Zn-Ni based composite electroplated steel sheet and multi-layer

Details Zn-Ni based composite electroplated steel sheet and multi-layer Zn-Ni based composite electroplated steel sheet and multi-layer

1989-09-11

1991-01-15

Rosenberg, Peter D.

Stock material or miscellaneous articles

All metal or with adjacent metals

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

423121, B21D 3900

Patent

active

049853112

ABSTRACT:
Disclosed is a Zn-Ni based composite plated steel sheet excellent in corrosion resistance and workability which comprises a ferrous substrate and, provided thereon, a Zn-Ni based composite electroplating layer comprising 1-15% by weight of Ni, 0.1-10% by weight of Cr, 0.1-10% by weight of SiO.sub.2, 0.01-3% by weight of Fe and the balance being essentially Zn. This steel sheet may further have a Zn or Zn based alloy electroplating upper layer to further improve corrosion resistance after coating. Furthermore, in order to remarkably improve corrosion resistance, the steel sheet may further have a hardly soluble chromate film layer of 10-150 mg/m.sup.2 in total Cr content and an epoxy resin thin film layer containing agglomerated SiO.sub.2 provided on said chromate film layer.

REFERENCES:
patent: 4495008 (1985-01-01), Bruno
patent: 4617179 (1986-10-01), Veyrier
Derwent Abstract No. 87-099046/14.
Derwent Abstract No. 87-105923/15.
Derwent Abstract No. 85-220516/36.

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