Abstract
All of the lubricants evaluated, with the possible exception of fluorocarbons, are ineffective in reducing the galling of bare titanium metal. However, many of the wear problems have been minimized by coating the surface of the metal and then lubricating this surface. Thus, the wear resistance of the metal can be improved by oxide, nitride, and carbide case hardening and coatings. Chemical conversion coatings such as fluoride, phosphate, and anodized coatings help retain the lubricant and improve the resistance to galling. The most satisfactory procedure for preparing titanium surfaces for severe service is by the application of metallic coatings. Of the coatings tested, nickel has given the best results to date.
Published Version
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