| 摘要 |
The present invention provides a method for forming a colored oxide film layer on the surface of an article made of iron or a non-iron metal, by subjecting a nickel plating or chrome plating layer formed on the surface of the article to oxidizing heat treatment, in order to impart high corrosion resistance and a variety of vivid colors to the article. The method for forming a colored oxide film layer according to the present invention comprises the steps of: (a) subjecting an article made of iron or a non-iron metal to nickel plating or chrome plating; and (b) subjecting the article thus treated in step (a) to oxidizing heat treatment in an oxidizing atmosphere at 200 to 500° C. for 1 minute to 20 hours, to form a colored oxide film layer on the surface of the plating layer.
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