Investigation of the Corrosion Resistance of some Safely Additives and Mixed Salts – Scales on S41000 Stainless Steel Surface in Synthetic Seawater

摘要

Formation of mineral scales of CaCO3 and CaSO4 poses significant problems in cooling watersystems. 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 absenceof additive, the oxygen reduction occurs in the pores formed between the scale crystals and metallicsurface. The anticorrosion properties of these compound in presence of mixed scales were studiedthrough electrochemical methods. The results show that yeast acts as a very good anticorrosioninhibitor. The beneficial effect of yeast compare with PAA and Tyr is due to its composition.