Patent · US Active

Method for corrosion-protective and cleaning pretreatment of metallic components

US11761092B2 · kind B2 · utility

0Cited by

1References

31Claims

0Family size

Assignee

Henkel AG & Co. KGaA · DE

Inventors

Jerzy-Tadeusz Wawrzyniak · Goldkronach, DE
Nils Bongartz · Haan, DE
Dalija Ehmann · Dressendorf, DE
Henry Rossmaier · Goldkronach, DE

Key dates

Filing date	Jun 5, 2019
Grant date	Sep 19, 2023
Priority date	—
Expiry date	Jun 24, 2042

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC11D2111/16
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The present invention relates to a method for the corrosion-protective and cleaning pretreatment of metallic components, produced at least partially from metallic materials from the elements iron, zinc and/or aluminum, with the use of an acid aqueous composition containing, in addition to the water-soluble compounds of the elements Zr and/or Ti causing the conversion of the metal surface, a mixture of an aliphatic diol and an aliphatic saturated polyhydroxy compound. It also comprises a chrome(VI)-free aqueous composition based on the constituents mentioned above which delivers outstanding results in cleaning and simultaneous corrosion-protective conversion of technical metal surfaces in one method step.

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