Method for passivating metallic surfaces with aqueous compositions comprising surfactants

US8986467B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Guido Vandermeulen · Ilvesheim, DE
• Achim Fessenbecker · Ludwigshafen, DE
• Bernd Laubusch · Bad Kötzting, DE
• Helmut Witteler · Monsheim, DE
• Jurgen Tropsch · Lichtenfels, DE

Key dates

• Filing date: Oct 4, 2011
• Grant date: Mar 24, 2015
• Expiry date: Jun 16, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D5/12
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method for passivating metallic surfaces, wherein the surface is contacted with an aqueous composition comprising at least one water-soluble polymer (X) comprising acidic groups and with at least one surfactant (T) based on alkoxylated alcohols, the pH of the composition being in the range from 0.5 to 5, enables durable protection of the surface.