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FINISHING AGENT FOR TRIVALENT CHROMIUM CHEMICAL CONVERSION COATING FILM, AND METHOD FOR FINISHING BLACK TRIVALENT CHROMIUM CHEMICAL CONVERSION COATING FILM.
FINISHING AGENT FOR TRIVALENT CHROMIUM CHEMICAL CONVERSION COATING FILM, AND METHOD FOR FINISHING BLACK TRIVALENT CHROMIUM CHEMICAL CONVERSION COATING FILM.
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机译:三价铬化学转化膜的涂饰剂和黑色三价铬化学转化膜的涂饰方法。
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摘要
The purpose of the present invention is to provide a water-soluble finishing agent for a trivalent chromium chemical conversion coating film, which has low insulation, no problems with tightening properties, outstanding gloss and high corrosion resistance, and can obtain a trivalent chromium chemical conversion coating film, especially a black trivalent chromium chemical conversion coating film, having few scratches and flaws. The finishing agent for a trivalent chromium chemical conversion coating film is characterized by containing a trivalent chromium source, a phosphate ion source, a zinc ion source, a chelating agent which can form a complex with trivalent chromium, and a non-ionic water-soluble polymer compound selected from a group comprising poly(vinyl alcohol) and derivatives thereof, poly(vinyl pyrrolidone) and derivatives thereof, poly(alkylene glycol)s and derivatives thereof, and cellulose ethers and derivatives thereof.
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