During welding of a steel assembly, copper is deposited on the surface of the weld. This area will not E Coat and requires mechanical removal of the deposit. Different ways of chemically removing the copper has failed. Please suggest either a new wire composition that will eliminate the copper deposits or something to add to the chemical pre-treat that will sufficiently remove the copper before E Coat.
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Copper in Welding Wire causing E Coat problems
- Thread starter doctj
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This is a well-known problem in the automotive industry. Either the weld must be mechanically abraded (media blasted, wire wheel/brush, etc.) or it will have to be acid pickled. Acid cleaning, meaning low concentration of acid, is not sufficient, it must be pickled in concentrated acid in order to remove the surface layer.
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