invention relates to a method for improving the corrosion-protecting pre-treatment of metal surfaces and using rinse water in a manner to conserve resources in such a corrosion-protecting pre-treatment, comprising a conversion treatment step using an aqueous composition comprising at least 50 ppm of the elements B, Si, Ti, Zr and/or Hf in the form of water-soluble compounds at a pH value of 3 to 5.5, wherein a minimum fraction of 10 ppm of the elements B, Si, Ti, Zr and/or Hf in the form of water-soluble compounds is present in the last pre-rinse step and a portion of the aqueous composition of the conversion treatment step is contained in the first post-rinse step. The resource-conserving use of the rinse water is accomplished according to the invention by way of a cascaded return of rinse water from the last rinse step to the first rinse step.Type: ApplicationFiled: January 31, 2011Publication date: August 4, 2011Applicant: Henkel AG & Co. KGaAInventors: Franz-Adolf Czika, Sophie Cornen, Jens Kroemer, Michael Frank, Nicole Teubert, Jan-Willem Brouwer
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Publication number: 20110132497Abstract: A chromium-free aqueous treatment solution for coating metal surfaces is described. The treatment solution contains fluorocomplex ions of titanium and/or zirconium and molybdate ions, vanadium ions and one or more aromatic carboxylic acids with at least one carboxyl groups and at least two further functional groups, wherein the two further functional groups are selected from the group comprising carboxyl groups, hydroxyl groups, amino groups and nitro groups.Type: ApplicationFiled: December 7, 2010Publication date: June 9, 2011Inventor: Stephanie Greber
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Publication number: 20110094630Abstract: The present invention provides a chemical conversion solution and the surface treating method for realizing high corrosion resistance and high coating adhesion of the metal surface, as well as high throwing power during electrodeposition, and generating no sludge. A chemical conversion solution comprising (A) at least one compound selected from water-soluble germanium compound, water-soluble tin compound, and water-soluble copper compound, (B) at least one compound selected from water-soluble titanium compound and water-soluble zirconium compound, (C) at least one water-soluble nitrate compound, (D) at least one compound selected from water-soluble aluminum compound and water-soluble magnesium compound, (E) at least one water-soluble zinc compound, and (F) at least one fluorine compound, and, the coating process for the metal structure.Type: ApplicationFiled: December 30, 2010Publication date: April 28, 2011Applicant: Henkel AG & Co. KGaAInventors: Masayuki Yoshida, Yasuhiko Nagashima, Ryosuke Kawagoshi
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Publication number: 20110076505Abstract: A metallic material is provided that is superior to an iron-based metallic material in all of adhesion, heat resistance, electrical conductivity, and corrosion resistance, and a method of manufacturing the metallic material is also provided. A metallic material is provided that includes an iron-based metallic material and an oxide layer formed on the surface of the iron-based metallic material. The oxide layer includes Fe and at least one kind of metal (A) selected from a group consisting of Zr, Ti, and Hf. There is also provided a method of manufacturing the metallic material.Type: ApplicationFiled: August 26, 2010Publication date: March 31, 2011Applicant: Henkel AG & Co., KGaAInventors: Hitoshi Ishii, Yasuhiko Nagashima, Ryosuke Kawagoshi
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Patent number: 7909944Abstract: A surface conditioning composition is provided in which a titanium phosphate compound can be stored in the state of a dispersion liquid for a long period of time while being stably present in the dispersion liquid, with favorable stability also in the bath, and with the composition being capable of forming a conversion coating film in a sufficient amount of the film even in the case of application to conversion resistant metal materials such as high-tensile steel sheets.Type: GrantFiled: August 9, 2007Date of Patent: March 22, 2011Assignee: Chemetall GmbHInventors: Toshio Inbe, Yusuke Wada, Masahiko Matsukawa, Kotaro Kikuchi
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Publication number: 20110048584Abstract: In a process which is before a treatment process of forming a chemical conversion, TiO2 fine particles as an electron releasing-related substance (electron releasing substance) are attached onto a surface of a vehicle body. Then, a chemical conversion treatment is applied to the vehicle body having the TiO2 fine particles attached thereto. Thereby, an energy band gap of a finally-formed chemical conversion film can be smaller than that of a chemical conversion film formed by using only a chemical conversion treatment agent. Accordingly, the number of electrons (free electrons) which can be supplied onto the surface of a chemical conversion film can be increased during a voltage application in an electrodeposition coating process, and reducing reaction at a cathode can be promoted.Type: ApplicationFiled: July 19, 2010Publication date: March 3, 2011Applicant: MAZDA MOTOR CORPORATIONInventors: Daiji KATSURA, Tsutomu SHIGENAGA
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Publication number: 20110041958Abstract: An acidic chromium-free solution for treating a metal surface containing: a vanadium cation source and/or a vanadyl cation source; an organic acid as an anion source; and at least one oxoacid as another anion source is provided. The oxoacid is selected from oxoacids of nitrogen, sulfur, phosphorus, boron, and chlorine. A metal component composed of, for example, aluminum or magnesium is brought into contact with the chromium-free solution to form a vanadium coating film of a surface of the metal component. A surface treating process using this chromium-free solution is useful for formation of a coating film having low corrosion resistance and low electric resistance.Type: ApplicationFiled: October 27, 2010Publication date: February 24, 2011Applicant: Nihon Hyomen Kagaku Kabushiki KaishaInventors: Takaaki Sato, Misa Suzuki
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Publication number: 20110041957Abstract: The present invention relates to a chromium-free aqueous agent based on water-soluble compounds of titanium and/or zirconium and a source of fluoride ions, copper ions and metal ions selected from the group consisting of calcium, magnesium, aluminum, boron, zinc, iron, manganese and/or tungstene and to a method for the anti-corrosive conversion treatment of metal surfaces. The chromium-free aqueous agent is suitable for the treatment of various metal materials, joined in composite structures, amongst others of steel or galvanized steel or the alloys thereof or any combinations of said materials. Furthermore, surfaces of aluminum and alloys thereof can be treated in an anti-corrosive manner using the agent according to the invention. The anti-corrosive treatment is intended in particular as a pretreatment for a subsequent dip-coating.Type: ApplicationFiled: September 17, 2010Publication date: February 24, 2011Applicant: Henkel AG & Co. KGaAInventors: Jan-Willem Brouwer, Jens Kroemer, Sophie Cornen, Michael Frank, Nicole Teubert, Franz-Adolf Czika
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Patent number: 7879157Abstract: Described here is a method for pretreating the surfaces of weld parts of aluminum or alloys thereof, and weld parts produced with said method. Prior to welding, the weld parts are subjected to a treatment (17) in an acidic, aqueous solution, wherein the acidic, aqueous solution contains ions of the elements boron and/or silicon and/or titanium and/or zirconium and/or hafnium. The invention consists in that a polishing step (9) is carried out prior to the treatment in the acidic, aqueous solution to make for better sliding in a feed apparatus during the welding process.Type: GrantFiled: December 10, 2004Date of Patent: February 1, 2011Assignee: Newfrey LLCInventor: Frank Drexler
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Patent number: 7833332Abstract: An aqueous metal treatment composition designed to improve adhesion and corrosion resistance of the metal surface includes an organofunctional silane in combination with a fluorozirconic or fluorotitanic acid, methanesulfonic acid and nitric acid. The methanesulfonic acid acts to reduce sludge formation. Preferably, the composition also includes a fluorosilicic acid which likewise reduces sludge and improves corrosion resistance.Type: GrantFiled: November 3, 2008Date of Patent: November 16, 2010Assignee: Dubois Chemicals, Inc.Inventor: Richard Moore
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Patent number: 7829151Abstract: The invention relates to a method for modifying piece surfaces consisting in bringing pieces into contact with at least one type of a modifying agent in such a way that the modification of the surface is carried out.Type: GrantFiled: March 17, 2004Date of Patent: November 9, 2010Assignee: BEHR GmbH & Co. KGInventors: Snjezana Boger, Peter Englert, Mathias Pfitzer, Ingo Trautwein, Sabine Sedlmeir
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Patent number: 7819989Abstract: A composition for surface treatment of aluminium, aluminum alloys, magnesium or magnesium alloys and the treating solutions being diluted to the desired concentration are defined. The composition contains (1) compound A containing at least one metal element selected from the group consisting of Hf(IV), Ti(IV) and Zr(IV), (2) a fluorine-containing compound of sufficient amount to make fluorine exist in the composition in an amount of at least 5 times the molarity of the total molarity of the metal contained in the above-mentioned compound A, (3) at least one metal ion B selected from the group of alkaline earth metals, (4) at least one metal ion C selected from the group consisting of Al, Zn, Mg, Mn and Cu, and (5) nitric ion and the mol concentration of compound A is 0.1-50 mmol/L as the metal element of Hf(IV), Ti(IV) and Zr(IV). A metal treated with the treating method of the present invention solution has an excellent resistance to various corrosive environments.Type: GrantFiled: June 12, 2002Date of Patent: October 26, 2010Assignees: Nihon Parkerizing Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Kazuhiro Ishikura, Michiro Kurosawa, Takaomi Nakayama, Hiroyuki Sato, Tadashi Matsushita, Eisaku Okada, Fumiya Yoshida, Katsuhiro Shiota
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Patent number: 7815751Abstract: The invention provides a method and composition for coating a ferrous metal surface with a zirconium/vanadium conversion coating which is substantially free of an organic film forming composition and tannins. The method is a low temperature method which contemplates an aqueous conversion coating composition which is low in phosphates and which comprises zirconium, vanadium, fluoride, as well as phosphate ions in a ratio and a concentration effective for providing a conversion-coated ferrous metal surface.Type: GrantFiled: September 28, 2005Date of Patent: October 19, 2010Assignee: Coral Chemical CompanyInventors: Joseph D. Pemberton, John P. Jandrists
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Patent number: 7811391Abstract: This invention comprises an acidic aqueous solution for treating metal substrates to improve the adhesion bonding and corrosion protection of the metal surface which comprises effective amounts of water soluble trivalent chromium compounds, fluorozirconates, effective amounts of at least one corrosion inhibitors such as benzotriazole, fluorometallic compounds, zinc compounds, thickeners, surfactants, and at least about 0.001 mole per liter of the acidic solution of a polyhydroxy and/or carboxylic compound as a stabilizing agent for the aqueous solution.Type: GrantFiled: April 21, 2005Date of Patent: October 12, 2010Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig A. Matzdorf, William C. Nickerson, Jr.
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Patent number: 7811366Abstract: A metal surface treatment composition including at least one compound selected from the group consisting of a zirconium compound and a titanium compound, and an organosiloxane, which is a polycondensate of organosilane and has in a molecule thereof of at least two amino groups, in which the Degree of polycondensation of the organosiloxane is at least 40%, the content of at least one compound selected from the group consisting of the zirconium compound and the titanium compound is predetermined content, the content of the organosiloxane in the metal surface treatment composition is predetermined content, and the mass ratio of at least one element selected from the group consisting of the zirconium element and the titanium element contained in the zirconium compound and the titanium compound, respectively, to the silicon element contained in the organosiloxane is a predetermined ratio.Type: GrantFiled: March 29, 2007Date of Patent: October 12, 2010Assignees: Nippon Paint Co., Ltd., Chemetall GmbHInventors: Toshio Inbe, Thomas Kolberg
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Patent number: 7749368Abstract: Disclosed are methods for coating a metal substrate with a yttrium-containing coating, including ferrous substrates, such as cold rolled steel and electrogalvanized steel. Also disclosed are coated substrates produced thereby.Type: GrantFiled: December 13, 2006Date of Patent: July 6, 2010Assignee: PPG Industries Ohio, Inc.Inventors: Neil D. McMurdie, Mark W. McMillen, Edward F. Rakiewicz, Michelle S. Miles, Richard F. Karabin
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Publication number: 20100132843Abstract: A low sludge trivalent chromium based conversion coating bath is provided which forms corrosion resistant coatings on aluminum and aluminum alloys by immersion in aqueous solutions containing trivalent chromium ions and fluorometallate ions followed by optional rinsing. Trivalent chromium coated aluminum also serves as an effective base for paint primers.Type: ApplicationFiled: May 10, 2007Publication date: June 3, 2010Inventor: Kirk Kramer
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Publication number: 20100126633Abstract: An agent for the production of anti-corrosion layers on metal surfaces, produced by the following steps: A) producing an aqueous solution which contains at least the following: a) oxo-cations selected from MnO3+, VO3+, VO2+, WO22+, MoO22+, TiO2+, ZrO2+ and mixtures thereof, and b) halogen complex anions of the structure MXab?, wherein M is selected from B, Ti, Zr, Si, Al, X is selected from F, Cl, Br, I, a is an integer of between 3 and 6 and b is an integer of between 1 and 4, and B) forming nanoparticles having a mean particle diameter of <500 nm in the solution in situ by physical and/or chemical treatment of the solution, wherein the physical and/or chemical treatment is selected among a change in temperature, a change in the ion concentration, a change in the pH-value, a change in the pressure, supersaturation of the solution, agitation of the solution, adding an oxidising agent and/or adding a reducing agent.Type: ApplicationFiled: March 20, 2008Publication date: May 27, 2010Applicant: ATOTECH DEUTSCHLAND GMBHInventors: Hermann Donsbach, Udo Hofmann, Joerg Unger
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Publication number: 20100032060Abstract: Process of coating magnesium alloys to improve the corrosion resistance and adhesive bonding strengths of the alloys. The process comprises treating the magnesium alloys with an acidic aqueous solution comprising, per liter of solution, from about 0.01 to 10 grams of a water soluble trivalent chromium compound, about 0.01 to 10 grams of hexafluorozirconate, about 0.0 to 5.0 grams of at least one hexafluorosilicate and/or a tetrafluoroborate, from about 0.0 to 5.0 grams of at least one water soluble divalent zinc compound and from 0.0 to 10 grams of a water soluble thickener and/or 0.0 to 10 grams of a water soluble surfactant.Type: ApplicationFiled: February 15, 2005Publication date: February 11, 2010Inventors: Craig A. Matzdorf, William C. Nickerson, James L. Green
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Publication number: 20090288738Abstract: A method for recovering demineralized water from zirconium-containing rinse water having a pH lower than 6.0, wherein a) the rinse water has added to it an aqueous solution of Ca(OH)2 containing no more than 0.1 wt% undissolved Ca(OH)2, in a quantity such that the pH of the rinse water rises to a value in the range from 6.2 to 8.0, b) a precipitate that forms is separated from the rinse water, and c) the rinse water from which the precipitate was removed in step b) is subjected to an ion exchange method or to reverse osmosis.Type: ApplicationFiled: August 5, 2009Publication date: November 26, 2009Applicant: Henkel AG & Co. KGaAInventors: Jan-Willem Brouwer, Jens Krömer
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Patent number: 7575694Abstract: A process for chemically stripping a metallic coating on an external surface of a substrate without attacking an internal surface defined by an internal passage within the substrate. Processing steps include depositing within the internal passage a thermally-decomposable wax having a melting temperature above 75° C. so as to mask the internal surface of the substrate, and then treating the substrate with an aqueous solution containing an acid having the formula HxAF6 where A is silicon, germanium, titanium, zirconium, aluminum, or gallium, and x has a value of one to six. The aqueous solution is at a temperature below the melting temperature of the wax and substantially removes the metallic coating from the external surface of the substrate, while the wax is substantially unreactive with the aqueous solution and prevents the aqueous solution from contacting the internal surface of the substrate. Thereafter, the substrate is heated to thermally decompose the wax without producing hazardous byproducts.Type: GrantFiled: December 29, 2005Date of Patent: August 18, 2009Assignee: General Electric CompanyInventors: Lawrence Bernard Kool, Stephen Francis Rutkowski
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Patent number: 7575644Abstract: A solution for treating a surface of an iron material includes (a) zirconium fluoride; (b) ion of a rare earth element and/or a compound containing a rare earth element; (c) a polyallylamine; (d) aluminum ion; and (e) free fluorine ion. Zirconium in the component (a) is at a weight concentration A of 10 to 1000 ppm. The ratio K of the weight concentration B of the rare earth element in the component (b) to the weight concentration A (B/A) is 0.1 to 30. The component (d) is at a weight concentration D of 50 to 250 ppm. The component (e) is at a weight concentration E of 0.5 to 30 ppm. A coating having excellent corrosion resistance before and after the subsequent coating can be deposited on the surface of an iron material by using the surface treating solution which does not contain environmentally harmful ingredients.Type: GrantFiled: June 7, 2007Date of Patent: August 18, 2009Assignees: Nihon Parkerizing Co., Ltd., Honda Motor Co., Ltd.Inventors: Hideki Takakuwa, Yuko Takanashi, Katsutoshi Ando, Yasuhito Murai
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Patent number: 7531051Abstract: The present invention is the method for surface treatment of a metal material containing iron and/or zinc, containing component (A) and component (B); where (A) is a compound containing at least one metal element selected from the group consisting of Ti, Zr, Hf and Si, (B) is a compound containing fluorine as a supplying source of HF, wherein the ratio K=A/B between the total mole weight A of metal elements of Ti, Zr, Hf and Si in the compound of component (A) and the mole weight B which when the total fluorine atoms in the fluorine-containing compound of component (B) is converted to HF is within the range of 0.06?K?0.18, and the concentration of component (A) indicated by the total mole concentration of metal elements of Ti, Zr, Hf and Si is within the region of 0.05 to 100 m mol/L. To the treating solution for surface treatment, at least one compound containing at least one metal element selected from the group consisting of Ag, Al, Cu, Fe, Mn, Mg, Ni, Co and Zn can be blended.Type: GrantFiled: June 12, 2002Date of Patent: May 12, 2009Assignees: Nihon Parkerizing Co., Ltd., Toyota Jidosha Kabushiki Kaisha, Daihatsu Motor Co., Ltd.Inventors: Takaomi Nakayama, Hiroyuki Sato, Tetsuo Ootsuki, Tadashi Matsushita, Eisaku Okada, Fumiya Yoshida, Katsuhiro Shiota
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Patent number: 7510612Abstract: The present invention disclosure provides a chemical conversion coating agent which places a less burden on the environment and can apply good chemical conversion treatment to all metals such as iron, zinc and aluminum, and a surface-treated metal obtained using the same.Type: GrantFiled: December 23, 2003Date of Patent: March 31, 2009Assignee: Nippon Paint Co., Ltd.Inventors: Masahiko Matsukawa, Kazuhiro Makino, Toshiaki Shimakura
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Publication number: 20090032144Abstract: Disclosed are methods for treating metal substrates, including ferrous substrates, such as cold rolled steel and electrogalvanized steel. The methods include contacting the substrate with a pretreatment composition that includes: (a) a group IIIB and/or IVB metal; (b) free fluorine; (c) a metal fluoride salt formed from a metal which forms a fluoride salt having a pKsp of at least 11; and (d) water.Type: ApplicationFiled: August 3, 2007Publication date: February 5, 2009Inventors: Mark W. McMillen, Edward F. Rakiewicz
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Publication number: 20080245444Abstract: Chromate-free and metal phosphate free treatments and compositions for applying a conversion or passivation coating for metals, more particularly, steel, zinc coated steel, and aluminum surfaces. The methods of the invention comprise contacting the requisite metal surface with a treatment composition comprising a member or members comprising one or more Group IV B elements, fluoride, and phosphonic acid or phosphonate. Optionally, a silane may be added as a treatment component.Type: ApplicationFiled: June 10, 2008Publication date: October 9, 2008Applicant: General Electric CompanyInventors: Edward A. Rodzewich, Jeffrey I. Melzer, Philip D. Deck, Donald W. Whisenhunt, William S. Carey, David B. Engel, Bret Chisholm, Christopher M. Carter
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Patent number: 7422793Abstract: Rinsing or sealing solutions comprising a rare earth element and a valence stabilizer for barrier films. The treated films contain a rare earth/valence stabilizer complex. The rare earth element is selected from cerium, praseodymium, terbium, or combinations thereof, and at least one rare earth element is in the tetravalent oxidation state. The rinsing or sealing solution may also contain an optional preparative or solubility control agent. The oxidized rare earth element is present in the coating in a “sparingly soluble” form. The valence stabilizers can be either inorganic or organic in nature. A number of rare earth/valence stabilizer combinations that match the performance of conventional hexavalent chromium systems are presented.Type: GrantFiled: July 23, 2003Date of Patent: September 9, 2008Assignee: University of DaytonInventors: Andrew Wells Phelps, Jeffrey Allen Sturgill, Joseph Thomas Swartzbaugh
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Patent number: 7407711Abstract: Conversion coatings comprising a rare earth element and a valence stabilizer combined to form a rare earth/valence stabilizer complex are described for substrate metals. The rare earth element is selected from cerium, praseodymium, terbium, or combinations thereof, and at least one rare earth element is in the tetravalent oxidation state. The coating bath may also contain a preparative or solubility control agent. The oxidized cerium, praseodymium or terbium is present in the coating in a “sparingly soluble” form. The valence stabilizers can be either inorganic or organic in nature. A number of cerium, praseodymium, or terbium/valence stabilizer combinations are presented that can equal the performance of conventional hexavalent chromium systems.Type: GrantFiled: July 23, 2003Date of Patent: August 5, 2008Assignee: University of DaytonInventors: Andrew Wells Phelps, Jeffrey Allen Sturgill, Joseph Thomas Swartzbaugh
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Patent number: 7402214Abstract: An aqueous composition for pretreating and depositing a coating on metal substrates is provided. The coating composition includes from about 1,500 to about 55,000 ppm based on the aqueous composition of a Group IIA dissolved metal ion, from about 100 to about 200,000 ppm based on the aqueous composition of a dissolved complex metal fluoride ion wherein the metal atom is selected from Group IIIA, Group IVA, Group IVB metals, Group VA, Group VB metals; and water. The composition is free of Group IIA metal fluoride precipitate achieved by including in the composition a complex metal salt different than the salt associated with the complex metal fluoride ion, with the complex metal salt being capable of complexing free fluoride ions to prevent a precipitation reaction. A process for coating a metal substrate with such an aqueous composition is further provided.Type: GrantFiled: April 28, 2003Date of Patent: July 22, 2008Assignee: PPG Industries Ohio, Inc.Inventors: Jeffrey Allen Greene, Donald Robb Vonk
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Patent number: 7291217Abstract: A corrosion-inhibiting pigment comprising a rare earth element and a valence stabilizer combinded to form a rare earth/valence stabilizer complex. The rare earth element is selected from cerium, terbium, praseodymium, or a combination thereof, and at least one rare earth element is in the tetravalent oxidation state. An inorganic or organic material is used to stabilize the tetravalent rare earth ion to form a compound that is sparingly soluble in water. Specific stabilizers are chosen to control the release rate of tetravalent cerium, terbium, or praseodymium during exposure to water and to tailor the compatibility of the powder when used as a pigment in a chosen binder system. Stabilizers may also modify the processing and handling characteristics of the formed powders. Many rare earth-valence stabilizer combinations are presented that can equal the performance of conventional hexavalent chromium systems.Type: GrantFiled: July 23, 2003Date of Patent: November 6, 2007Assignee: University of DaytonInventors: Andrew Wells Phelps, Jeffrey Allen Sturgill, Joseph Thomas Swartzbaugh
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Publication number: 20070187001Abstract: Corrosion resistant coatings are formed on aluminum by contacting with aqueous solutions containing trivalent chromium ions and fluorometallate ions, the solutions being substantially free of hexavalent chromium. Trivalent chromium films formed on the aluminum surface when tested in 5% NaCl salt spray chamber showed corrosion resistance in excess of 168 hours. Trivalent chromium coated aluminum also serves as an effective base for paint primers.Type: ApplicationFiled: February 13, 2007Publication date: August 16, 2007Inventors: Kirk Kramer, Lisa Salet
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Patent number: 7156905Abstract: The invention relates to a composition and method for treating a magnesium alloy. The inventive composition comprises an acid aqueous solution containing niobium pentoxide, a water-soluble cerium salt and, optionally, a zirconium salt and/or hydroflouric acid. Said method consists in submerging a magnesium alloy part in said composition. The invention can be used to protect magnesium alloy parts against corrosion.Type: GrantFiled: May 31, 2002Date of Patent: January 2, 2007Assignee: Universite Pierre & Marie CurieInventors: Hélène Ardelean, Philippe Marcus
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Patent number: 7153348Abstract: A hexavalent chromium-free surface treating agent for Sn- or Al-based coated steel sheet, comprising a trivalent chromium compound (A), a water-dispersible silica (B), a lubricity imparting component (C) made of one or more waxes of polyolefin wax, fluorine-containing wax and paraffin wax, and water, a mass ratio on the solid content basis of the water-dispersible silica (B) to the lubricity imparting component (C), (B)/(C), being within a range from 5/95 to 95/5.Type: GrantFiled: September 6, 2001Date of Patent: December 26, 2006Assignee: Nippon Steel CorporationInventors: Teruaki Izaki, Masahiro Fuda, Mitsuru Nakamura, Katsuyuki Kawakami, Kensuke Mizuno
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Patent number: 7030183Abstract: A plating solution containing zinc, an electrically conductive salt, an adsorbent, and at least one of mono- to hexavalent metal ions. A treatment using either a solution which contains, all per liter, 2–60 g Zn, 40–300 g caustic alkali, 0.01–50 g adsorbent, 0.002–10 g Fe, 0.002–10 g Co, 0.05–30 g Mn, 0.001–2 g Cu, 0.005–10 g Ni, 0.002–3 g of at least one chosen from among Mo, W, V, Ti, Al, Ca, Ba, and Sn, and 0.01–30 g aliphatic amine or aliphatic amine polymer or a solution which contains, all per liter, 2–40 g Zn, 40–170 g caustic alkali, 0.01–50 g adsorbent, either 0.001–3 g Fe and 0.001–3 g Co or 0.005–5 g Fe and 0.005–5 g Ni, and 0.01–30 g aliphatic amine or aliphatic amine polymer.Type: GrantFiled: September 9, 2002Date of Patent: April 18, 2006Assignee: Nihon Hyomen Kagaku Kabushiki KaishaInventors: Masaaki Yamamuro, Mitsuomi Katori
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Patent number: 6946201Abstract: A chromium(VI)-free, chromium(III)-containing and substantially coherent conversion layer on zinc or zinc alloys presenting, even in the absence of further components such as silicate, cerium, aluminum and borate, a corrosion protection of approx. 100 to 1000 h in the salt spray test according to DIN 50021 SS or ASTM B 117-73 until first attack according to DIN 50961 Chapter 10; being clear, transparent and substantially colorless and presenting multi colored iridescence; having a layer thickness of approx. 100 nm to 1000 nm; and being hard, adhering well and being resistant to wiping.Type: GrantFiled: July 13, 2001Date of Patent: September 20, 2005Assignee: SurTec International GmbHInventors: Patricia Preikschat, Rolf Jansen, Peter Hulser
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Patent number: 6860687Abstract: A weld-on part made of aluminum or an aluminum alloy, such as but not limited to a stud (1), which has a surface which is at least partially provided with a layer (5) which contains a titanium containing material. The stud (1) is treated with a chrome-free passivating solution which imparts corrosion resistance while simultaneously causing a layer (5) of titanium containing material to be formed on at least a portion of the surface of the stud (1). The layer (5) of titanium containing material permits the stud (1) to be satisfactorily welded to a surface, without the occurrence of arc jumping or blowing, in part, by lowering contact resistance during the welding process.Type: GrantFiled: December 7, 1999Date of Patent: March 1, 2005Assignee: Newfrey LLCInventors: Klaus G. Schmitt, Michael Krengel
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Patent number: 6841009Abstract: Disclosed is a reaction vessel used for oxidizing and decomposing equipment suitable for processing with supercritical water, and methods of manufacturing the reaction vessel. The reaction vessel comprises an oxide film containing a platinum group metal oxide for example having a fine crystalline structure, and a high corrosion resistance in both oxidizing and reducing atmosphere. The film is formed on a surface of the vessel by performing a pyrolysis reaction in an atmosphere containing water vapor. The oxide film is comprised of at least one platinum group metal oxide selected from Ir, Ru or Rh oxide, and at least one oxide of a metal selected from Ti and Ta.Type: GrantFiled: March 7, 2003Date of Patent: January 11, 2005Assignee: Furuyametal Co., Ltd.Inventors: Takahito Furuya, Takayuki Shimamune
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Publication number: 20040244874Abstract: The present invention is the method for surface treatment of a metal material containing iron and/or zinc, comprising component (A) and component (B);Type: ApplicationFiled: July 19, 2004Publication date: December 9, 2004Inventors: Takaomi Nakayama, Hiroyuki Sato, Tetsuo Ootsuki, Tadashi Matsushita, Eisaku Okada, Fumiya Yoshida, Katsuhiro Shiota
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Publication number: 20040244875Abstract: It is an object of the present invention to provide a method of metal surface treatment and a surface treated metal thereby, which has excellent corrosion resistance and can form a coat having high corrosion resistance on metal substrates such as iron, zinc, aluminum and magnesium.Type: ApplicationFiled: June 8, 2004Publication date: December 9, 2004Inventors: Mitsuhiro Yasuda, Toshio Inbe, Norizumi Matsui, Katsuyoshi Yamasoe
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Patent number: 6821633Abstract: In at least one aspect, the invention relates to an entirely or substantially chromium-free conversion coating composition and process for conversion coating metal surfaces that provides corrosion resistance. In at least another aspect, the present invention relates to an article having a metal surface that is at least partially coated with an entirely or substantially chromium-free conversion coating that provides corrosion resistance. In certain embodiments, the conversion coating composition comprises water and (A) dissolved fluorometallate anions selected from the group consisting of TiF6−2, ZrF6−2, HfF6−2, SiF6−2, AlF6−3, GeF6−2, SnF6−2, BF4−, and mixtures thereof and (B) a water-soluble polymer which is a Mannich adduct of poly(4-vinyl phenol) and N-methyl ethanolamine. In other embodiments, the composition also comprises (C) a water-soluble polymer which is a Mannich adduct of poly(4-vinyl phenol) and N-methyl glucamine.Type: GrantFiled: May 16, 2003Date of Patent: November 23, 2004Assignee: Henkel Kommanditgesellschaft auf Aktien (Henkel KGaA)Inventors: Jianping Liu, Patrick A. Scalera, Shawn E. Dolan
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Patent number: 6818313Abstract: A corrosion-inhibiting coating, process, and system that provides a tight, adherent zinc- or zinc-alloy coating that is directly deposited onto steel or cast iron surfaces for enhanced corrosion protection. A process for applying the coating is also provided. The process includes the application of two sequential aqueous baths. The first bath contains a precursor zinc compound while the second bath contains a reducing agent to deposit the zinc directly upon the steel or cast iron.Type: GrantFiled: July 24, 2002Date of Patent: November 16, 2004Assignee: University of DaytonInventors: Andrew W. Phelps, Jeffrey A. Sturgill
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Publication number: 20040187967Abstract: It is an object of the present invention to provide a chemical conversion coating agent which places a less burden on the environment and can apply good chemical conversion treatment to all metals such as iron, zinc and aluminum.Type: ApplicationFiled: December 23, 2003Publication date: September 30, 2004Applicant: Nippon Paint Co., Ltd.Inventors: Masahiko Matsukawa, Kazuhiro Makino, Toshiaki Shimakura
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Publication number: 20040168748Abstract: The invention relates to an addition product that can be produced from hexafluorosilicic acid, hexafluorotitanic acid, and/or hexafluorozirconic acid by an acid-base reaction with one or several organic bases and a method for production and use thereof. The addition products according to the invention guarantee a rapid and lasting inhibition of corrosion processes; they are in particular suitable for inhibiting the corrosion of light metals.Type: ApplicationFiled: September 24, 2003Publication date: September 2, 2004Inventors: Andreas Hartwig, Kerstin Albinsky
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Patent number: RE40406Abstract: A composition and method for coating and touching up a metal surface is provided. The composition contains from about 0.5 to about 240 millimoles per kilogram of a fluorometallate ion, from about 0.5 grams/liters to about 10 grams/liter of phosphorous-containing inorganic oxy anions calculated at their stoichiometric equivalent as H3PO4; from about 0.05 g/l to about 3.5 g/l of hexavalent chromium and from about 0.10 g/l to about 2.20 g/l of trivalent chromium ions and a surfactant.Type: GrantFiled: March 26, 2004Date of Patent: July 1, 2008Assignee: Henkel KGaAInventors: David R. McCormick, Andreas Lindert