Phosphate chemical treatment method

Details Phosphate chemical treatment method Phosphate chemical treatment method

1995-11-01

1997-07-08

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Involving measuring, analyzing, or testing

205 98, 205318, 148253, C25D 902

Patent

active

056457065

ABSTRACT:
The present invention is a method of forming a phosphate chemical treatment film which is efficient and allows a high-quality chemical film to be obtained, by which a substance to be treated is subjected to electrolytic treatment while removing the sludge, which consists of impurities other than the unavoidable impurities in the phosphate chemical treatment bath. According to this method, an adequate phosphate chemical treatment film may be formed onto any type of metal material, to provide phosphate chemical treatment films having thicknesses not obtainable by the prior art.

REFERENCES:
patent: 4565585 (1986-01-01), Matsuda
patent: 4622078 (1986-11-01), Opitz et al.
patent: 4874480 (1989-10-01), Sonoda
patent: 5039361 (1991-08-01), Hauffe
patent: 5254321 (1993-10-01), Jackson
patent: 5401381 (1995-03-01), Seidel
Derwent Abstract of JP 53-92341 to Nippon Paint (Aug., 1978).
Zantout, et al: "Electrochemical Acceleration of Phosphating Processes", Transactions of the Institute of Metal Finishing, vol. 61, No. 3, 1983, pp. 88-92.
Gabe et al: "Anodic Acceleration of Phosphating Processes", Metal Finishing, vol. 83, No. 4, Apr. 1985, pp. 41-44.

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