Patent · US Active

Method for the anti-corrosion and cleaning pretreatment of metal components

US11408078B2 · kind B2 · utility

0Cited by

2References

18Claims

0Family size

Assignee

Henkel AG & Co. KGaA · DE

Inventors

Jerzy-Tadeusz Wawrzyniak · Goldkronach, DE
Dalija Ehmann · Dressendorf, DE
Nils Bongartz · Haan, DE
Matilde Senatore · Dressendorf, DE

Key dates

Filing date	Jun 16, 2020
Grant date	Aug 9, 2022
Priority date	—
Expiry date	Sep 16, 2040

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C22/73
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention relates to a multiple-step method for the corrosion-protective pretreatment of components, said pretreatment being at least partially produced from a metal material predominantly consisting of at least one of the elements iron zinc and/or aluminium, according to which the components are first brought into contact with an acid aqueous composition (A) containing water-soluble compounds of the elements Zr and/or Ti and then with an acid aqueous composition (B) containing phosphate ions and an accelerator. The method is particularly suitable for the pretreatment before an electrocoating.

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