PRODUCTION OF ZN OR ZN-NI ALLOY PLATED STAINLESS STEEL STRIP

摘要

PURPOSE:To improve the adhesion of plating by activating the surface of a stainless steel strip by anodizing in an aq. soln. of hydrochloric acid or sulfuric acid under prescribed conditions and by plating the strip in a Zn or Zn-Ni alloy plating bath. CONSTITUTION:An aq. soln. contg. 0.5-40wt.% hydrochloric acid or =1wt.% sulfuric acid is prepd. A degreased stainless steel strip is immersed in the aq. soln. and anodized at 0.1-100A/dm2 current density to activate the surface. The strip is then electroplated in a Zn or Zn-Ni alloy plating bath of =pH3.5.