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US 11,753,737 B2Granted
Surface-treated steel sheet, metal container, and method for producing surface-treated steel sheet
AssigneeToyo Kohan Co., Ltd.
InventorsKunihiro Yoshimura, Masanobu Matsubara, Marie Sasaki, Akihiro Yoshida, Kenji Yanada, Munemitsu Hirotsu
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Abstract
There is provided a surface-treated steel sheet (1) comprising: a tin-plated steel sheet (10) obtained by tin-plating a steel sheet (11); a phosphate compound layer (20) containing tin phosphate formed on the tin-plated steel sheet (10); and an aluminum-oxygen compound layer (30) formed on the phosphate compound layer (20), a main constituent of the aluminum-oxygen compound layer being an aluminum-oxygen compound.
Claims4
A method for producing a surface-treated steel sheet comprising:
- forming a phosphate compound layer on a tin-plated steel sheet by means of an anode electrolytic treatment, wherein the tin-plated steel sheet is obtained by tin-plating a steel sheet;
- and
- forming an aluminum-oxygen compound layer on the phosphate compound layer by means of an electrolytic treatment using an electrolytic treatment liquid containing aluminum.
Dependencies are inferred from the claim text.