Analysis of the corrosion products formed on Ti and a Ti-Pd alloy during exposure in hot water

This is a preliminary report dealing with the surface analysis of reaction products formed on Ti and a Ti-Pd alloy during their exposure in hot water. The compositions of the aqueous media were varied with respect to the dissolved oxygen and the content of chloride ions. The temperature was 600C and the exposure times were 10 min. and 6 months. Work is in progress in which samples are exposed at 800C and 950C in the aqueous solutions. Surface analysis was also performed on a sample which had been exposed in water-saturated bentonite. It appears from te ESCA spectra that the oxide products formed on the surface consist of TiO2. The results also indicate that the thickness of the film formed at 600C in water is in the range 50 A to 100 A. This is somewhat more than that obtained after exposure in water at room temperature. Exposure for 6 months increases the thickness of the oxide two to three times compared to that obtained during the short exposure at 600C. The analyses of the samples that had been embedded in bentonite indicate that the surface reaction products are thinner than those found on the surface after exposure in an open vessel