# US 7,608,337 B2 · Chemical conversion-treated metal plate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,608,337 B2 - Document ID: US7608337B2 - Status: Granted - Kind: B2 - Application number: 10/579,372 - Filed: 2004-11-18 - Published: 2007-02-08 - Granted: 2009-10-27 - Earliest claimed: 2003-11-18 - Assignees: Nippon Steel Corporation - Inventors: Koki Tanaka; Masao Kimura; Hiromasa Shoji; Hiromasa Nomura - Web page: https://patentgrep.com/patent/US7608337B2 ## CPC - C23C 22/34: containing fluorides or complex fluorides - 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) ## Abstract To provide a chemical conversion-treated metal sheet excellent in the corrosion resistance and coating adhesion, free from elution of chromium oxide and small in the environmental load, there is provided a chemical conversion-treated metal sheet comprising a metal sheet having on at least one surface thereof an inorganic film, wherein the inorganic film is a film comprising as a main component one or both of a metal oxide and a metal hydroxide exclusive of Cr and the film contains F. ## Claims ### Claim 1 A chemical conversion-treated metal sheet comprising a metal sheet having on at least one surface thereof an inorganic film, wherein said inorganic film is a film having a metal component, said inorganic film comprising one or both of a metal oxide and a metal hydroxide, and said film containing F bonded to the metal of the metal component, said film containing no Cr, said one or both of said metal oxide and metal hydroxide comprising 50 atom % or more of all atoms in said film after subtracting all said F atoms from said film, and F content in said film is from 1 atom % to less than 60 atom % based on all atoms in said film; and at least a part of the metal component of said film has both a chemical bond to O and a chemical bond to F. ### Claim 2 (depends on 1) The chemical conversion-treated metal sheet as claimed in claim 1, wherein the content of said one or both of said metal oxide and said metal hydroxide is 80 atom % or more of all atoms in said film after subtracting all F atoms from said film. ### Claim 3 (depends on 1) The chemical conversion-treated metal sheet as claimed in claim 1, wherein the content of said one or both of said metal oxide and said metal hydroxide is 90 atom % or more of all atoms in said film after subtracting all F atoms from said film. ### Claim 4 (depends on 1) The chemical conversion-treated metal sheet as claimed in claim 1, wherein the content of F in said film is from 3 atom % to 35 atom % based on all atoms in said film. ### Claim 5 (depends on 1) The chemical conversion-treated metal sheet as claimed in claim 1, wherein the content of F in said film is from 5 atom % to 30 atom % based on all atoms in said film. ### Claim 6 (depends on 1) The chemical conversion-treated metal sheet as claimed in claim 1, wherein the metal component of said film is one or more member selected from the group consisting of Ti, Zr and Si. ### Claim 7 (depends on 6) The chemical conversion-treated metal sheet as claimed in claim 6, wherein said film further contains, as an additional element, one or more element selected from the group consisting of Mg, Al, Zn, Ni and Co. ### Claim 8 (depends on 7) The chemical conversion-treated metal sheet as claimed in claim 7, wherein the content of the additional element in said film is such that the Zn content is from 0.1 atom % to less than 50 atom % based on all atoms in said film. ### Claim 9 (depends on 7) The chemical conversion-treated metal sheet as claimed in claim 7, wherein the content of the additional element in said film is such that the Al content is from 1 atom % to less than 30 atom % based on all atoms in said film. ### Claim 10 (depends on 7) The chemical conversion-treated metal sheet as claimed in claim 7, wherein the content of the additional element in said film is such that the Mg content is from 1 atom % to less than 30 atom % based on all atoms in said film. ### Claim 11 (depends on 7) The chemical conversion-treated metal sheet as claimed in claim 7, wherein the content of the additional element in said film is such that the Ni content is from 1 atom % to less than 30 atom % based on all atoms in said film. ### Claim 12 (depends on 7) The chemical conversion-treated metal sheet as claimed in claim 7, wherein the content of the additional element in said film is such that the Co content is from 1 atom % to less than 30 atom % based on all atoms in said film. ### Claim 13 (depends on 7) The chemical conversion-treated metal sheet as claimed in claim 7, wherein each additional element in said film has a bond to O or F or both a bond to O and a bond to F.