Highly corrosion-resistant, colored thin film-coated steel sheet

Details Highly corrosion-resistant, colored thin film-coated steel sheet Highly corrosion-resistant, colored thin film-coated steel sheet

1990-04-04

1991-10-22

Dean, R.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428623, 428624, B32B 1504, B32B 1508, B32B 1518, B32B 1710

Patent

active

050594923

ABSTRACT:
This invention provides a highly corrosion-resistant, colored thin film-coated steel sheet having excellent press-processability and spot-weldability, which comprises a plated steel sheet, a first layer of a sparingly soluble chromate film formed on surface(s) of the plated steel sheet and having a water soluble content of 1 to 30%, a Cr.sup.6+ /Cr.sup.3+ ratio of 0.01 to 1.0 and a total chromium build-up of 10 to 150 mg/m.sup.2 on one surface, and a second layer of a 0.3 to 5 .mu. thick solid coating film formed of an organic solvent-type coating composition, the solid coating film being comprised, based on the weight of the nonvolatile content, of

REFERENCES:
patent: 3999957 (1976-12-01), Tongyai
patent: 4876160 (1989-10-01), Shindou et al.

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