Title:
TIN-ELECTROPLATED STEEL PLATE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/061395
Kind Code:
A1
Abstract:
Disclosed is a tin-electroplated steel plate, comprising a tin-plated steel plate and a passivation film. The tin-plated steel plate comprises a steel substrate and a tin plating; the tin plating covers the surface of the steel substrate; the tin plating comprises a pure tin layer and a tin-iron alloy transition layer between the pure tin layer and the steel substrate; the surface of the tin plating is covered with the passivation film; a chromium content in the passivation film is 3.5-36 mg/m2; the chromium content comprises a metal chromium content and a chromium oxide content. Also disclosed is a passivation treatment solution, used for forming the passivation film in the tin-electroplated steel plate. A solvent of the passivation treatment solution is water. The passivation treatment solution contains: chromic anhydride having a concentration of 20-180 g/L; and an additive selected from the group consisting of: sulfuric acid having a concentration of 0.2-0.8 g/L, sodium sulfate having a concentration of 0.5-3.5 g/L, fluosilicic acid having a concentration of 0.8-2.5 g/L, and sodium fluosilicate having a concentration of 1.5-6.5 g/L. In addition, further disclosed is a method for manufacturing the tin-electroplated steel plate.
Inventors:
WEI JUNSHENG (CN)
LI XIUJUN (CN)
LAN JIAN (CN)
LI PENG (CN)
WANG ZHANGWEI (CN)
CHEN HONGXING (CN)
MIAO FUJUN (CN)
LI XIUJUN (CN)
LAN JIAN (CN)
LI PENG (CN)
WANG ZHANGWEI (CN)
CHEN HONGXING (CN)
MIAO FUJUN (CN)
Application Number:
PCT/CN2022/124792
Publication Date:
April 20, 2023
Filing Date:
October 12, 2022
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C25D3/30; C25D5/48
Foreign References:
| CN110885999A | 2020-03-17 | |||
| AU3459478A | 1979-10-04 | |||
| CN108796584A | 2018-11-13 | |||
| CN112538591A | 2021-03-23 |
Other References:
XU JIAOJIAO, WANG MINGHAO;LI NING: "Chemical Composition of the Passivation Film on the Tinplate and Optimization of the Passivation Process", PLATING & FINISHING, vol. 40, no. 11, 15 November 2018 (2018-11-15), pages 10 - 16, XP093057579, ISSN: 1001-3849, DOI: 10.3969/j.issn.1001@BULLET3849.2018.11.003
Attorney, Agent or Firm:
WATSON & BAND INTELLECTUAL PROPERTY AGENT LTD. (CN)
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