Process for coating phosphated metal substrates

US5773090A · kind A · utility

Assignee

• Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

• Gabriele Buttner · Ratingen, DE
• Matthias Kimpel · Schwelm, DE
• Klausjorg Klein · Wuppertal, DE

Key dates

• Filing date: Feb 26, 1997
• Grant date: Jun 30, 1998
• Expiry date: Feb 26, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D13/20
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A process for coating phosphated metal substrates with one or more organic coatings, in which after phosphating and before application of a first organic coating, the phosphated metal substrates are treated with an aqueous solution which contains 5 to 10000 ppm of dissolved titanium, vanadium, molybdenum, silver, tin, antimony and/or one or more elements of atomic numbers 57 to 83 in the form of inorganic and/or organic compounds, wherein the phosphated metal substrates are additionally connected as a cathode during the entire treatment or for part of the duration of the treatment.