Use of dithiophosphinic acid and/or its salts for producing anti-corrosion coatings that are devoid of chrome

US10472525B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Monica Fernandez Gonzalez · Bischofswerda, DE
• Markus Hickl · Munster, DE
• Cordula Mock-Knoblauch · Ludwigshafen, DE
• Manfred Essig · Kaiserslautern, DE
• Wolfgang Schrepp · Heidelberg, DE
• Manfred Biehler · Kirchheimbolanden, DE

Key dates

• Filing date: Feb 19, 2016
• Grant date: Nov 12, 2019
• Expiry date: Oct 3, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23F11/167
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Use of dithiophosphinic acids of the general formula HS2P(R1)(R2) and/or salts thereof for producing chrome-free, polymer-containing corrosion control layers on metallic surfaces, R1 and R2 independently of one another each being organic radicals having 1 to 30 C atoms.