Patent · US Active

Method for treating metallic surfaces with an acidic aqueous composition and a post rinsing composition to improve corrosion resistance

US12049571B2 · kind B2 · utility

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16Claims

0Family size

Assignee

SPECIALTY OPERATIONS FRANCE · FR

Inventors

Stefan Birkenheuer · Shanghai, CN
Carina Hecker · Frankfurt am Main, DE
Oliver Sauer · Frankfurt am Main, DE
Daniel Schatz · Stuttgart, DE
Nawel Souad Khelfallah · Frankfurt am Main, DE
Marie-Pierre Labeau · Sèvres, FR
Guillaume Gody · Rueil-Malmaison, FR

Key dates

Filing date	Jul 3, 2019
Grant date	Jul 30, 2024
Priority date	—
Expiry date	May 5, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25D13/22
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Described herein is a method for treatment of a metallic surface, including the step of (A) contacting the metallic surface with a first aqueous composition, and a subsequent step of (B) contacting the metallic surface subsequent to step (A) with a second aqueous composition. Also described herein is a kit-of-parts including the first and second aqueous composition and a kit-of-parts including master-batches of the first and second aqueous compostions. Also described is a method of using the kit-of-parts for treating a metallic surface and substrates including the thus treated metallic surfaces.

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