The degradation of silicone coatings in high temperature atmospheres

摘要

To evaluate the degradation of silicone based coatings that protect the mild steel surfaces fromcorrosion in high temperature atmospheres, the coatings were exposed to muffle furnace forheating-cooling cycle (as per ASTM specification D 2485) up to 700℃. The ability of the paint filmto withstand the temperature is related to its resistance as well as microcracks. These factors are veryuseful in precisely quantifying the degree of deterioration of the protective film. In the present work,two types of silicone based paints (silicone-titanate, Rhodorsil silicone) were prepared and thesurface degradation of these coatings were studied by EIS technique and SEM with EDAX analysis.The chemical resistance properties were also analyzed.