Process for surface treatment of stainless steel sheet

Details Process for surface treatment of stainless steel sheet Process for surface treatment of stainless steel sheet

1981-07-29

1984-01-24

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 40, 204 56R, C25D 1136, C25D 1138

Patent

active

044274998

ABSTRACT:
A process for surface treatment of stainless steel sheets for excellent corrosion resistance and gloss is provided according to which a BA film or a passive film is formed on the stainless steel sheet; the sheet is dipped in a treatment solution containing 0.1 to 50% by weight of phosphoric acid, 0.1 to 10.0% by weight of a molybdate, chromic acid or a mixture thereof, and 0.1 to 2.0% by weight of magnesium oxide, sodium silicate or a mixture thereof; and cathodic treatment is carried out under the conditions of 1 to 600 A.sec/dm.sup.2 integrated electric current density and 0.degree. to 90.degree. C. solution temperature.

REFERENCES:
patent: 3118824 (1964-01-01), Yonezaki et al.
patent: 3247086 (1966-04-01), Goldstein et al.
patent: 3287237 (1966-11-01), Wilton
patent: 3531384 (1970-09-01), Inouye et al.
patent: 4071416 (1978-01-01), Sutton

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