| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface treatment agent which inexpensively imparts excellent corrosion resistance to a zinc or zinc alloy product. SOLUTION: The surface treatment agent for the zinc or zinc alloy product includes at least one water-soluble compound containing antimony, bismuth, tellurium or tin. The agent preferably further includes a nickel salt and/or a manganese salt, and more preferably further includes tannins and/or thioureas. The surface treatment method preferably comprises the steps of: immersing the zinc or a zinc alloy product into an aqueous solution containing any of the surface treatment agents; and subsequently immersing the zinc or zinc alloy product into an aqueous solution containing a sealing agent selected in accordance with color tones of the zinc or the zinc alloy product to seal the pin hole. COPYRIGHT: (C)2006,JPO&NCIPI
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