METHOD FOR REGULATING SURFACE OF ZN-AL ALLOY PLATED STEEL SHEET IN COATING TYPE CHROMATE TREATMENT

PURPOSE:To reduce the generation of sludge at the time of treating a Zn-Al alloy plated steel sheet by treatment by an Ni ion acidic soln. to be subjected before coating type chromate treatment. CONSTITUTION:In the treating method in which a Zn-Al alloy plated steel sheet is treated by an acidic aq....

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Bibliographische Detailangaben
Hauptverfasser:	FUKUMOTO HIROMITSU, MIZUKI HISAMITSU, YOSHINO MASAHIRO, YOKOYAMA MASATOSHI, YOSHIDA YUICHI, MORIMOTO MASATAKA
Format:	Patent
Sprache:	eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	PURPOSE:To reduce the generation of sludge at the time of treating a Zn-Al alloy plated steel sheet by treatment by an Ni ion acidic soln. to be subjected before coating type chromate treatment. CONSTITUTION:In the treating method in which a Zn-Al alloy plated steel sheet is treated by an acidic aq. soln. contg. Ni ions to regulate its surface, and after that, it is coated with a coating type chromate treating soln., in the process of the treatment by the acidic aq. soln. contg. Ni ions, the above aq. soln. is fed with hydrofluoric acid.