Patents Assigned to Solvay et Cie (Societe Anonyme)
  • Baths and process for the chemical polishing of stainless steel surfaces
    Patent number: 5599399
    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.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: February 4, 1997
    Assignee: Solvay et Cie (Societe Anonyme)
    Inventors: Francois Dujardin, Marianne Reignier, Nathalie Barthelemy