INFLUENCE OF TEMPERATURE ON CORROSION RESISTANCE OF AUSTENITIC STAINLESS STEEL IN CL- CONTAINING SOLUTIONS - Production Enginnering Archives

Temperature is considered a complicated external factor of the susceptibility of stainless steels to the pitting. This paper deals with the corrosion behaviour of AISI 316Ti stainless steel in temperature range 22 - 80°C in aggressive chloride environments (3 and 5% FeCl3 solutions). The corrosion re-sistance of tested steel is evaluated on the base of results of exposure immersion tests and cyclic poten-tiodynamic tests. According to the obtained results the resistance of AISI 316Ti to the pitting is mark-edly affected by temperature changes in the range 22 – 80°C. Intensity of corrosion attack increases with the rise of Cl- concentration. Gentle changes of temperature and Cl- concentration cause signifi-cant differences in character of local damage. The appearance of pitted surfaces changes with the rise of the temperature (a density of pitting increases, a size of pits decreases). The strongest change in ap-pearance is observed between 40 and 50ºC.