Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Coating predominantly single metal or alloy substrate of...
Patent
1994-01-27
1995-06-06
Niebling, John
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Coating predominantly single metal or alloy substrate of...
205156, 205243, 205244, 205287, 205316, 205319, C25D 356
Patent
active
054219884
ABSTRACT:
There is disclosed a method of manufacturing a plated steel sheet with a Zn--Cr composite plating, wherein a total of 0.01 to 300 g/l of at least one type of salt having a pH buffering action in a pH range of 2 to 6 in a bath containing only zinc are added to an acidic Zn--Cr composite plating bath containing zinc ions and trivalent chromium ions to prepare a plating bath, and plating film is formed on a steel sheet using the resultant plating bath.
REFERENCES:
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Ryochi Naka et al, "Rust proofed steel plates with good corrosion resistance", Chemical Abstracts, vol. 116, No. 22, Jun. 1, 1992, Columbus, Ohio, p. 296, No. 219 060s of Jpn Kokai Tokkyo Koho JP 03 240 994.
Nobukazu Suzuki et al., "Electroplating of an iron-zinc alloy", Chemical Abstracts, vol. 110, No. 14, Apr. 3, 1989, Columbus Ohio, USA, p. 624, No. 123 849f of Jpn Kokai Tokkyo Koho JP 63 241 194.
Shigeru Unno et al., "Electrodeposition of zinc, alumina and chromium on steel strip", Chemical Abstracts, vol. 110, No. 10, Mar. 6, 1989, Columbus, Ohio, p. 311, No. 80 400h of Jpn Kokai Tokkyo Koho JP 63 157 900.
"Zinc-nickel alloy electroplating", Kawasaki Steel Corp., Chemical Abstracts, vol. 98, No. 26, Jun. 27, 1983, Columbus, Ohio, p. 546, No. 224 256z of Japan Kokai Tokkyo Koho JP 58 09 997.
Abe Masaki
Ando Satoru
Urakawa Takayuki
Watanabe Toyofumi
Niebling John
NKK Corporation
Wong Edna
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