Inhibition Efficiency of Alkaline Metal Salts on Carbon Steel Corrosion in Acidic Media

Abstract

Corrosion inhibitors are widely used in acid solutions during pickling and descaling. In this study, the inhibition performance of different alkaline metal salts in the concentration range 0-0.1 M has been found out. The corrosion behavior of low carbon steel in 1 M HCl in the presence of different metal cations and different anions is studied using weight loss and OCP (Open Circuit Potential) methods at 20 C. It is found that the addition of these salts inhibits the corrosion markedly. The inhibition effect is in the following order Na 2 SO 4 >NaI > LiCl > NaCl > KCl > NaNO 3 > NaBr.