COMPOSITION AND PROCESS FOR FORMING PALLADIUM COATING IN PALLADIUM ALLOYS

摘要

P DIFFICULTIES RESULTING FROM THE ELECTROLYTIC DEPOSITION OF METALLIC PALLADIUM OR PALLADIUM ALLOYS FROM PALLADIUM DIAMMINO DICHLORIDE, DIAMMINO DINITRITE PALLADIUM AND PALLADIUM TRIAMMINO SULPHITE BATHS MAY BE AVOIDED BY PERFORMING THE ELECTROLYTIC DEPOSITION FROM PALLADIUM BATH CONTAINING OXALATE. PALLADIUM AND OXALATE MAY BE IN A SINGLE COMPLEX SUCH AS PALLADIUM DIAMMINO OXALATE (PD (NH) CO), PALLADIUM TETRAMMINO OXALATE (PD (NH) CO) OR AMMONIUM OR ALKALINE METAL SALT FROM PALLADIUM DIOXALATE (MPD (CO)), WHERE M REPRESENTS AN AMMONIUM OR ALKALI METAL CATION. / P P METAL ALLOY IONS MAY ALSO BE PRESENT, AS WELL AS AN ELECTROLYTE, A BRILLIANT AND / OR STRESS REDUCER. / P