Surface treatment of aquo-metal containing no sexavalence chromium and its treated metal plate for surface treatment
A technology of metal surface treatment and water system, which is applied in the direction of metal material coating process, etc., can solve the problems of poor conductivity and so on
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[0012] The water-based metal surface treatment agent of the present invention contains component (A) trivalent chromium compound, but does not contain hexavalent chromium compound, and the trivalent chromium compound is not particularly limited, chromium (III) sulfate, chromium (III) nitrate, diphosphoric acid Chromium (III), chromium (III) fluoride, chromium (III) halide, etc. are all available, and even trivalent chromium that has been completely reduced from hexavalent chromium is used without hindrance. The compounding quantity of the component (A) in the aqueous metal surface treatment agent of this invention is not specifically limited.
[0013] Although the metal in the component (B) metal nitrate salt used in the present invention is not particularly limited, at least one selected from the group consisting of alkaline earth metals such as magnesium, calcium, and barium, and cobalt, nickel, iron, zirconium, and titanium One kind of metal is more suitable; the compoundin...
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