SURFACE ROUGHENING LIQUID ETCHANT FOR PRETREATMENT TO PLATE TITANIUM AND TITANIUM ALLOY WITH PLATINUM AND SURFACE ROUGHENING ETCHING METHOD FOR PLATINUM PLATING PRETREATMENT

摘要

PURPOSE: To provide a pretreating liq. and method by which the surface of titanium and titanium alloy is easily pretreated in a short time with good operability and by which a platinum plating uniform, dense and excellent in adhesion is obtained. ;CONSTITUTION: This surface roughening liq. etchant for platinum plating pretreatment consists of one kind among 4-12 N nitric acid, 2-24 N sulfuric acid and 4-12 N hydrochloric acid and contains 0.05-0.5wt.% fluoride. The oxide layer on the surface is removed, and then the surface is uniformly and finely etched with the etchant as the pretreatment for platinum plating.;COPYRIGHT: (C)1996,JPO