METHOD AND COMPOSITIONS FOR THE PREVENTION OR REDUCTION OF SPECK RUSTING OF COLD ROLLED, ANNEALED STEEL PRIOR TO TEMPER ROLLING

摘要

A method and composition for the prevention or reduction of speck rusting of cold rolled, annealed steel prior to temper rolling wherein phosphoric acid or the ammonium hydroxide neutralization products of phosphoric acid are added to the rolling emulsions used during the cold rolling step. The invention contemplates the use of conventional oil-water cold rolling emulsions to which the above noted additions are made in an amount of from about 200 to about 500 ppm as PO4.