Abstract

Abstract Case histories are described concerning corrosion of titanium in hot concentrated chloride solutions and the results of the laboratory investigation on the corrosion behavior of titanium and titanium-palladium alloy in chloride environments reported. Although passivity of titanium was very stable in solutions of moderate concentration, this stability was found to decrease with increasing temperature, chloride and hydrogen ion concentration. In boiling concentrated chloride solutions, severe corrosion occurred locally in crevices such as interfaces between two titanium sheets or titanium and Teflon sheets which was identical to that encountered in field experience. In contrast to titanium, no crevice corrosion was observed to occur under the same conditions for titanium-palladium alloys. Superior corrosion resistance of the alloy was confirmed by field tests.

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