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US 2026/0159956 A1Published application
Solution composition for surface treatment of steel sheet, steel sheet surface-treated using same, and manufacturing method therefor
AssigneesPosco, Unicoh Specialty Chemicals Co., Ltd.
InventorsChang-Hoon Choi, Jong-Kook Kim, Soo-Hyoun Cho, Ho-Cheol Song
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Abstract
The present invention relates to: a solution composition capable of improving corrosion-resistance and blackening-resistance of a steel sheet; sheet surface-treated using same; and a method for manufacturing the steel sheet.
Claims14
A solution composition for a surface treatment of a steel sheet, the solution composition comprising:
- (a) 0.1 to 10 wt % of trivalent chromium compound,
- (b) 0.1 to 10 wt % of acidity regulator,
- (c) 1 to 20 wt % of adhesion improver,
- (d) 1 to 15 wt % of corrosion resistance improver,
- (e) 0.1 to 25 wt % of film former,
- (f) 0.01 to 2 wt % of lubricant,
- (g) 0.5 to 10 wt % of co-solvent, and
- (h) a residual solvent.
5 more elements
Dependencies are inferred from the claim text.