[Ir:1].[Ta:2].C([OH:7])CCC>[Ti]>[Ir:1]=[O:7].[O-2:7].[Ta+5:2].[O-2:7].[O-2:7].[O-2:7].[O-2:7].[Ta+5:2]After the titanium substrate surface was roughened, it was painted with a n-butanol solution containing salts of iridium and tantalum in a ratio of iridium to tantalum of approximately 65% to 35% by weight. The applied solution was allowed to dry at ambient temperature for approximately 20 minutes. The painted titanium substrate was subsequently heat treated in a furnace having an oxygen containing atmosphere at approximately 500° C. for approximately 20-30 minutes to form an iridium oxide/tantalum oxide composite coating. The process of painting and heat treating the titanium substrate was repeated in order to obtain a total loading of about 2.0 g/m2. After this loading was achieved, the painted substrate was heat treated for approximately one hour at approximately 500° C.
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