Contains Dicarboxylic Acid Or Salt Thereof Which Reacts With Metal Substrate Patents (Class 148/252)
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Patent number: 11788191Abstract: A sliding member includes, on a surface of a metal substrate, a surface-treated layer including a zinc-electroplated layer, a chemical conversion-treated layer, and a topcoat layer sequentially stacked on the metal substrate. The chemical conversion-treated layer includes chromium and oxygen. The topcoat layer includes at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin. A method of manufacturing the sliding member includes a step of forming, on a surface of the chemical conversion-treated layer, the topcoat layer including at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin.Type: GrantFiled: March 3, 2017Date of Patent: October 17, 2023Assignee: NISSAN MOTOR CO., LTD.Inventors: Satoshi Watanabe, Soichiro Sugawara, Ikuo Konno
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Patent number: 11338323Abstract: A method of attaching heterogeneous materials comprising pretreating the surface of a metal plate with an aromatic compound containing a pyrogallol group to bind the pyrogallol group to the surface of the metal plate and coating the pyrogallol-group-bound metal plate with a polymer resin, thereby greatly improving the adhesive strength between the metal plate and the polymer resin.Type: GrantFiled: November 25, 2019Date of Patent: May 24, 2022Assignees: Hyundai Motor Company, Kia Motors Corporation, Chung-Ang University Industry-Academy Cooperation FoundationInventors: Sung Ho Yoon, Yun Ho Cho, Gyu Hyeong Choe, Jong Hwi Lee, Soo Min Bae
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Patent number: 11326259Abstract: A method of improving corrosion and mar resistance of steel components by creating a black magnetite finish, with a medium temperature process, prior to application of a phosphate layer coating.Type: GrantFiled: June 8, 2018Date of Patent: May 10, 2022Assignee: Snap-on IncorporatedInventor: Ricardo L M Guedes
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Patent number: 11214881Abstract: A method for post-treatment of a chromium finish surface to improve corrosion resistance comprising a) providing a substrate having a chromium finish surface, and at least one intermediate layer between the chromium finish surface and the substrate, selected from the group consisting of nickel, nickel alloys, copper and copper alloys, wherein the chromium finish surface is a surface of a trivalent chromium plated layer, obtained by electroplating the substrate, having the at least one intermediate layer, in a plating bath, the plating bath comprising chromium (III) ions; b) contacting the chromium finish surface with an aqueous solution, comprising a permanganate, at least one compound which is selected from a phosphorus-oxygen compound, a hydroxide, a nitrate, a borate, boric acid, a silicate, or a mixture of two or more of these compounds; c) forming a transparent corrosion protection layer onto the chromium finish surface during step b.Type: GrantFiled: June 25, 2021Date of Patent: January 4, 2022Assignee: Atotech Deutschland GmbHInventors: Christina Pfirrmann, Berkem Özkaya, Philipp Wachter, Nancy Born
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Patent number: 9903037Abstract: Coating a metallic surface with at least one of a pretreatment composition prior to organic coating, with a passivation composition without intent for subsequent organic coating, with a pretreatment primer composition, with a primer composition, with a paint composition and with an electrocoating composition, wherein the coating composition includes particles on a base of at least one layered double hydroxide (LDH) phase characterized by the general formula [M2+(1±0.5)?x(M3+, M4+)x(OH)2±0.75]An?x/n.mH2O.Type: GrantFiled: April 17, 2013Date of Patent: February 27, 2018Assignees: Chemetall GmbH, Airbus Defence and Space GmbH, Mankiewicz Gebr. & Co. (GmbH & Co. KG), Universidade De AveiroInventors: Mario Ferreira, Mikhail Zheludkevich, Joáo Tedim, Valérie Gandubert, Thomas Schmidt-Hansberg, Theo Hack, Sonja Nixon, Dominik Raps, Diana Kirsch, Sven Schröder
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Patent number: 9879347Abstract: A method for surface treatment of a part made of aluminum, magnesium, or one of the alloys thereof, to protect the part from corrosion. The method comprises consecutively immersing the part in a first aqueous bath containing a corrosion-inhibiting metal salt and an oxidizing compound, and a second aqueous bath containing an oxidizing compound and a corrosion-inhibiting rare-earth salt. The method can be carried out for the chemical conversion of aluminum or the alloys thereof, and of magnesium or the alloys thereof, on parts that have not been previously treated, or after anodizing the part to seal the anodic layer.Type: GrantFiled: February 11, 2013Date of Patent: January 30, 2018Assignee: MECAPROTEC INDUSTRIESInventors: Pierre Bares, Cedric Stephan, Celine Gazeau
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Patent number: 9738790Abstract: The invention relates to a process for producing a corrosion-inhibiting coating for substrates having a surface consisting of zinc, magnesium, aluminum or one of their alloys, wherein the surface to be treated is brought into contact in direct succession with two aqueous treatment solutions containing chromium(III) ions, metal ions of the substrate surface to be treated and at least one complexing agent. The first treatment solution has a pH in the range from 1.0 to 4.0, while the second treatment solution has a pH of from 3.0 to 12.0. The process of the invention produces a smaller amount of wastewater polluted with heavy metals.Type: GrantFiled: May 26, 2010Date of Patent: August 22, 2017Assignee: Atotech Deutschland GmbHInventors: Udo Hofmann, Volker Krenzel
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Patent number: 9416338Abstract: Cleaning compositions and processes for cleaning residue from a microelectronic device having said residue thereon. The composition comprises at least one amine, at least one oxidizing agent, water, and at least one borate species and achieves highly efficacious cleaning of the residue material, including post-ash residue, post-etch residue, post-CMP residue, particles, organic contaminants, metal ion contaminants, and combinations thereof from the microelectronic device while simultaneously not damaging the titanium nitride layers and low-k dielectric materials also present on the device.Type: GrantFiled: October 13, 2011Date of Patent: August 16, 2016Assignees: ADVANCED TECHNOLOGY MATERIALS, INC., INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Emanuel I. Cooper, George Gabriel Totir, Makonnen Payne
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Patent number: 9234283Abstract: The corrosion resistance of a metal substrate surface treated with an acidic aqueous composition to form a conversion coating is improved by first contacting the surface with an oxidizing acidic pre-rinse, such as an aqueous solution of nitric acid and hydrogen peroxide, or nitric acid and hydrofluoric acid, or Fe+3 cations and hydrofluoric acid.Type: GrantFiled: February 12, 2008Date of Patent: January 12, 2016Assignee: Henkel AG & Co. KGaAInventors: Todd R. Bryden, Jeng-Li Liang, Jianping Liu, John Zimmerman, Edis Kapic, Bruce Goodreau
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Patent number: 9187651Abstract: The invention relates to corrosion inhibitors, and more specifically corrosion inhibitors for coating compositions. The invention provides for coating compositions that have improved corrosion properties, including reduced flash rust during the application of the coating composition to a metal surface, and even improved corrosion inhibition in the resulting dried coating. The invention also provides for methods of making and using the described the compositions and the corrosion inhibitors thereof.Type: GrantFiled: March 1, 2013Date of Patent: November 17, 2015Assignee: The Lubrizol CorporationInventors: Britt A. Minch, Gregory E. Moran, David Boothe, Daniel W. Hunt, Ben Faber, Pedro J. Velis
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Patent number: 8951363Abstract: The invention refers to a process for producing an anticorrosive coating in which a surface to be treated is brought into contact with an aqueous treatment solution containing chromium(III) ions and at least one phosphate compound and an organosol. The corrosive protection of metal surfaces, in particular those containing zinc and zinciferous surfaces with conversion layers is improved. The decorative and functional properties of the surfaces are retained or improved. In addition, the well-known problems associated with the use of compounds containing chromium(VI) or with multi-stage processes are avoided in which a passivation layer containing chromium ions and a sealing are applied one after the other.Type: GrantFiled: July 5, 2010Date of Patent: February 10, 2015Assignee: Atotech Deutschland GmbHInventors: Udo Hofmann, Hermann Donsbach, Joerg Unger, Volker Krenzel
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Publication number: 20140048181Abstract: A flat steel product, intended to be formed into a component by hot press forming and having a base made of steel, onto which a metal anti-corrosion coating of a Zn or a Zn alloy is applied. A separate finishing coat is applied to at least one of the free surfaces of the flat steel product. The finishing coat includes at least one base metal compound (oxide, nitride, sulphide, sulphate, carbide, carbonate, fluoride, hydrate, hydroxide, or phosphate). Also, a method enabling the production of a flat steel product of this kind.Type: ApplicationFiled: March 8, 2012Publication date: February 20, 2014Applicant: THYSSENKRUPP STEEL EUROPE AGInventors: Janko Banik, Marc Blumenau, Maria Koeyer, Tobias Lewe, Axel Schrooten
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Patent number: 8591638Abstract: A tin or tin alloy plating film surface treatment aqueous solution that can reduce whiskers on the surface of a tin or tin alloy plating film, and can provide a favorable tin or tin alloy plating film using a simple method for tin or tin alloy plating films that are used on electronic components.Type: GrantFiled: September 22, 2009Date of Patent: November 26, 2013Assignee: Rohm and Haas Electronic Materials LLCInventor: Yutaka Morii
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Patent number: 8568522Abstract: Process for passivating metallic surfaces, and a preparation suitable for implementing the process, comprising at least water, an acid, and a copolymer of functionalized (meth)acrylic esters, monomers containing phosphoric and/or phosphonic acid groups, monomers having COOH groups, and, if appropriate, further monomers. Copolymer which comprises said monomers.Type: GrantFiled: July 18, 2007Date of Patent: October 29, 2013Assignee: BASF SEInventors: Frank Klippel, Alexander Göthlich, Gunnar Schornick, Dietrich Fehringer, Thomas Heidenfelder, Helmut Witteler, Walter Bertkau
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Patent number: 8337641Abstract: Disclosed is a treatment solution for use in the formation of a black trivalent chromium chemical conversion coating film with uniformly stabilized black wash, luster and corrosive resistance irrespective of the type of the acidic, neutral or alkaline zinc plating bath employed or the presence or absence of nickel eutectoid. Also disclosed is a method of forming the black trivalent chromium chemical conversion coating film. The treatment solution comprises a trivalent chromium ion, a chelating agent capable of forming a water-soluble complex with the trivalent chromium, at least one metal ion selected from the group consisting of a cobalt ion, a nickel ion and an iron ion, and formic acid or a salt thereof as a buffer for hydrogen ion concentration. The treatment solution can be used for forming a black hexavalent chromium-free chemical conversion coating film on zinc or a zinc alloy.Type: GrantFiled: April 4, 2008Date of Patent: December 25, 2012Assignee: Dipsol Chemicals Co., Ltd.Inventors: Tomitaka Yamamoto, Naoki Okabe
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Patent number: 8293029Abstract: Chromium-free conversion coating treatment solutions and processes for depositing a colored layer on zinc or galvanized steel, aluminum, magnesium or their alloys, are provided comprising: hexafluorotitanate and/or hexafluorozirconate ions; molybdate and/or tungstate ions; one or more chelating complex formers; and a copolymer of alkylene phosphonic or alkylene phosphinic acid and one or more unsaturated carboxylic acids.Type: GrantFiled: January 31, 2006Date of Patent: October 23, 2012Assignee: Henkel AG & Co. KGaAInventors: Ulrich Jueptner, Joerg Becker
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Patent number: 8287663Abstract: A process for forming a magnetite coating on a ferrous metal surface and for chemical reagents used to implement the coating process. The process comprises the step of making the ferrous metal surface more reactive by contacting the surface with an activating reagent and then contacting the activated surface with an oxidizing reagent to form the coating at a relatively low temperature range. The surface is activated by contact with an acid solution to form a surface rich in reactive iron. The activated surface is then oxidized by contact with an aqueous reagent of alkali metal hydroxide, alkali metal nitrate, alkali metal nitrite, and mixtures thereof.Type: GrantFiled: May 17, 2011Date of Patent: October 16, 2012Assignee: Birchwood Laboratories, Inc.Inventors: William V. Block, Bryce D. Devine
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Patent number: 8273189Abstract: The invention relates to a method for the carboxylation conversion of a metal surface under oxidizing conditions in relation to the metal, consisting in bringing the metal into contact with a hydro-organic or aqueous bath containing a mixture of organic acids. The invention is characterized in that; the organic acids comprise saturated linear carboxylic acids having between 10 and 18 carbon atoms; the mixture comprises a binary or ternary mixture of such acids; the respective proportions of said acids are such that (i) for a binary mixture x±5%?y±5%, wherein x and y represent the respective proportions, in molar percentages, of the two acids in a mixture with the composition of the eutectic and (ii) for a ternary mixture x±3%?y±3%?z±3%, wherein x, y and z represent the respective proportions, in molar percentages, of the three acids in a mixture with the composition of the eutectic; and the concentration of the mixture in the bath is greater than or equal to 20 g/l.Type: GrantFiled: April 9, 2009Date of Patent: September 25, 2012Assignees: ArcelorMittal France, Total FranceInventors: Herve Derule, Lydia Rachiele, Sophie Jacques, Nicole Genet, Jean Steinmetz, Emmanuel Rocca
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Patent number: 8252381Abstract: A coated metal surface is disclosed, with a chemically-bonded film of long-chain organic groups. Such coating may be hydrophobic, and therefore repel the presence of water. This allows the surface to resist corrosion and surface oxidation, without diminishing the desired metallic characteristics of the surface. Further disclosed are methods for applying and coating on various substrates. Such coating may be advantageously applied to protect metals from corrosive environments such as air, water, chemicals, and bodily fluids.Type: GrantFiled: April 6, 2007Date of Patent: August 28, 2012Assignee: CSL, Inc.Inventors: Sunity K. Sharma, Ravi Shankar, Jaspreet S. Dhau, Naishadh K. Saraiya
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Patent number: 8083842Abstract: Disclosed is an aqueous solution of a chromium salt, in which the oxalic acid content is 8% by weight or less relative to chromium. In the aqueous solution of the chromium salt, the total organic carbon content is 4% by weight or less relative to chromium. The chromium salt is preferably a chromium chloride, a chromium phosphate, or a chromium nitrate. The chromium chloride preferably contains a basic chromium chloride represented by the composition formula Cr(OH)xCly (wherein 0<x?2, 1?y<3, and x+y=3). The chromium phosphate is preferably one represented by the composition formula Cr(H3?3/nPO4)n (wherein n is a number satisfying 2?n?3). The chromium nitrate is preferably a basic chromium nitrate represented by the composition formula Cr(OH)x(NO3)y (wherein 0<x?2, 1?y<3, and x+y=3).Type: GrantFiled: December 23, 2009Date of Patent: December 27, 2011Assignee: Nippon Chemical Industrial Co., Ltd.Inventors: Hideki Kotaki, Tomohiro Banda, Takashi Hara, Nobuo Takagi
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Patent number: 7964044Abstract: A process for forming a magnetite coating on a ferrous metal surface and for chemical reagents used to implement the coating process. The process comprises the step of making the ferrous metal surface more reactive by contacting the surface with an activating reagent and then contacting the activated surface with an oxidizing reagent to form the coating at a relatively low temperature range. The surface is activated by contact with an acid solution to form a surface rich in reactive iron. The activated surface is then oxidized by contact with an aqueous reagent of alkali metal hydroxide, alkali metal nitrate, alkali metal nitrite, and mixtures thereof.Type: GrantFiled: October 28, 2004Date of Patent: June 21, 2011Assignee: Birchwood Laboratories, Inc.Inventors: William V. Block, Bryce D. Devine
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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: 20100230009Abstract: A processing solution for forming a hexavalent chromium free, corrosion resistant trivalent chromate conversion film on zinc or zinc alloy plating layers comprises: trivalent chromium and oxalic acid in a molar ratio ranging from 0.5/1 to 1.5/1, wherein the trivalent chromium is present in the form of water-soluble complex with oxalic acid; and cobalt ions, which do not form a hardly soluble metal salt with oxalic acid and are stably present in the processing solution without causing any precipitation; wherein the solution reacts with zinc when bringing it into contact with the zinc or zinc alloy plating to form a hexavalent chromium free, corrosion resistant, trivalent chromate conversion film containing zinc, chromium, cobalt, oxalic acid and silicon on the plating.Type: ApplicationFiled: May 21, 2010Publication date: September 16, 2010Applicant: DIPSOL CHEMICALS CO., LTD.Inventors: Katsuhide OSHIMA, Shigemi Tanaka, Manabu Inoue, Tomitaka Yamamoto
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Patent number: 7749337Abstract: Process for the passivation of metallic surfaces by treatment of the surface with an acidic, aqueous preparation which comprises at least one water-soluble acid group-containing polymer and Zn, Ca, Mg or Al ions, said process being in particular a continuous process for the passivation of strip metals.Type: GrantFiled: June 13, 2006Date of Patent: July 6, 2010Assignee: BASF SEInventors: Helmut Witteler, Walter Bertkau, Thomas Heidenfelder, Alexander Göthlich, Jens Haas, Frank Klippel, Gunnar Schornick
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Patent number: 7641721Abstract: Disclosed is an aqueous solution of a chromium salt, in which the oxalic acid content is 8% by weight or less relative to chromium. In the aqueous solution of the chromium salt, the total organic carbon content is 4% by weight or less relative to chromium. The chromium salt is preferably a chromium chloride, a chromium phosphate, or a chromium nitrate. The chromium chloride preferably contains a basic chromium chloride represented by the composition formula Cr(OH)xCly (wherein 0<x?2, 1?y<3, and x+y=3). The chromium phosphate is preferably one represented by the composition formula Cr(H3-3/nPO4)n (wherein n is a number satisfying 2?n?3). The chromium nitrate is preferably a basic chromium nitrate represented by the composition formula Cr(OH)x(NO3)y (wherein 0<x?2, 1?y<3, and x+y=3).Type: GrantFiled: November 22, 2004Date of Patent: January 5, 2010Assignee: Nippon Chemical Industrial Co., Ltd.Inventors: Hideki Kotaki, Tomohiro Banda, Takashi Hara, Nobuo Takagi
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Patent number: 7625439Abstract: The ferrous metal chemical conversion coating is comprised of mixed oxides and organometallic compounds of aluminum and iron. A ferrous metal substrate is immersed for a period of time in a bath composition, at a temperature, at a pH, and at a concentration for each constituent of the bath composition, that will form a coating with the desired characteristics. The bath composition comprises water, aluminum salt, oxalic acid, and an oxidizer. The conversion coating is amorphous in nature and can be formed as thin as 1 micron with a coating weight in the range of about 40-250 milligrams per square foot. When sealed with an appropriate rust preventive material, the coating enhances corrosion resistance of the ferrous metal substrate. It is an effective absorbent base for paint finishes. When top coated with a lubricant, the conversion coating aids (a) assembly of parts, (b) break-in of sliding surfaces, and (c) anti-galling.Type: GrantFiled: September 27, 2006Date of Patent: December 1, 2009Assignee: Birchwood Laboratories, Inc.Inventors: Bryce D. Devine, William V. Block
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Publication number: 20090242079Abstract: The invention relates to a method for the carboxylation conversion of a metal surface under oxidising conditions in relation to the metal, consisting in bringing the metal into contact with a hydro-organic or aqueous bath containing a mixture of organic acids. The invention is characterised in that; the organic acids comprise saturated linear carboxylic acids having between 10 and 18 carbon atoms; the mixture comprises a binary or ternary mixture of such acids; the respective proportions of said acids are such that (i) for a binary mixture x±5%?y±5%, wherein x and y represent the respective proportions, in molar percentages, of the two acids in a mixture with the composition of the eutectic and (ii) for a ternary mixture x±3%?y±3%?z±3%, wherein x, y and z represent the respective proportions, in molar percentages, of the three acids in a mixture with the composition of the eutectic; and the concentration of the mixture in the bath is greater than or equal to 20 g/l.Type: ApplicationFiled: April 9, 2009Publication date: October 1, 2009Applicants: ARCELORMITTAL FRANCE, TOTAL FRANCEInventors: Herve Derule, Lydia Rachiele, Sophie Jacques, Nicole Genet, Jean Steinmetz, Emmanuel Rocca
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Publication number: 20080199714Abstract: Process for the passivation of metallic surfaces, in particular of strip metals, by treatment of the surface with an acidic, aqueous preparation which comprises at least one water-soluble acid group-containing polymer and at least one wax.Type: ApplicationFiled: June 13, 2006Publication date: August 21, 2008Applicant: BASF AktiengesellschaftInventors: Helmut Witteler, Walter Bertkau, Thomas Heidenfelder, Alexander Gothlich
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Patent number: 7341677Abstract: A non-carcinogenic corrosion inhibiting additive includes an anodic corrosion inhibitor and/or a cathodic corrosion inhibitor and a solubility enhancer for the inhibitors in the form of a metal complexing agent.Type: GrantFiled: June 30, 2003Date of Patent: March 11, 2008Assignee: United Technologies CorporationInventors: Xiaomei Yu, Weilong Zhang, Thomas Garosshen, Promila Bhatia, Mark Jaworowski, Foster Lamm, Xia Tang, Amy Besing, Mike A. Kryzman, Xiaoyuan Chang
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Patent number: 7037384Abstract: A composition for treating the surface of a ferrous metal. The composition comprises aluminum sulfate, boric acid or a boric acid precursor, and polycarboxylic acid or salt thereof. Treatment of the ferrous metal with an aqueous solution of the composition at elevated temperature and low pH provides a coating that imparts lubricity to the metal, thereby facilitating metalworking processes such as drawing for wire production.Type: GrantFiled: June 23, 2003Date of Patent: May 2, 2006Assignee: Bulk Chemicals, Inc.Inventor: David Roy Pawloski
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Patent number: 6834667Abstract: In a fuel injection valve, an adjustment pipe made of stainless steel and for adjusting a compression amount of a spring biasing a valve member is press-fitted into a cylindrical housing made of stainless steel, and a fuel injection amount is adjusted by adjusting a spring force of the spring in accordance with a press-fitted amount of the adjustment pipe. The adjustment pipe is immersed in an oxalic acid solution so that an oxalate film is formed thereon before being press-fitted into the cylindrical housing. Therefore, the oxalate film prevents a direct press-contact between an outer peripheral surface of the adjustment pipe and an inner peripheral surface of the cylindrical housing.Type: GrantFiled: November 6, 2001Date of Patent: December 28, 2004Assignee: Denso CorporationInventors: Sadao Sumiya, Hiroatsu Yamada
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Publication number: 20040118482Abstract: The invention relates to a method for treating a metal surface by carboxylation before forming, said metal being selected from zinc, iron, aluminium, copper, lead and the alloys thereof as well as copper-coated, aluminium-coated, galvanised steels. Said method is carried out in oxidising conditions in relation to the metal by bringing said metal into contact with an aqueous, organic or hydro-organic bath comprising at least one organic acid in free form or in salt form. The inventive method is characterised in that: the organic acid is a saturated or unsaturated aliphatic monocarboxylic or dicarboxylic acid; the organic acid is in solution and/or emulsion in the bath at a concentration greater than 0.1 mole/litre; the pH of the bath is acid.Type: ApplicationFiled: September 26, 2003Publication date: June 24, 2004Applicant: USINOR, ATOFINAInventors: Jean Steinmetz, Herve Derule, Emeryc Valot
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Publication number: 20040094236Abstract: Methods for passivating stainless steel after acid pickling treatment in the absence of nitric acid are provided. The methods include the steps of cleaning the pickled stainless steel with an alkaline composition to obtain clean steel, activating the clean steel with an activator composition to obtain activated steel, and passivating the activated steel with a passivating composition in the absence of nitric acid. In the preferred embodiment, the activator composition contains at least one activator, the activator having a significantly higher binding affinity for iron than for chromium as evidenced by their metal complex formation constants.Type: ApplicationFiled: September 19, 2003Publication date: May 20, 2004Applicant: Crown Technology, Inc.Inventor: Tucker D. Maurer
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Publication number: 20030155042Abstract: Alkyl-substituted hydroxylamines are useful as aids in the phosphating of metal substrates. In particular, the rate of phosphating and the rate at which manganese compounds are dissolved into aqueous phosphoric acid solutions may be accelerated by alkyl-substituted hydroxylamines.Type: ApplicationFiled: December 13, 2002Publication date: August 21, 2003Inventor: Richard Church
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Publication number: 20030150524Abstract: A process for the anti-corrosive treatment of vehicle bodies or domestic appliances which have, at least in part, a metal surface and wherein this metal surface consists of at least 90%, based on the metal surface, zinc, aluminum and/or magnesium and/or alloys of these metals with one another or with other alloying elements, wherein the vehicle bodies or domestic appliances are cleaned, passivated and painted, characterised in that, for the purpose of passivation, the vehicle bodies or domestic appliances are contacted with an aqueous solution having a pH of 1 to 12 and containing complex fluorides of Ti, Zr, Hf, Si and/or B in a quantity such that the content of Ti, Zr, Hf, Si and/or B is 20 to 500 mg/l, and 50 to 2000 mg/l organic polymers, the composition of the aqueous solution being selected such that no crystalline zinc-containing phosphate layer is formed on the metal surface.Type: ApplicationFiled: December 23, 2002Publication date: August 14, 2003Inventors: Winfried Wichelhaus, Bernd Schenzie, Heike Quellhorst
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Patent number: 6558480Abstract: A conversion coating that does not substantially diminish the luster of a metal surface on which it is coated nor impair adhesion to the surface of lacquers and printing inks commonly used on beverage containers may be provided by contacting the metal surface with an aqueous liquid composition comprising water and at least the following components: (A) a component of one or more dissolved transition metal compounds that contain zirconium and may also include titanium, provided that zirconium constitutes more than 30% of the moles of the total moles or zirconium and titanium; (B) a component of at least one dissolved compound that contains inorganically bonded fluorine and is not part of component (A); and (C) a component of dissolved organic polymer molecules.Type: GrantFiled: July 23, 2001Date of Patent: May 6, 2003Assignee: Henkel CorporationInventors: Gary L. Rochfort, Timm L. Kelly, Richard D. Banaszak
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Patent number: 6482273Abstract: The invention relates to a method for preparing workpieces suitable for phosphatizing for chipless cold forming by acid pickling, rinsing, drying and treatment with acid reaction lubricants containing phosphate ions. According to said method the workpieces are rinsed before drying with a solution which contains lactic acid, has a pH below 3 and preferably a temperature of between 60 and 80° C. Preferred embodiments of the invention consist of rinsing the workpieces with a solution which in addition contains phosphoric acid, has a lactic acid concentration of between 1 and 50 g/l and a weight ratio of lactic acid to phosphoric acid of between 1:9 and 9:1.Type: GrantFiled: April 6, 2001Date of Patent: November 19, 2002Assignee: Chemetall GmbHInventors: Klaus-Dieter Nittel, Uwe Rau
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Patent number: 6309476Abstract: This invention is a method for forming a chemical conversion coating on ferrous metal substrates, the chemical solutions used in the coating and the articles coated thereby. By modifying and combining the features of two existing, but heretofore unrelated, coating technologies, a hybrid conversion coating is formed. Specifically, a molecular iron/oxygen-enriched intermediate coating, such as a dicarboxylate or phosphate, is applied to a ferrous substrate by a first oxidation. The intermediate coating pre-conditions the substrate to form a surface rich in molecular iron and oxygen in a form easily accessible for further reaction. This oxidation procedure is followed by a coloring procedure using a heated (about 120-220° F.) oxidizing solution containing alkali metal hydroxide, alkali metal nitrate, alkali metal nitrite or mixtures thereof, which reacts with the iron and oxygen enriched intermediate coating to form magnetite (Fe3O4).Type: GrantFiled: May 24, 1999Date of Patent: October 30, 2001Assignee: Birchwood Laboratories, Inc.Inventors: Keith N. Ravenscroft, William V. Block
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Patent number: 6153021Abstract: A brazing material comprising a mixture of aluminum brazing powder (i.e. Si, Zn, Cu or Ge), flux, binder, and alcohol for diluting the binder is coated on a surface of an extruded flat tubed strip of aluminum type and this and aluminum type fins are brazed together.Type: GrantFiled: March 2, 1998Date of Patent: November 28, 2000Assignee: Nippon Light Metal Company Ltd.Inventors: Toshihiro Suzuki, Tsunehiko Tanaka, Meitoku Ogasawara
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Patent number: 5935348Abstract: Aqueous acid treatment solution for the treatment of beverage cans, in particular of aluminum, for producing a corrosion-protective, friction-reducing coating which improves the ability to be enameled, which comprises 0.14 to 2.25 mmol/l of an alkylamine oxide or an alkylammonium salt with an alkyl radical having 8 to 22 C atoms, 0.25-1.5 mmol/l of hydroxycarboxylic acids having 4-7 C atoms, complex fluorides and mineral acids, and preferably tannin.Type: GrantFiled: May 23, 1997Date of Patent: August 10, 1999Assignee: Henkel Kommanditgesellschaft auf AktienInventor: Henry Rossmaier
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Patent number: 5935656Abstract: A process for sealing anodized metal surfaces is characterized by bringing the anodized metal into contact with an aqueous solution at a temperature from 75.degree. C. to the boiling point of the solution for a time equal to from 0.5 to 2 minutes per micrometer of anodized layer thickness. The solution contains: a) from 0.0001 to 5 g/l of one or more alkali metal and/or alkaline earth metal ions and b) from 0.0005 to 0.5 g/l of one or more organic acids selected from: polycarboxylic acids with from 3 to 6 carboxyl groups; phosphonic acids; and/or polyphosphinocarboxylic acids, the solution containing a greater amount of metal ions of group a) than is needed to insure complete neutralization of the acids of group b).Type: GrantFiled: April 20, 1998Date of Patent: August 10, 1999Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Torsten Koerner, Josef Kresse, Wolf-Achim Roland, Juergen Lindener
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Patent number: 5928441Abstract: A hot rolling method of steel products comprises rolling steel products while forming a film of an oxalate (such as iron oxalate, calcium oxalate and the like) on the roll surfaces which have contact with the steel products to be rolled and a hot rolling roll for steel products which has an oxalate film on the roll surfaces having contact with the steel products to be rolled. The oxalate film is effective in preventing steel products, particularly stainless steel products, from seizing between the rolls and the steel products to be rolled, preventing wear of the rolls, and preventing the deterioration of both the rolls and the steel products, when the steel products are subjected to hot rolling.Type: GrantFiled: March 24, 1997Date of Patent: July 27, 1999Assignee: Sumitomo Metal Industries, Ltd.Inventors: Masaru Izawa, Yoshiaki Kusaba, Kenji Tsubouchi
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Patent number: 5916379Abstract: Disclosed herein are a composition comprising an aqueous solution of a gluconate salt and a citrate salt for treatment of a ferrous metal surface, and a method of application of such a composition for the protection of the ferrous metal surface against corrosion by inhibition of the formation of stop stain caused by the flash rusting.Type: GrantFiled: February 4, 1997Date of Patent: June 29, 1999Assignee: Abbey Research & Development Ltd.Inventors: Michael John Varley, John Bryan Thomas
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Zinc coated steel sheet and strip having improved formability and surface quality and method thereof
Patent number: 5795661Abstract: A method for improving the formability of zinc coated steel sheet, and the product produced therefrom. The steps of the method include applying to the zinc coating an oxalic acid solution in an amount that will form a zinc oxalate film having a coating weight in a range of s about 10 mg/ft.sup.2 to about 100 mg/ft.sup.2. A lubricant is applied to the zinc oxalate film, and the lubricant is adsorbed by the zinc oxalate film to provide a lubricated zinc oxalate film that is bonded to the zinc coating. The method produces an improved zinc coated sheet product having a tightly formed lubricated coating structure resistant to galling in the die steels of a forming press. The improved zinc coated sheet product having a lubricated zinc oxalate film improves formability and reduces the coefficient of friction during the forming operations that shape the zinc coated steel sheet or strip into a finished product shape.Type: GrantFiled: July 10, 1996Date of Patent: August 18, 1998Assignee: Bethlehem Steel CorporationInventor: Berta M. Taffinger -
Patent number: 5723183Abstract: The invention is the chemical composition and method for forming a chemical conversion coating on ferrous metal surfaces and subsequent coloring of said conversion coating through the application of a water-soluble dye. The conversion coating has an ordered crystalline structure composed of ferrous oxalate or other ferrous dicarboxylates. The conversion coating can be colored through the application of a water-soluble reactive dye which bonds with Fe (II) within the ferrous dicarboxylate matrix, bound to the dicarboxylate molecules, thereby becoming water insoluble and permanent. When sealed with an appropriate rust preventive top coat, the result is an attractive and protective finish of minimal thickness which can be applied through simple immersion process techniques. Said finish can serve as a final protective finish on a fabricated ferrous metal article and also affords a degree of lubricity for assembly, break-in purposes, or anti-galling protection and serves as an adhesive base for paint.Type: GrantFiled: September 16, 1996Date of Patent: March 3, 1998Assignee: Birchwood Laboratories, Inc.Inventors: Richard K. Williams, David J. Halverson, James N. Tuttle, Jr.
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Patent number: 5628839Abstract: Components of apparatus for film making and method for manufacturing the same include components made from aluminum alloy or aluminum without or with uneven surface of unevenness size of up to several mm, which are immersed in any one of sulfuric acid, phosphoric acid, oxalic acid, and chromic acid, and then washed and dried. Such components prevent the deposit of film forming materials on the components form peeling off during film making operation.Type: GrantFiled: April 2, 1996Date of Patent: May 13, 1997Assignee: Nihon Sinku Gijutsu Kabusiki KaishaInventors: Nobuyuki Saso, Tsutomu Hasegawa, Kano Kosaki, Hidenori Suwa
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Patent number: 5624712Abstract: Aluminum surfaces are protected with increased corrosion resistance by anodize, and sealing with a liquid fatty acid free of flammable solvents, suitably in the presence of a heterocyclic aromatic azole treating agent where the aluminum surface is of a copper containing aluminum alloy.Type: GrantFiled: June 8, 1995Date of Patent: April 29, 1997Assignee: Alumitec Products Corp.Inventor: Garson P. Shulman
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Patent number: 5385616Abstract: A method for inhibiting corrosion of a metal surface bearing a corrosion product including ferrous ions is disclosed. The method comprises applying to the surface a reaction product of an alcohol and a fatty acid maleic anhydride adduct produced by a reaction between maleic anhydride and an unsaturated fatty acid. Related compositions and coated metal surfaces are also disclosed.Type: GrantFiled: February 14, 1994Date of Patent: January 31, 1995Assignee: Petrolite CorporationInventors: James A. Dougherty, George W. Dear, Bernardus A. Oude
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Patent number: 5368655Abstract: There is described a process for chromating an article formed of a metal selected from the group consisting of zinc, cadmium and alloys thereof, which includes immersing the article in a water solution of a soluble chromic oxalate complex at a pH of from 1.2 to 3.0.Type: GrantFiled: October 23, 1992Date of Patent: November 29, 1994Assignees: Alchem Corp., Frederick Gumm Chemical Co., Inc.Inventor: Klaus P. Klos
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Patent number: 5350467Abstract: A method of heat treating e.g. an end zone of each of a plurality of metal articles such as fasteners comprises the steps of feeding each of the plurality of articles onto a conveyor means by which the articles are conveyed in succession in a generally upright orientation, towards and through a heat treatment apparatus where the zones are subjected to heat and conveying the articles from the heat treatment apparatus to a delivery point.Type: GrantFiled: March 31, 1993Date of Patent: September 27, 1994Inventor: Roy E. Evans