КОРРОЗИОННАЯ СТОЙКОСТЬ НЕРЖАВЕЮЩИХ ПОРОШКОВЫХ ТВЕРДЫХ СПЛАВОВ TiC-СТАЛЬ. Korrozionnaâ stojkost' neržaveůşih poroškovyh tverdyh splavov TiC-stal'

Abstract

Corrosion properties of powder metallurgical solidy alloys made of high wear resistance TiC and of corrosion-proof steel has been investigated in NaOH solution of 20% conc., in 10% HNO3, in 3% H2SO4 and in 44% H3PO4 solutions. The corrosion of solid alloys is deteriorating not only the metal, but also reduces its wear resistance. Our preliminary experiments performed with some corrosion-proof steels disclosed that the corrosion resistance of solid alloys made of nickel-free steels with high chrome content is poor. Solid alloys produced of austenite chromonickel steels with TiC proved to be acceptable. These solid alloys did not corrode at all in NaOH, as well as in acidic solutions. In the presence of inhibitors their corrosion resistance is further improved.