Steel product with plating layers
First Claim
Patent Images
1. A plated steel product comprising:
- a base member made of steel;
a Ni plating layer formed over a surface of the base member;
a Cu plating layer formed on the Ni plating layer; and
a Zn—
Ni alloy plating layer formed on the Cu plating layer.
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Accused Products
Abstract
A Ni plating layer 3, a Cu plating layer 11, a Zn—Ni alloy plating layer 4 and a chromate layer 5 are formed sequentially in that order on the outer surface of a steel base 2. The Cu plating layer 11 interposed between the Ni plating layer and the Zn—Ni plating layer seals up pinholes in the Ni plating layer and enhances the sacrificial corroding action of the Zn—Ni alloy plating layer.
11 Citations
6 Claims
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1. A plated steel product comprising:
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a base member made of steel;
a Ni plating layer formed over a surface of the base member;
a Cu plating layer formed on the Ni plating layer; and
a Zn—
Ni alloy plating layer formed on the Cu plating layer.- View Dependent Claims (2, 3, 4, 5, 6)
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Specification