Comparative chemical resistance investigation for titanium nitride and stainless steel in medium of mouth cavity

摘要

It has been shown that TiN powders do not practically interact with biochemical media. The interaction of both titanium nitride and Mn, Cr and Ti alloyed steel with distillated water, 3% NaCl, JICI and gastric juice has been studied with the aid of polarization curves method as well as XRD and Auger-spectroscopy analysis of electrode surface. The high corrosion resistance of materials above in H{sub}2O and saliva has been shown, but due to the salt presence and gastric juice throwing out from gullet into mouth cavity, the corrosion resistance of steel can decrease by some orders, compared with TiN In the case of TiN electrode, the mechanism of protective surface-active effect of organic reagents, being contained in the biochemical media, has been established. Meantime the high-alloyed steel is dissolved in the gastric juice significantly more intensively than in the hydrochloric acid with the same value of pH 2,0.