Abstract
Formation of mineral scales of CaCO3 and CaSO4 poses significant problems in cooling water systems. During the precipitation of mixed CaCO3 and CaSO4 salts, Tyrosine (Tyr), polyacrylic acid (PAA) and yeast were used as anticorrosion of S41000 stainless steel in artificial seawater. In absence of additive, the oxygen reduction occurs in the pores formed between the scale crystals and metallic surface. The anticorrosion properties of these compound in presence of mixed scales were studied through electrochemical methods. The results show that yeast acts as a very good anticorrosion inhibitor. The beneficial effect of yeast compare with PAA and Tyr is due to its composition.