# US 2020/0399765 A1 · Sn-plated steel sheet and method for manufacturing sn-plated steel sheet > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399765 A1 - Document ID: US20200399765A1 - Status: Published application - Kind: A1 - Application number: 16/975,637 - Filed: 2019-03-01 - Published: 2020-12-24 - Earliest claimed: 2018-03-01 - Assignees: Nippon Steel Corporation - Applicants: Nippon Steel Corporation - Inventors: Shintaro YAMANAKA; Masakazu NODA; Yasuhiko SATO; Nobuo NAKASONE - Web page: https://patentgrep.com/patent/US20200399765A1 ## CPC - C23C 28/3455: {with a refractory ceramic layer, e.g. refractory metal oxide, ZrO2, rare earth oxides or a thermal barrier system comprising at least one refractory oxide layer} - B32B 15/04: comprising metal as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042)} - B32B 15/043: {of metal (B32B15/01 takes precedence)} - B32B 15/18: comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)} - C23C 22/05: using aqueous solutions - C23C 22/36: containing also phosphates - C23C 22/361: {containing titanium, zirconium or hafnium compounds} - C23C 28/30: {Coatings combining at least one metallic layer and at least one inorganic non-metallic layer} - C23C 28/32: {including at least one pure metallic layer} - C23C 28/321: {with at least one metal alloy layer} - C23C 28/322: {only coatings of metal elements only} - C23C 28/34: {including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates} - C23C 28/345: {with at least one oxide layer} - C23C 30/00: Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence) - C23C 30/005: {on hard metal substrates} - C25D 5/48: After-treatment of electroplated surfaces - C25D 5/50: by heat-treatment - C25D 9/00: Electrolytic coating other than with metals (C25D11/00, C25D15/00 take precedence; electrophoretic coating C25D13/00) - C25D 9/08: by cathodic processes - C25D 9/10: on iron or steel - C23C 22/34: containing fluorides or complex fluorides - C25D 3/30: of tin - C25D 5/36: of iron or steel - C25D 5/505: {of electroplated tin coatings, e.g. by melting} - Y10T 428/12583: Component contains compound of adjacent metal - Y10T 428/1259: Oxide - Y10T 428/12611: Oxide-containing component - Y10T 428/12618: Plural oxides - Y10T 428/12667: Oxide of transition metal or Al - Y10T 428/12708: Sn-base component - Y10T 428/12722: Next to Group VIII metal-base component - Y10T 428/12951: Fe-base component - Y10T 428/12972: Containing 0.01-1.7% carbon [i.e., steel] - Y10T 428/12979: Containing more than 10% nonferrous elements [e.g., high alloy, stainless] - 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) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C25D: PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract This Sn-plated steel sheet includes: a base plated steel sheet having a steel sheet, and a Sn-plated layer on at least one surface of the steel sheet; and a film layer which contains a zirconium oxide and a tin oxide and is positioned on the base plated steel sheet. An adhesion amount of Sn per surface of the Sn-plated steel sheet is 0.1 g/m2 or more and 15 g/m2 or less, an amount of the zirconium oxide in the film layer is in a range of 1 mg/m2 or more and 30 mg/m2 or less in terms of an amount of metal Zr, a peak position of a binding energy of Sn3d5/2 of the tin oxide by X-ray photoelectron spectroscopy in the film layer is within a range of 1.4 eV or more and less than 1.6 eV from a peak position of a binding energy of metal Sn, and a quantity of electricity required for reduction of the tin oxide is in a range of more than 5.0 mC/cm2 and 20 mC/cm2 or less. ## Claims ### Claim 1 A Sn-plated steel sheet, comprising: a base plated steel sheet having a steel sheet, and a Sn-plated layer on at least one surface of the steel sheet; and a film layer which contains a zirconium oxide and a tin oxide and is positioned on the base plated steel sheet, wherein an adhesion amount of Sn per surface is 0.1 g/m2 or more and 15 g/m2 or less, an amount of the zirconium oxide in the film layer is in a range of 1 mg/m2 or more and 30 mg/m2 or less in terms of an amount of metal Zr, a peak position of a binding energy of Sn3d5/2 of the tin oxide by X-ray photoelectron spectroscopy in the film layer is within a range of 1.4 eV or more and less than 1.6 eV from a peak position of a binding energy of metal Sn, and a quantity of electricity required for reduction of the tin oxide is in a range of more than 5.0 mC/cm2 and 20 mC/cm2 or less. ### Claim 2 A method for manufacturing a Sn-plated steel sheet, comprising: a first step of forming a zirconium oxide layer containing a zirconium oxide on a base plated steel sheet which has a Sn-plated layer containing 0.1 g/m2 or more and 15 g/m2 or less of Sn formed on at least one surface of a steel sheet, by performing an immersion treatment into a solution containing zirconium ions, or a cathodic electrolysis treatment in a solution containing zirconium ions; and a second step of, after the first step, subjecting the base plated steel sheet on which the zirconium oxide layer is formed to a heating treatment in an atmosphere containing oxygen under conditions satisfying both Formula 1 and Formula 2 regarding a heating temperature T in units of K and a heating time t in units of hours 0.11×exp(2400/T)