METHOD FOR ANTI-CORROSION TREATMENT OF A METAL SURFACE WITH REDUCED PICKLING MATERIAL
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United States of America Patent
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Issued Date -
Jul 22, 2021
app pub date -
Apr 28, 2017
filing date -
Apr 29, 2016
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Abstract
A process for anticorrosion treatment of a metallic surface, including bringing the surface into successive contact with the an alkaline or acidic cleaner composition, a first rinsing composition, optionally a second rinsing composition, an acidic conversion composition, optionally a third rinsing composition, and a composition including a (meth)acrylate- and/or epoxide-based cathodic electrophoretic coating. At least one of the compositions includes at least one compound of the formula R1O—(CH2)x—Z—(CH2)y—OR2. R1 and R2 are each, independently of one another, H or an HO—(CH2)w— group with w≥2. X and y are each, independently of one another, from 1 to 4 and Z is an S atom or a C—C triple bond. An aqueous composition for reducing corrosive removal of material in anticorrosion treatment of metallic surfaces is disclosed.
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