METHOD FOR DIRECTLY ELECTROPLATING ALUMINUM STRIP WITH ZINC

PURPOSE:To rapidly and continuously form a Zn-based electroplating film excellent in adhesion by degreasing an aluminum strip with alkali, pickling the strip and then electroplating the strip in an acidic zinc-based plating bath contg. Ni or Fe ion. CONSTITUTION:An aluminum strip is degreased with a...

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Bibliographische Detailangaben
Hauptverfasser:	OISHI MASAYUKI, HOBO YOSHIHIKO, UEDA NAOTAKA, TSUJI MASANORI, FUJITA KAZUYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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Beschreibung
Zusammenfassung:	PURPOSE:To rapidly and continuously form a Zn-based electroplating film excellent in adhesion by degreasing an aluminum strip with alkali, pickling the strip and then electroplating the strip in an acidic zinc-based plating bath contg. Ni or Fe ion. CONSTITUTION:An aluminum strip is degreased with alkali, pickled and then electroplated in an acidic zinc-based plating bath contg. >=10g/l of Ni and/or Fe. Alternatively, the plating amt. is controlled to 1-10mg/m in this case, and then the strip is coated with an upper zinc-based plating in another zinc- based plating bath. Consequently, a zinc-based electroplating film excellent in adhesion is formed on the strip at high current density and at a high rate.