PROCESSING SOLUTION FOR GENERATING BLACK CHEMICAL FILM, METHOD OF PROCESSING METALLIC MEMBER THEREBY, AND PROCESSED METALLIC MEMBER

• Main Authors: MORITA AKIO, TAZONO YUSAKU, HORIE HIDEKAZU
• Format: Patent
• Language: English
• Published: 23.02.2012
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

PROBLEM TO BE SOLVED: To provide a method for forming a non-chromium black chemical film having excellent corrosion resistance and uniform appearance of a metallic member formed of zinc or a zinc alloy with a single processing solution.SOLUTION: A black chemical film is formed on the metallic member with the single processing solution by using a processing solution for generating a black chemical film containing a vanadium compound (A), an organic sulfur compound (B), and at least one (C) to be selected among the group composed of chlorine ions, fluorine ions, nitric acid ions, sulfuric acid ions, acetate ions and boron ions, and no chromium (D).