Método e aparelho para tratamento de superfície eletroquímico

摘要

A continuous strip is electrolytically coated in an electrolytic coating bath using a thin flexible or resilient dielectric wiping blade to wipe bubbles of hydrogen from the surface, sever dendritic material, if such is present as the coating thickens, and to remove a surface layer of partially depleted electrolytic solution, replacing with fresh solution and to stabilize strip portions extending between support rolls. The resilient dielectric wiper blade is preferably used with perforated anodes which allow fresh electrolytic solution to flow into the space between the anodes and the strip surface after being expelled by passage of the strip past the wiping blade. The orifices in the anode may be differentially sized to eliminate cavitation behind the wiping blades. The wiping blades may be chevron shaped to increase the wiping effect and pumps may be used to increase the flow of electrolytic solution into and out of the space between the anodes and the strip. Chevron shaped wiping blades may be used to increase the wiping effectiveness and continuous movable wiping blades may be used to provides additional wiping surface as the original wiping surface wears down. The wiping blades may also be angularly oriented with respect to the strip to increase the wiping effectiveness.