Abstract
The salt water corrosion characteristics of titanium nitride and titanium carbide coatings on steels, prepared by argon plasma-spraying dry Ti and TiC powders in open air, are described. Both the TiN and TiC coatings are attacked by salt water, the latter being corroded nearly twice as much as the former. The bond-coated and top-sealed (BT) coatings corrode less than the analogous coatings without these (NBNT) in the immersion tests. The BT coatings corrode more than the NBNT coatings in the salt water spray test. CaCO 3 deposits form on the TiC coatings from salt solutions containing Ca ions, but no such calcareous deposit was formed on the TiN coatings.
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