Corrosion performance of steel and galvanized steel in Karangsong and Limbangan sea water environment

Abstract

Due to wide spread use of steel and galvanized steelin Indonesia, it is important to study corrosion behavior of these materials in marine environments. Thus, corrosion performance of those materials was conducted in Karangsong and Limbangan. Since, the surface data was not available in the literature. Those materials were immersed in sea water for 27 days. The corrosion measurement was conducted by weight loss. Sea water parameter such as temperature, pH, salinity, DO (Dissolved Oxygen), and conductivity were measured. SEM-EDS was conducted to see corrosion morphology. The results showed that mild steel was more corroded than galvanized steel in both seawater environments. Corrosion rate of mild steel and galvanized steel in the Karangsong sea water were 29.5 and 8.4 mpy respectively, and corrosion rate of mild steel and galvanized steel in Limbangan sea water were 25.5 and 7.6 mpy respectively.