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Paper Details

Corrosion behavior of 304-stainless steel in aqueous sulphate Environment

P.Selvakumar* and G.T.Parthiban1

Journal Title:Journal of Chemical, Biological and physical sciences

In different industries Stainless steel corrode in different environments. The various environments can affect the metal to different extents. The effect of pH and concentration of Aluminium sulphate in aqueous environment has been studied. The potentiodynamic polarization experiment was carried out at 0.003M, 0.03M and 0.15M concentration with the pH values of 5, 7, 9, 11, and 12.5. Weight loss experiment was also carried out at 0.003M, 0.03M and 0.15M concentrations. The results from potentiodynamic polarization technique indicate that when the pH value increases, corrosion potential shifts towards less negative values. Hence the metal becomes less susceptible to corrosion. Corrosion rate determined from the corrosion current density was compared with those obtained by weight loss method. From the above studies, it is observed that the corrosion of stainless steel is decreased with decrease in the concentration of Aluminium sulphate (0.003M to 0.15M) at constant pH or with increase in pH at constant concentration.