Inorganic Material Or Elemental Component Thereof, E.g., S, Metal, Etc. Patents (Class 106/14.21)
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Patent number: 6755917Abstract: An aqueous acidic solution for forming a conversion coating on the surface of a metallic material, said solution containing at least one rare earth element (as herein defined) containing species, an accelerator additive selected from the group consisting of metals of Group IB, IIB, IVA, VA, VIA and VIII of the Periodic Table, a peroxidic species and at least one acid selected from the group of mineral acids, carboxylic acids, sulphonic acids and phosphonic acids, wherein said solution contains no more than 20 mg/liter each of fluoride and of phosphate, and the solution is essentially free of chromate.Type: GrantFiled: November 20, 2001Date of Patent: June 29, 2004Assignee: Commonwealth Scientific and Industrial Research OrganisationInventors: Simon Gerard Hardin, Klaus Werner Wittel, Anthony Ewart Hughes, Karen Joy Hammon Nelson
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Patent number: 6749694Abstract: 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 substantially free of Group IIA metal fluoride precipitate. This is desirably achieved by including in the aqueous composition a complex metal salt which is 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 with the Group IIA metal ion. A method of preparing such an aqueous coating composition is further provided.Type: GrantFiled: April 29, 2002Date of Patent: June 15, 2004Assignee: PPG Industries Ohio, Inc.Inventors: Jeffrey Allen Greene, Donald Robb Vonk
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Patent number: 6716370Abstract: A corrosion inhibitor is described which includes several supramolecular oxo-anion compositions useful for preventing the propagation of pit corrosion on aluminum and aluminum alloys. The oxo-anion compositions preferably include soluble polymeric oxidic acids comprising combinations of molybdenum, phosphorous, tungsten, and silicon. These compositions are useful as corrosion inhibitors in high-moisture, corrosive environments, such as radiators and cooling systems. For low-moisture environments, these oxo-anion compositions can be reacted with a counter-ion, such as various metals, including, but not limited to the rear earth metals, to form a soluble salt. The salt can then be adsorbed onto a carrier, such as paint pigments, which can then be applied to the surfaces of aluminum and aluminum alloys. These surface adsorbates then become sparingly soluble and are gradually released over time in the presence of an aqueous corrosive agent so as to prevent propagation of pit corrosion.Type: GrantFiled: July 25, 2001Date of Patent: April 6, 2004Assignee: The Boeing CompanyInventor: Martin William Kendig
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Patent number: 6669764Abstract: Pretreated aluminum and aluminum alloys and the process and composition for pretreating said aluminum and its alloys to provide a coating with color recognition for identification purposes and to improved the corrosion-resistance, electrical conductivity, and adhesion properties which comprises pretreating said aluminum and its alloys with an effective amount of an acidic aqueous solution having a pH ranging from about 2.5 to 5.5 comprising water soluble trivalent chromium compounds, alkali metal hexafluorozirconates, divalent zinc compounds, alkali metal fluoro-compounds, and effective amounts of water soluble thickeners, surfactants or wetting agents.Type: GrantFiled: January 23, 2003Date of Patent: December 30, 2003Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig A. Matzdorf, William C. Nickerson, Jr.
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Publication number: 20030230215Abstract: Pretreated aluminum and aluminum alloys and the process and composition for pretreating said aluminum and its alloys to provide a coating with color recognition for identification purposes and to improved the corrosion-resistance, electrical conductivity, and adhesion properties which comprises pretreating said aluminum and its alloys with an effective amount of an acidic aqueous solution having a pH ranging from about 2.5 to 5.5 comprising water soluble trivalent chromium compounds, alkali metal hexafluorozirconates, divalent zinc compounds, alkali metal fluoro-compounds, and effective amounts of water soluble thickeners, surfactants or wetting agents.Type: ApplicationFiled: January 23, 2003Publication date: December 18, 2003Inventors: Craig A. Matzdorf, William C. Nickerson
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Patent number: 6663700Abstract: Aqueous compositions for post-treating metal coated substrates such as cadmium-plated steel, and zinc-nickel coated substrates and the process for using said compositions to provide a color recognizable coating and to improve the corrosion-resistance, abrasion, electrical, and adhesion properties of the coating. The post-treatment composition comprises an acidic aqueous solution having a pH ranging from about 2.5 to 5.5 and contains effective amounts of trivalent chromium compounds, alkali metal hexafluorozirconates, at least one divalent zinc compound, alkali metal fluoro-compounds, and effective amounts of water soluble thickeners, wetting agents or surfactants.Type: GrantFiled: January 23, 2003Date of Patent: December 16, 2003Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig A. Matzdorf, William C. Nickerson, Jr.
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Publication number: 20030221590Abstract: Corrosion-inhibiting pigments based on manganese are described that contain a heptavalent (permanganate), hexavalent (manganate), or pentavalent (manganate) compound. An inorganic or organic material is used with the heptavalent, hexavalent, or pentavalent manganese ion to form a compound that is sparingly soluble in water. Specific solubility control cations are chosen to control the release rate of heptavalent, hexavalent, or pentavalent manganese during exposure to water and to tailor the compatibility of the powder when used as a pigment in a chosen binder system. Solubility control agents may also modify the processing and handling characteristics of the formed powders. Many permanganate or manganate compounds are presented that can equal the performance of conventional hexavalent chromium systems. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.Type: ApplicationFiled: January 13, 2003Publication date: December 4, 2003Inventors: Jeffrey A. Sturgill, Andrew Wells Phelps
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Patent number: 6616739Abstract: A corrosion inhibited chloride salt is provided containing 30-38% by weight calcium chloride and up to 50% by weight based on the weight of the salt, of honey. This composition reduces the corrosivity of chloride salt up to as much as about 70% compared to that of the untreated sodium chloride solution. The corrosion-inhibited salt finds uses in a variety of applications, such as, for roadway deicing, freezeproofing, concrete additive and for dust suppression for example.Type: GrantFiled: October 29, 2002Date of Patent: September 9, 2003Assignee: General Chemical Industrial Products Inc.Inventor: James D. Spanos
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Patent number: 6605147Abstract: The use of surface-coated rutile modification TiO2 pigments having a primary particle grain size d50 of 0.1 to 1.0 &mgr;m as an anticorrosive white pigment, with firstly magnesium phosphate and secondly aluminum oxides and/or aluminum hydroxides being precipitated onto the TiO2 pigments, is described.Type: GrantFiled: June 14, 2002Date of Patent: August 12, 2003Assignee: Sachtleben Chemie GmbHInventors: Thomas Rentschler, Jochen Winkler
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Patent number: 6599351Abstract: Anticorrosive white pigments useful for inhibiting corrosion include surface-coated TiO2 base bodies, preferably in the rutile modification, having Mn3(PO4)2 and one or more of the substances chosen from aluminum oxides, aluminum hydroxides, aluminum phosphates, aluminum hydrogen phosphates, aluminum dihydrogen phosphates and aluminum polyphosphates are precipitated on to the TiO2 base bodies. Mn3(PO4)2 may be replaced completely or partially by Zn3(PO4)2. Phosphates and/or oxides of cerium may be additionally deposited singly, or several of them may be deposited, on to the TiO2 base bodies.Type: GrantFiled: April 4, 2002Date of Patent: July 29, 2003Assignee: Metallgesellschaft AktiengesellschaftInventors: Thomas Rentschler, Fritz Muller, Jochen Winkler, Wolf-Rudiger Karl, Kirsten Fohr
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Publication number: 20030138673Abstract: A composition providing thermal, corrosion, and oxidation protection at high temperatures is based on a synthetic aluminum phosphate, in which the molar content of aluminum is greater than phosphorous. The composition is annealed and is metastable at temperatures up to 1400° C.Type: ApplicationFiled: October 8, 2002Publication date: July 24, 2003Inventors: Sankar Sambasivan, Kimberly A. Steiner
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Patent number: 6596061Abstract: Inorganic anti-corrosive pigments consist of surface-coated solids having a grain size of 0.1 to 75 &mgr;m. In order to improve the resistance of the paints and coatings containing such pigments, firstly Mn3(PO4)2 and secondly aluminium oxides and/or aluminium hydroxides are precipitated onto the solids.Type: GrantFiled: May 4, 2001Date of Patent: July 22, 2003Assignee: Metallgesellschaft AktiengesellschaftInventor: Thomas Rentschler
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Patent number: 6537678Abstract: A non-carcinogenic corrosion inhibiting additive includes an anodic corrosion inhibitor and a cathodic corrosion inhibitor.Type: GrantFiled: September 20, 2000Date of Patent: March 25, 2003Assignee: United Technologies CorporationInventors: John William Putnam, Mark Jaworowski
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Patent number: 6527841Abstract: An aqueous composition for post-treating metal coated substrates such as cadmium-plated steel or zinc-nickel coated substrates and the process for using said composition to improve the corrosion-resistance, abrasion, and adhesion bonding properties of the metal coatings. The composition comprising an acidic aqueous solution having a pH ranging from about 2.5 to 4.5 containing effective amounts of trivalent chromium salts, an alkali metal hexafluorozirconate, at least one alkali metal fluoro-compound, and effective amounts of water soluble thickeners and/or surfactants.Type: GrantFiled: November 6, 2001Date of Patent: March 4, 2003Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig A. Matzdorf, Michael J. Kane, James L. Green, III
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Patent number: 6524403Abstract: A non-chrome containing composition and process are disclosed for enhancing the corrosion resistance of zinc or zinc alloy surfaces. The composition comprises a source of titanium ions or titanates, an oxidant and fluorides or complex fluorides. The composition also preferably comprises an organic acid and/or a Group II metal compound, preferably a Group II metal chloride.Type: GrantFiled: August 23, 2001Date of Patent: February 25, 2003Inventors: Ian Bartlett, Ernest Long, Anthony Rowan
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Patent number: 6521029Abstract: Pretreated aluminum and aluminum alloys and the process for pretreating said aluminum substrates to improve its corrosion-resistance, and adhesion properties which comprises pretreating said aluminums with an effective amount of an acidic aqueous solution having a pH ranging from about 2.5 to 4.5 and comprises effective amounts of a trivalent chromium compound, alkali metal hexafluorozirconates, at least one alkali metal fluoro-compound, and small but effective amounts of water soluble thickeners and/or surfactants.Type: GrantFiled: April 5, 2002Date of Patent: February 18, 2003Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig A Matzdorf, James L. Green, III, Michael J. Kane
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Publication number: 20030026912Abstract: A method, a composition and a method for making the composition for increasing the corrosion resistance of a magnesium or magnesium alloy surface is disclosed. The composition is a water/organic solution of one or more hydrolyzed silanes. By binding silane moieties to the magnesium surface, an anti-corrosion coating on a magnesium workpiece is produced. A complementary method, composition and method for preparing the composition for treating a metal surface to increase corrosion resistance is disclosed. The composition is an aqueous hydrogen fluoride solution with a non-ionic surfactant.Type: ApplicationFiled: June 26, 2002Publication date: February 6, 2003Applicant: ALGAT SHERUTEY GIMUR TEUFATI-KIBBUTZ ALONIMInventor: Ilya Ostrovsky
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Patent number: 6514357Abstract: A composition for metal surface treatment which comprises an aluminum ion, a magnesium ion, a manganese ion, a water-soluble organic resin, an acid and water; and a surface treated metal material which has been treated with the composition. The resultant surface treated metal material is free from the danger of water contamination owing to chromium, since the composition is free of chromium, and also is excellent in both electrical conductivity and corrosion resistance. Accordingly, the metal material can be used in a wide variety of applications in place of a conventional chromate-treated steel sheet and the like.Type: GrantFiled: June 21, 2001Date of Patent: February 4, 2003Assignees: Kawasaki Steel Corporation, Dai Nippon Toryo Co., Ltd.Inventors: Chiyoko Tada, Hiroyuki Ogata, Shigeru Umino
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Patent number: 6511532Abstract: Composition for post-treating anodized aluminum and aluminum alloys and the process for using said composition to improve the corrosion-resistance, abrasion, and adhesion bonding properties of the anodized aluminum and its alloys. The composition comprises an acidic aqueous solution having a pH ranging from about 2.5 to 4.5 containing effective amounts of trivalent chromium salts, alkali metal hexafluorozirconates, an alkali metal fluoro-compound e.g. fluoroborates and/or fluorosilicates, and effective amounts of water soluble thickeners and surfactants.Type: GrantFiled: November 6, 2001Date of Patent: January 28, 2003Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig A. Matzdorf, Michael J. Kane, James L. Green, III
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Patent number: 6509101Abstract: A silane coating (32) is provided which affords non-stick properties to a metal surface (20, 22) of a cooking utensil (10) and which can be provided with colorant (42) to impart a stable color appearance, including white, to the utensil (10). An easy repair method is also described.Type: GrantFiled: December 14, 2000Date of Patent: January 21, 2003Assignee: Aeromet TechnologiesInventor: David C. Fairbourn
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Patent number: 6503305Abstract: A non-toxic chemical composition inhibits corrosion in metal substrates. The composition contains a Phosphorus compound, comprising an acid and a metal selected from the group consisting of an alkali, alkaline earth, or transition metal. The composition also contains a Boron compound comprising an acid and a metal selected from the group consisting of an alkali, alkaline earth, or transition metal. A process of making the chemical composition comprises the steps of filling a mixer with 30-60% by weight of hot water and adding 10-20% by weight of barium carbonate or strontium carbonate, 10-20% by weight of phosphoric acid (75%), 5-15% by weight of lime, and 10-20% by weight of Boric acid; mixing the said contents for 10-15 minutes to create a wet slurry; pouring said wet slurry into an attrition mill for 15-60 minutes; drying said wet slurry and milling said wet slurry to an average particle size of 1.0-2.0 microns to form a dry pigment; pushing said dry pigment through a 325 mesh sieve.Type: GrantFiled: May 18, 2000Date of Patent: January 7, 2003Assignee: Hammond Group, Inc.Inventors: Steve Hodges, Wendy Novelli
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Patent number: 6503304Abstract: A flowable and pumpable aqueous semifinished product of gassing stability for the production of paints and lacquers comprises water, a pre-stabilized metallic pigment and an anticorrosive pigment.Type: GrantFiled: January 16, 2001Date of Patent: January 7, 2003Assignee: ECKART-Werke Standard-Bronzepulver-Werke Carl Eckart GmbH & Co.Inventors: Andreas Korn, Robert Maul
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Publication number: 20030000418Abstract: By including nitric acid and hydroxylamine in a manganese phosphating composition and controlling the ratio of nitric to phosphoric acids and the ratio of Total Acid to Free Acid within a specified range, satisfactory manganese phosphate conversion coatings can be obtained within a reasonable time at temperatures much lower than has previously been thought necessary for operating a manganese phosphating composition with no other metal cations (except possibly for iron).Type: ApplicationFiled: July 26, 2002Publication date: January 2, 2003Inventor: Mervet S. Boulos
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Patent number: 6500276Abstract: The present invention provides a conversion coating solution containing polymetalates and/or heteropolymetalates to oxidize the surface of various metal substrates. The polymetalates have the general formula MxOyn−, where M is selected from the group comprising Mo, V and W. The heteropolymetalates have the general formula BMxOyn−, where B is a heteroatom selected from P, Si, Ce, Mn or Co, and M is again selected from Mo, V, W or combinations thereof. The concentration of polymetalates and/or heteropolymetalates anions is preferably between about 1% and about 5% by weight. Examples of typical anions used include, but are not limited to, (PMo12O40)3−, (PMo10V2O40)5−, (MnPW11O39)5−, (PW12O40)3−, (SiMo12O40)4−, (SiW12O40)4−, (Mo7O24)6−, (CeMo7O24)8−and mixtures thereof.Type: GrantFiled: December 15, 1999Date of Patent: December 31, 2002Assignee: Lynntech Coatings, Ltd.Inventors: Zoran Minevski, Cahit Eylem, Jason Maxey, Carl Nelson
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Patent number: 6485550Abstract: A self-sacrifice type metal corrosion inhibitor is prepared by dispersing one or more kinds of metal powder having a greater ionization tendency than that of a metal to be treated and a water-insoluble thermoplastic resin powder in water containing a water-soluble anticorrosion agent, a surface-active agent and a thickener to from a treatment solution. The treatment solution is applied to the surface of the metal to be treated, which is heated to melt the thermoplastic resin powder and form a thermoplastic resin layer fixed to the surface of the metal. It forms a metal corrosion-inhibiting layer fixed to the surface through the thermoplastic resin, which acts as an adhesive layer.Type: GrantFiled: February 20, 2001Date of Patent: November 26, 2002Assignees: Toyographoile Ltd., Institute of Technology Precision Electric Discharge Work'sInventor: Kunihiko Hirose
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Patent number: 6485580Abstract: An aqueous bath for treating the surfaces of light metals and light metal alloys that does not contain hexavalent chromium or produce any other highly polluting effluent and that forms a highly corrosion-resistant and highly paint-adherent conversion coating has a pH from 1.0 to 7.0 and contains from 0.01 to 50 g/L of permanganic acid and/or salt(s) thereof and 0.01 to 20 g/L of at least one water soluble compound of titanium or zirconium.Type: GrantFiled: November 20, 2000Date of Patent: November 26, 2002Assignee: Henkel CorporationInventors: Kazuya Nakada, Motoki Kawaguchi, Kazuhiro Maeda
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Publication number: 20020168477Abstract: Aqueous zinc-containing coating compositions are provided in which the bonding agent is a blend of sodium and/or potassium silicate and lithium polysilicate the latter being in relatively high proportion particularly over 30% up to 70% by weight of silicate. Preferably the composition contains particulate flaked zinc. The composition is of particular value in enhancing corrosion resistance of articles produced from powdered metal or of non-passivated galvanized artefacts.Type: ApplicationFiled: April 19, 2002Publication date: November 14, 2002Inventor: Ronald R. Savin
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Patent number: 6478886Abstract: Agent for sealing metallic substrates, in particular zinc or zinc alloy substrates, characterized in that it consists of an aqueous dispersion of a) at least one silane derivative and b) a colloidal silica and/or colloidal silicate. This agent may be used for a direct coating of metallic substrates without chromatation.Type: GrantFiled: December 1, 2000Date of Patent: November 12, 2002Assignee: Kunz GmbHInventors: Volker Kunz, Hermann Donsbach, Burkhard Flamme
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Patent number: 6471788Abstract: A method employing oxide film conversion coatings prepared using ferrate (VI) as the oxidizing agent is disclosed. Metal substrates or surfaces, such as aluminum, aluminum alloys or other metals, are contacted with an aqueous solution comprising ferrate (VI) anions to form a corrosion resistant conversion coating on the surface thereof. The ferrate anion concentration is preferably between about 0.0166% and about 1.66% by weight. The coating process is carried out by dipping, spraying, or painting at temperatures ranging from 25° C. to 100° C. for a period of time ranging from about 1 second to about 5 minutes.Type: GrantFiled: December 15, 1999Date of Patent: October 29, 2002Assignee: Lynntech Coatings, Ltd.Inventors: Zoran Minevski, Jason Maxey, Carl Nelson, Cahit Eylem
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Patent number: 6468336Abstract: The present invention relates to novel water-borne shop primer (preconstruction primer) compositions comprising 5-40% by volume of a pigment mixture; 1.4-10% by volume of one or more water soluble silicates (based on the dry volume of the silicate); 40-90% by volume of water; and optionally one or more additives; said pigment mixture comprising 40-90% by weight of zinc, 10-60% by weight of micaceous iron oxide (MIO), and 0-50% by weight of a second filler (e.g. barium sulphate, kaolin, muscovite, quartz, etc.). The present invention also provides a method of using a shop primer composition for temporary protection of a steel surface, and to a method for the manufacture of a steel construction.Type: GrantFiled: May 26, 2000Date of Patent: October 22, 2002Assignee: J.C. Hempel's Skibsfarve-Fabrik A/SInventors: Helle Fiedler, Dorte Jeanette Jensen, Ulla Kirsten Neestrup Hansen, Gruska Elisabeth Folkmann Musaeus
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Publication number: 20020146514Abstract: Disclosed is a coating composition for DACROTIZED™ film comprising Cr-containing inorganic acid, Ni carbonate, reductant, surfactant and water which has excellent corrosion resistance, weather resistance and chemical resistance thus being widely applicable to anticorrosion treatments of metals such as various alloys, sintering metals, and the like.Type: ApplicationFiled: February 6, 2002Publication date: October 10, 2002Inventors: Bum-Goo Chung, Kwang-Wha Hong
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Patent number: 6461415Abstract: A composition providing thermal, corrosion, and oxidation protection at high temperatures is based on a synthetic aluminum phosphate, in which the molar content of aluminum is greater than phosphorous. The composition is annealed and is metastable at temperatures up to 1400° C.Type: GrantFiled: August 23, 2000Date of Patent: October 8, 2002Assignee: Applied Thin Films, Inc.Inventors: Sankar Sambasivan, Kimberly Ann Steiner
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Patent number: 6461449Abstract: Metal surfaces, particularly the zinciferous surfaces of zinc-coated steel, can be given a chromate conversion coating that is superior in terms of blackening resistance and white rust resistance by drying into place on the surfaces a layer of a treatment liquid that contains water, hexavalent chromium atoms, trivalent chromium cations, nitrate ions and one or more types of metal ions selected from the group consisting of Ni, Co, Zn and Al, the molar ratio of the total of these metal ions to nitrate ions being in the range from 0.05 to 1.0, the molar ratio of trivalent chromium ions to hexavalent chromium atoms being in the range of 0.11:1.0 to 1.0:1.0, and the molar ratio of nitrate ions to total chromium atoms being in the range of 2.1 to 5.5. Preferably, the coating formed has a chromium content of 10 to 100 mg/m2.Type: GrantFiled: April 7, 2000Date of Patent: October 8, 2002Assignee: Henkel CorporationInventors: Yuzuru Matsubara, Akira Kato
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Patent number: 6447594Abstract: A process for producing a strontium chromate corrosion inhibitor includes the steps of providing an aqueous slurry containing dispersed particulate strontium chromate, adding to the slurry a phosphoric acid or a neutral or acidic soluble salt of a phosphoric acid selected from the group consisting of ortho-phosphoric, pyro-phosphoric, tri-phosphoric, polyphosphoric, metaphosphoric, polymetaphosphoric, cyclic tri-metaphosphoric acid, and phosphorous acid, and, filtering and drying the resultant material whereby particulate strontium chromate of reduced solubility is produced.Type: GrantFiled: June 13, 2001Date of Patent: September 10, 2002Assignee: Wayne Pigment CorporationInventors: John Sinko, Michael Denesha
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Method of increasing corrosion resistance of metals and alloys by treatment with rare earth elements
Patent number: 6406562Abstract: There is provided a method for treating the surface of metals such as nickel based or high alloy steels, austenitic and ferritic stainless steels, copper and aluminum alloys to increase their corrosion resistance by modification of the metal surfaces to inhibit cathodic corrosion processes. In a single step treatment process the metals are immersed into a heated aqueous composition containing a rare earth salt substantially free of any halide compound. Increased corrosion resistance is obtained using nitrates of yttrium, gadolinium, cerium, europium, terbium, samarium, neodymium, praseodymium, lanthanum, holmium, ytterbium, dysprosium, and erbium nitrates. The rare earth salt is present in the range from about 2% by weight to saturation of the solution. The composition includes a pH-modifying substance such as nitric acid to adjust the pH in the range 0.5 to about 6.5 to attack the surface to remove oxides facilitating deposition of the rare earth.Type: GrantFiled: May 16, 2000Date of Patent: June 18, 2002Assignee: McMaster UniversityInventors: Yucheng Lu, Michael Brian Ives -
Patent number: 6375726Abstract: This invention is for the protection and surface treatment of aluminum, aluminum alloys and coated aluminum substrates against corrosion. The aluminum substrates are treated with an acidic aqueous solution containing small but effective amounts of at least one trivalent chromium salt such as a trivalent chromium sulfate, at least one alkali metal hexafluorazirconate such as potassium hexafluorozirconate in combination with small but effective amounts of at least one water soluble or dispersible thickening agent such as a cellulose compound and at least one water soluble surfactant. The corrosion resistant aluminum substrates of this invention have improved adhesion for overlaying coatings e.g. paints and a lower electrical resistance contact.Type: GrantFiled: October 31, 2000Date of Patent: April 23, 2002Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig Matzdorf, Michael Kane, James Green
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Patent number: 6350474Abstract: The invention deals with phosphate water solution with cold solidification capacity. Phosphate composition containing iron oxide solution in acid, water, advantages from the following properties; it contains orthophosphorus acid and in addition metal powder. Phosphate composition is ecologically pure product, non toxic, non cancerogenic, non-allergic. It has antimicrobial, antivirus and fungicidal properties. Phosphate composition can be applied within medicine: surgery, dermatology, dentistry, oncology, pharmacology and other branches. In agriculture use: as a means of curing plant diseases, within veterinary—as a means for preventive maintenance and curing of animal diseases, within construction—as an anticorrosive, fire-resistant, hydro-electric isolating covers, ceramic tiles, concretes, which protect against radiation, as well as for producing other composite materials.Type: GrantFiled: June 7, 1999Date of Patent: February 26, 2002Inventors: David Dzneladze, Andro Dzneladze, Nargisa Jabishvili
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Patent number: 6315823Abstract: The corrosion resistance of an article having a surface with a primary inorganic coating, such as a conversion coating, over a metal substrate can be improved by treatment of the primary coating with an aqueous liquid sealing composition comprising lithium cations and vanadate anions. This treatment is particularly advantageous for primary coatings formed on aluminum alloys by treating them with a conversion coating forming aqueous composition made by reacting cobalt(II) cations, acetate ions, hydroxyalkyl amines, and peroxides in aqueous solution.Type: GrantFiled: November 16, 1999Date of Patent: November 13, 2001Assignee: Henkel CorporationInventor: Shawn E Dolan
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Publication number: 20010037748Abstract: The present invention has for its object to provide a metallic surface treating agent for PCM use, which is capable of imparting high processability and corrosion resistance to PCM steel panels with the additional advantage of improved storage stability, a method for surface treatment of a PCM steel panel, a method of producing a PCM steel panel, and a PCM steel panel as produced by said method.Type: ApplicationFiled: February 27, 2001Publication date: November 8, 2001Applicant: Nippon Paint Co. Ltd.,Inventors: Toshiaki Shimakura, Motohiro Sasaki, Katsuyoshi Yamasoe, Christian Jung
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Patent number: 6309478Abstract: The disclosure relates to aqueous-based gels and, in some cases, usage of such gels to impart corrosion resistance to steel and/or zinc containing surfaces, e.g., galvanized steel. The gel comprises water, at least one thickener, at least one silica containing material and an optional surfactant.Type: GrantFiled: September 10, 1999Date of Patent: October 30, 2001Assignee: Elisha Technologies Co LLCInventors: Nancy M. McGowan, John Hahn
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Patent number: 6299983Abstract: This invention provides for metal surfaces which when derivatized with &agr;-&ohgr; bis-functionalized substantially linear aliphatic, including fluoroaliphatic acids and metal salts thereof exhibit changes in surface properties. In particular, composites formed from polymers and metallic surfaces derivatized according to a process of the present invention exhibit surprising durability.Type: GrantFiled: November 16, 1998Date of Patent: October 9, 2001Assignee: E. I. du Pont de Nemours and CompanyInventor: John Gregg Van Alsten
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Patent number: 6287704Abstract: 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: March 29, 1999Date of Patent: September 11, 2001Assignee: Surtec Produkte und System fur die Oberflachenbehandlung GmbHInventors: Patricia Preikschat, Rolf Jansen, Peter Hulser
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Patent number: 6287372Abstract: An improved anti-corrosive zinc coating composition for application on a metal substrate is provided. The coating is comprised of a siloxane polymer resin in combination with zinc dust and ceramic microspheres, the microspheres having diameters of 45 microns or less. At this reduced diameter, the microspheres act as spacers for the zinc particles without interfering with the conductivity of the coating, thereby reducing the amount of zinc necessary to achieve cathodic protection of the substrate. The coating is economical to produce, provides excellent corrosion protection, and resists mud-cracking.Type: GrantFiled: March 31, 2000Date of Patent: September 11, 2001Assignee: Themec Company IncorporatedInventors: Remi Briand, Hylen Keith Freeman
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Patent number: 6270884Abstract: There is disclosed a water-reducible, chrome-free coating composition for providing corrosion protection to a substrate, such as a metal substrate. The deposited coating film is corrosion-resistant and, for coated articles which are threaded, e.g., steel fasteners, the coating provides a non-thread-filling coating. The coating composition contains particulate metal, such as particulate zinc or aluminum. Although substituents can be separately packaged, the composition is virtually always a one-package coating composition. The composition is water-based, while also containing low-boiling organic liquid. The composition also contains water-reducible organofunctional silane, particularly an epoxy functional silane, as a binding agent. The composition has highly desirable, extended shelf life. The composition can be easily applied in usual manner, such as dip-drain or dip-spin technique, and readily cures at elevated temperature.Type: GrantFiled: August 2, 1999Date of Patent: August 7, 2001Assignee: Metal Coatings International Inc.Inventors: Donald J. Guhde, Terry E. Dorsett, Etienne Maze, Victor V. Germano, Walter H. Gunn
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Publication number: 20010009130Abstract: A flowable and pumpable aqueous semifinished product of gassing stability for the production of paints and lacquers comprises water, a pre-stabilized metallic pigment and an anticorrosive pigment.Type: ApplicationFiled: January 16, 2001Publication date: July 26, 2001Inventors: Andreas Korn, Robert Maul
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Patent number: 6261355Abstract: A binder adjuvant used in engineering includes in aqueous solution, a mixture of a water-soluble cellulose ether and of an antifoaming agent.Type: GrantFiled: November 16, 1998Date of Patent: July 17, 2001Assignees: Abdelmalek LouhibiInventors: Nizar Al Kassem, Haisan Al Rifai
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Patent number: 6248184Abstract: A process for sealing the surface coating formed by anodizing an aluminum or aluminum alloy substrate (for example, aerospace, commercial, and architectural products), the process including the steps of: (a) providing an aluminum or aluminum alloy substrate with a surface coating formed thereon by anodizing the aluminum or aluminum alloy substrate; (b) providing a sealing solution comprising a dilute solution of a rare earth metal salt selected from the group consisting of cerium salts and yttrium salts; and (c) contacting the substrate with the sealing solution for a sufficient amount of time to seal the surface coating on the substrate. Also disclosed is a chemical sealing solution for sealing the surface coating formed by anodizing an aluminum or aluminum alloy substrate, the solution being a dilute solution of a rare earth metal salt selected from the group consisting of cerium salts and yttrium salts.Type: GrantFiled: May 11, 1998Date of Patent: June 19, 2001Assignees: The Boeing Company, University of Southern CaliforniaInventors: Dennis L. Dull, Florian B. Mansfeld
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Patent number: 6203854Abstract: A method for protecting a metal substrate from corrosion comprises the steps of providing a metal substrate and applying a treatment solution to the surface of the metal substrate, wherein the treatment solution comprises a partially hydrolyzed aminosilane and a fluorine-containing inorganic compound. Preferably the metal substrate is selected from the group consisting of aluminum, aluminum alloys and mixtures thereof.Type: GrantFiled: September 16, 1998Date of Patent: March 20, 2001Assignee: Brent International PLCInventor: John C. Affinito
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Patent number: 6200693Abstract: A chromium-free water-based surface treatment liquid which contains from 0.01 to 50 g/l of a total of dissolved manganic acid, permanganic acid, and salt(s) thereof and from 0.01 to 20 g/l of a total of dissolved titanium compounds and has a pH of from 1.0 to 6.0 reacts rapidly with aluminum and aluminum alloy surfaces to deposit thereon a protective coating that does not contain hexavalent chromium and has excellent corrosion resistance and paint film holding properties.Type: GrantFiled: November 22, 1999Date of Patent: March 13, 2001Assignee: Henkel CorporationInventors: Kazuya Nakada, Motoki Kawaguchi, Kazuhiro Maeda
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Patent number: 6200672Abstract: A surface treated metal sheet which is coated with a layer comprising, as main components, a complex and/or salt between a rare earth metal element and an organic compound having in the molecule one or more functional groups selected from among —O—, ═O, —OH, —COOH, —NH2, ═NH, ═N—, —SH, —SO3H and phosphoric groups, and a matrix which physically holds the above and has adhesive power for metal sheets, as well as a metal surface treatment solution used therefor.Type: GrantFiled: October 13, 1999Date of Patent: March 13, 2001Assignee: Nippon Steel CorporationInventors: Kenichiro Tadokoro, Hiromasa Shoji, Masao Sakashita