Corrosion and Scaling Behavior of Stainless Steel in Low-temperature Geothermal Water Environment

Electrochemical test, static corrosion immersion test, and scanning electron microscopy observation were used to study the corrosion and scaling behavior of B44660 super ferritic stainless steel and 316L stainless steel in a simulated geothermal water environment in central China. The results show that in the geothermal water environment, corrosion rates of both stainless steels increased with increasing temperature, and the two stainless steels had scaling phenomenon in low temperature geothermal water environment. The main components of scaling were CaCO₃ and MgCO₃. 316L stainless steel had better corrosion resistance and scale resistance than those of B44660 stainless steel, and thus was more suitable for use in geothermal environments in central China.