Use of various construction materials in equipment is limited by the chemical resistance of these materials. Siliconized graphite and silicon carbide are used as sliding bearings in the equipment. The purpose of the study was to test the stability of these materials in solutions of alkalis and acids, which are parts of decontamination solutions for nuclear power plants. Preliminarily, positive results were obtained on the chemical resistance of silicon carbide and siliconized graphite materials.