METHOD FOR THE CLEANING AND/OR ANTI-CORROSION PRETREATMENT OF A PLURALITY OF COMPONENTS COMPRISING ZINC-COATED (ZM) STEEL
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United States of America Patent
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Issued Date -
Aug 8, 2024
app pub date -
Mar 12, 2024
filing date -
Sep 13, 2021
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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.
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