Process for surface treatment of stainless steel sheet
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United States of America Patent
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-
Jan 24, 1984
Grant Date -
N/A
app pub date -
Jul 29, 1981
filing date -
Jun 4, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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