Chromium(VI)-free coating agent for metals
AssigneeM-M-Morant-GmbH
InventorsAlexander Ruhl, Max Mordant
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Abstract
The invention relates to a coating agent for coating acid-sensitive metal surfaces, which is an aqueous solution of an acidic phosphate binder, the coating agent comprising a peroxo compound and being free of chromium (VI) salts. The invention further relates to a method of coating a metal surface with such a coating agent, and to the use of such a coating agent for increasing the corrosion resistance of metal components in various industrial fields.
Claims19
A coating agent for coating acid-sensitive metal surfaces, which is an aqueous solution of an acidic phosphate binder, wherein the coating agent comprises a peroxo compound and is free of chromium (VI) salts and the coating agent further comprises an alkyne or cycloalkyne, the concentration of the alkyne or cycloalkyne being at least 0.01 wt. %.
Dependencies are inferred from the claim text.