PRODUCTION OF LONG LIFE INSOLUBLE ELECTRODE

摘要

PURPOSE:To form films of Pt group metals of superior corrosion resistance and adhesiveness free from pinholes in the production of an insoluble electrode for electrolytic treatment by coating a Pt group metal or its compd. on the surface of a base material, then irradiating laser light thereto. CONSTITUTION:An insoluble electrode used for electrolytic reaction is manufactured by coating a Pt group metal on the surface of Ti as a conductive base material for conduction of electricity. In this case, a Pt group metal, its alloy or its oxide is coated on the surface of the Ti base metal, after which laser light having 0.1-10 KJ/cm3 energy density is irradiagted for 3 seconds-3 milliseconds. The Pt group metal, alloy or the like formed on the surface of the Ti base metal melts thoroughly and forms the smoothed continuous film where there are virtually no pinholes and grain boundaries, whereby corrosion resistance is improved. Also, the diffused layer of both metals is formed between the Pt group metallic film and the Ti base material, by which the adhesive power between the base metal and the coating layer is increased and the insoluble electrode of superior durability is obtained.