| 摘要 |
A zinc surface on a metal artifact may be colorized and rendered corrosion resistant by applying to the surface a solution of a trivalent chromium compound, plus at least one added metal salt selected from the group consisting of ferrous salts, nickel salts and cobalt salts capable of coloring the surface, along with the chromium compound in the presence of a phosphate at a pH of about 0.5 to 5, to provide a colored surface. Then, a top coat is provided to the colored surface, to achieve high corrosion resistance.
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