Stress corrosion in titanium is caused by complex oxidation reactions. Reaction products were identified by X-ray diffraction, mass spectrometry, and gas chromatography. Chlorine gas was identified as an intermediate and regenerable reaction product that has a strong tendency to crack titanium. No reaction occurs if oxygen or oxide is absent. Extensive damage can occur even if only a small amount of salt is present. This sensitivity is attributed to recycling of chlorine. Of several surface treatments tested, metal coatings are most promising. Electrolytic nickel coatings, dipped aluminum coatings, and zinc coatings were most effective.
Under a previous contract, the W-Ta-Mo-Cb alloy system was investigated, and several tungsten-and tantalum-rich alloys were developed and evaluated in the form of extruded bars.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.