Highly corrosion-resistant, multi-layer coated steel sheets

Details Highly corrosion-resistant, multi-layer coated steel sheets Highly corrosion-resistant, multi-layer coated steel sheets

1988-03-01

1990-11-13

Morris, Theodore

Stock material or miscellaneous articles

All metal or with adjacent metals

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

428626, 428632, 428633, 428659, B32B 1504

Patent

active

049701266

ABSTRACT:
This invention relates to a highly corrosion-resistant, multi-layer coated steel sheet, and includes an undercoat film obtained by galvanization or zinc-alloy plating and a chromate coated film thereon, on which a resin-composition film is further applied, comprising an organic high-molecular weight resin having a glass transision temperature of 343.degree. to 423.degree. K. and soluble in organic solvent and hydrophobic silica.
For the purpose of improvement of corrosion preventiveness, a sparingly water soluble Cr compound may be contained in this resin composition film. Together with this sparingly water soluble Cr compound, a di- or tri-alkoxysilane compound may be also contained in the resin composition film.

REFERENCES:
patent: 4411964 (1983-10-01), Hara et al.
patent: 4659394 (1987-04-01), Hara et al.
patent: 4775600 (1988-09-01), Adaniya et al.

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