PROCESS FOR PASSIVATING ANODIZATION OF COPPER IN A MOLTEN FLUORIDE MEDIUM, AND APPLICATION TO THE PROTECTION OF COPPER PARTS OF FLUORINE ELECTROLYZERS

摘要

In a process for obtaining a resistant, adherent, protective coating on copper parts with high recovery of substrate, by passivating anodization, said copper parts are immersed in a liquid KF, 2HF bath and subjected to a continuous or intermittent anodic current of low surface density less than 0.1 A/dm2.