Baths and process for the chemical polishing of stainless steel surfaces
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United States of America Patent
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Feb 4, 1997
Issued Date -
N/A
app pub date -
May 25, 1995
filing date -
Feb 23, 1990
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Expired
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Abstract
Process for chemical polishing of austenitic stainless steel surfaces using chemical polishing baths effective at a slow rate of reaction. The baths include in an aqueous solution a mixture of hydrochloric acid, nitric acid and phosphoric acid, an optionally substituted hydroxybenzoic acid, at least one quaternary ammonium salt and an additive chosen from perchloric acid and water-soluble salts of perchloric acid.
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