Patent · US Active

Method for the cleaning and/or anti-corrosion pretreatment of a plurality of components comprising zinc-coated (ZM) steel

US12234561B2 · kind B2 · utility

0Cited by

2References

18Claims

0Family size

Assignee

Henkel AG & Co. KGaA · DE

Inventors

Ralf Posner · Dormagen, DE
Kristof Wapner · Mülheim an der Ruhr, DE
Christian Kolt · Dressendorf, DE
Silvia Schmidt · Hilden, DE

Key dates

Filing date	Mar 12, 2024
Grant date	Feb 25, 2025
Priority date	—
Expiry date	Mar 12, 2044

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C22/24
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The present invention relates to a method for the cleaning and/or anti-corrosion pretreatment of a plurality of components in series, in which the components of the series are at least partially composed of zinc-coated (ZM) steel. After a cleaning stage and before further cleaning and/or anti-corrosion pretreatment, the components pass through a treatment stage for improving the wettability of the zinc-coated (ZM) steel surfaces in which at least the surfaces of the zinc-coated (ZM) steel of the components are brought into contact with an aqueous medium which contains at least one builder which is a salt of a Lewis acid-base pair in which the Lewis acid is selected from Li+, Na+, K+, Ca2+, Mg2+ or Al3+, and the Lewis base is selected from anions of a polyprotic Brønsted acid.

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