# US 8,784,629 B2 · Method of producing surface-treated metal material and method of producing coated metal item > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,629 B2 - Document ID: US8784629B2 - Status: Granted - Kind: B2 - Application number: 12/679,048 - Filed: 2008-09-26 - Published: 2010-09-30 - Granted: 2014-07-22 - Earliest claimed: 2007-09-27 - Assignees: Chemetall GmbH - Applicants: Toshio Inbe; Hiroshi Kameda; Thomas Kolberg - Inventors: Toshio Inbe; Hiroshi Kameda; Thomas Kolberg - Web page: https://patentgrep.com/patent/US8784629B2 ## CPC - C23C 22/361: {containing titanium, zirconium or hafnium compounds} - C09D 5/4488: {Cathodic paints (C09D5/4403 - C09D5/4476 take precedence)} - C23C 22/34: containing fluorides or complex fluorides - C23C 22/83: Chemical after-treatment - C25D 13/04: with organic material - C23C 2222/20: Use of solutions containing silanes - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C25D: PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR ## Abstract A method of producing a surface-treated metal material, comprising: surface treating a metal material using a treatment liquid (1), which comprises from 10 to 10,000 ppm of tin ions and has a pH of 1.0 or greater, and subjecting the metal material that has undergone surface treatment with the treatment liquid (1) to an additional chemical conversion treatment using a treatment liquid (2), which comprises zirconium ions and/or titanium ions. ## Claims ### Claim 1 A method of producing a surface-treated metal material, comprising: surface treating a metal material using a treatment liquid (1), which comprises from 10 to 10,000 ppm of tin ions and has a pH of 1.0 or greater, to form a first layer; and subjecting the metal material that has undergone surface treatment with the treatment liquid (1) to an additional chemical conversion treatment using a treatment liquid (2), which comprises tin ions and further comprises zirconium ions and/or titanium ions, wherein the chemical conversion treatment using treatment liquid (2) forms a uniform metal oxide film. ### Claim 2 (depends on 1) The method of producing a surface-treated metal material according to claim 1, wherein the pH of the treatment liquid (1) is within a range from 1.0 to 5.5. ### Claim 3 (depends on 1) The method of producing a surface-treated metal material according to claim 1, wherein the treatment liquid (1) further comprises at least one of a surfactant and a rustproofing agent. ### Claim 4 (depends on 1) The method of producing a surface-treated metal material according to claim 1, wherein the treatment liquid (2) further comprises a polyamine compound. ### Claim 5 (depends on 4) The method of producing a surface-treated metal material according to claim 4, wherein the polyamine compound incorporated within the treatment liquid (2) is an organosiloxane obtained by subjecting an amino group-containing silane to a polycondensation. ### Claim 6 (depends on 1) The method according to claim 1, wherein the additional chemical conversion treatment comprises electrolytic treatment using the metal material as a cathode. ### Claim 7 (depends on 1) The method according to claim 1, wherein the treatment liquid (2) further comprises aluminum ions and/or indium ions. ### Claim 8 (depends on 1) The method according to claim 1, wherein the elemental ratio between zirconium and/or titanium and tin within the obtained metal oxide film is within a range from 1/10 to 10/1. ### Claim 9 A method of producing a coated metal item, comprising: surface treating a metal material using a treatment liquid (1), which comprises from 10 to 10,000 ppm of tin ions and has a pH of 1.0 or greater, to form a first layer; subjecting the metal material that has undergone surface treatment with the treatment liquid (1) to an additional chemical conversion treatment using a treatment liquid (2), which comprises tin ions and further comprises zirconium ions and/or titanium ions, to form a metal oxide film of uniform thickness; and forming on the metal material that has undergone chemical conversion treatment with the treatment liquid (2) a coating film by cationic electrodeposition coating. ### Claim 10 (depends on 9) The method of producing a coated metal item according to claim 9, wherein the treatment liquid (2) further comprises a polyamine compound. ### Claim 11 A method of producing a surface-treated metal material, comprising: surface treating a metal material using a treatment liquid (1), which comprises from 10 to 10,000 ppm of tin ions and has a pH of 1.0 or greater; and subjecting the metal material that has undergone surface treatment with the treatment liquid (1) to an additional chemical conversion treatment using a treatment liquid (2), which comprises tin ions and further comprises from 10 to 10,000 ppm of zirconium ions and/or titanium ions to form a uniform metal oxide layer, and wherein a ratio of the tin ion concentration within the treatment liquid (1) relative to the concentration of the zirconium and/or titanium ions within the treatment liquid (2) is within a range of from 0.005 to 1. ### Claim 12 A method of producing a coated metal item, comprising: surface treating a metal material using a treatment liquid (1), which comprises from 10 to 10,000 ppm of tin ions and has a pH of 1.0 or greater; subjecting the metal material that has undergone surface treatment with the treatment liquid (1) to an electrolytic treatment using: a treatment liquid (2), which comprises tin ions and further comprises zirconium ions and/or titanium ions, and the metal material as a cathode; and forming on the metal material that has undergone chemical conversion treatment with the treatment liquid (2) a coating film by cationic electrodeposition coating.