HIGHLY CORROSION-RESISTANT, SURFACE-TREATED STEEL SHEET

Title:

HIGHLY CORROSION-RESISTANT, SURFACE-TREATED STEEL SHEET

Document Type and Number:

WIPO Patent Application WO/1988/006521

Kind Code:

A1

Abstract:

A highly corrosion-resistant, surface-treated steel sheet which has in order a zinc or zinc alloy deposit as an undercoating deposit, a chromate coating, and a coating of resin composition comprising a base resin obtained by adding at least one basic nitrogen atom and at least two primary hydroxy groups to the terminal of an epoxy resin, silica, and a difficultly soluble chromium compound. This resin composition has predetermined weight ratios of base resin/silica, base resin/difficultly soluble chromium compound, base resin/(silica + difficultly soluble chromium compound), and silica/difficultly soluble compound. The coating of this resin composition may contain a polyisocyanate compound as a hardener and further a silane compound as a crosslinking agent between the base resin and silica.

Inventors:

ADANIYA TAKESHI (JP)
YAMASHITA MASAAKI (JP)
KUBOTA TAKAHIRO (JP)
ENATSU AKIRA (JP)
NIKAIDO NORIO (JP)
MIYOSAWA YOSHIAKI (JP)
NISHIMOTO TADASHI (JP)
OZAWA KAZUHIKO (JP)

Application Number:

PCT/JP1988/000233

Publication Date:

September 07, 1988

Filing Date:

March 02, 1988

Export Citation:

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Assignee:

NIPPON KOKAN KK (JP)
KANSAI PAINT CO LTD (JP)

International Classes:

B32B15/08; C08G18/64; C08G59/40; C09D5/08; C09D163/00; C09D175/12; C23C22/83; C25D13/00; (IPC1-7): B32B15/08; C09D3/58; C12D13/00

Foreign References:

JPS5914942A	1984-01-25
JPS59159335A	1984-09-08
JPS488314A

Other References: