Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Coating moving substrate
Patent
1990-05-07
1993-08-17
Tufariello, T. M.
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Coating moving substrate
204207, C25D 706
Patent
active
052365743
ABSTRACT:
A continuous multi-layer plating line for steel sheet which includes a hot-galvanizing apparatus to form a galvanized coating and optionally to alloy the coating and an electroplating apparatus to form an electroplated coating on the galvanized coating. Between the hot-galvanizing apparatus and the electroplating apparatus, a post-galvanizing surface treatment apparatus effective for removing surface oxide contaminants and activating the surface of the galvanized coating is disposed and the galvanized steel sheet is treated thereby prior to electroplating. The post-galvanizing surface treatment may be carried out by applying an alkali solution or an acid which can dissolve aluminum oxide to the galvanized coating, by alkali electrolysis, by cathodic electrolysis, by cooling the galvanized steel sheet with an alkali solution, or by skin-pass rolling using an alkali solution or an acid which can dissolve aluminum oxide as a skin-pass roling liquid.
REFERENCES:
6001 Chemical Abstracts, vol. 97 (1982) November, No. 20, Columbus, Ohio (Abstract No. 171344X).
Hoboh Yoshihiko
Kondo Tomio
Morino Hisakazu
Nonaka Tadashi
Oishi Hiroshi
Sumitomo Metal Industries Ltd.
Tufariello T. M.
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