Kenyon & Kenyon LLP
Aqueous treating solution for Sn-based plated steel sheet excellent in corrosion resistance and paint adhesion, and production method of surface-treated steel sheet
An aqueous treating solution for an Sn-based plated steel sheet, comprising (A) an organic material, (B) a water-soluble chromium compound, (C) a water-dispersible silica, and water, wherein the organic material (A) is at least one member selected from an oxy-acid with the ratio of hydroxyl group/carboxyl group in one molecule being from 3/1 to 10/1, its lactone form and an oxide derivative thereof, the water-soluble chromium compound (B) does not contain hexavalent chromium, and pH is from 0.7 to 6.0.
Nippon Steel Corporation
C C C C C
C23C C23C C23C C23C C23C
inventional inventional additional inventional inventional
Yasuto Shinichi Kensuke Masao Manabu Takumi
Goto Yamaguchi Mizuno Kurosaki Kumagai Kozaki