Method for electrolytic removal of scale from band steel

摘要

Removal of scale from scale-covered band steel is accomplished by subjecting the scale-covered band steel to electrolysis in an electrolyte of sodium chloride at temperatures of 80 DEG to 100 DEG C with the band steel used as the cathode and the electrode tool as the anode for thereby inducing a reaction of cathodic reduction which reduces ferrosoferric oxide (Fe3O4) as the main component of the scale into an amorphous substance and subsequently subjecting the treated band steel to electrolysis in an electrolyte of sodium chloride at the same tempertures with the band steel used as an anode and the electrode tool as a cathode for thereby inducing a reaction of anodic dissolution which causes the scale now in the form of amorphous substance to be dissolved out in the form of iron ion into the electrolyte.