THE EFFECTS OF THE COMPOSITION OF TITANIUM-ALUMINUM ALLOY AND ANODIC OXIDE FILM ON THE BREAKDOWN POTENTIAL IN CHLORIDE AND BROMIDE SOLUTIONS

Local breakdown potentials E(br) of the passive oxide films covering t he titanium-aluminum alloys of various composition in KCl and KBr solu tions are measured. The specimens studied were covered with a natural oxide film in one series of experiments and with specially formed anod ic oxide films in the other series. E(br) Was shown to be different at different surface microsites of the same specimen because of the nonu niformity of the properties of oxide films. The character of the E(br) dependence on the composition of alloy is principally different for t he specimens covered with the natural film and those with the anodic o xide film.