Pretreatment of Nickel Plating on ASA Resin Using Ozonated Water as Replacement for Chromic Acid Etching

抄録

In view of environmental concerns, ozonated water treatment was studied as a replacement for conventional chromic acid etching of plating on ASA Resin.
Ozonated water treatment achieves favorable adhesion without roughening the plastic's surface. Chemical analysis and cross-sectional observations show the formation of polar groups on the surface of the treated resin. Catalytic palladium particles are dispersed and adsorbed into the treated resin surface layer after the catalyzing step. Nickel ions penetrate and scatter into the treated resin layer during electroless nickel plating. These observations prove that favorable adhesion can be attributed to the formation of a nanoscale reformed layer, which is completely different from the conventional anchor effect produced using chromic acid etching.