Patent · US Active

Process for corrosion-protecting pretreatment of a metallic surface containing steel, galvanized steel, aluminum, an aluminum alloy, magnesium and/or a zinc-magnesium alloy

US12043753B2 · kind B2 · utility

0Cited by

4References

21Claims

0Family size

Assignee

CHEMETALL GMBH · DE

Inventors

Stefan Birkenheuer · Shanghai, CN
Dietmar Chmielewski · Munster, DE
Carina Hecker · Frankfurt am Main, DE
Oliver Sauer · Frankfurt am Main, DE
Daniel Schatz · Stuttgart, DE

Key dates

Filing date	Sep 6, 2017
Grant date	Jul 23, 2024
Priority date	—
Expiry date	Sep 5, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C2222/20
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Described herein is an improved process for anticorrosion pretreatment of a metallic surface including steel, galvanized steel, aluminum, an aluminum alloy, magnesium and/or a zinc-magnesium alloy, wherein the metallic surface is brought into contact with i) an acidic aqueous composition A which includes a1) at least one compound selected from the group consisting of titanium, zirconium and hafnium compounds, and with ii) an aqueous composition B which includes b1) at least one (meth)acrylate resin and b2) at least one phenol resin, where the metallic surface is brought into contact firstly with the composition A and then with the composition B and/or firstly with the composition B and then with the composition A and/or simultaneously with the composition A and the composition B.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.