Evaluation of anticorrosion and antifouling paint performance after exposure under seawater Surabaya–Madura (Suramadu) bridge

The performance of carbon steel, galvanized steel and aluminium after one month exposed in the atmospheric coastal area, which is in Limbangan and Karangsong Beach, West Java, Indonesia was evaluated. The corrosion rate was determined by weight loss method and the morphology of the steel after exposed was observed by Scanning Electron Microscopy(SEM)/Energy Dispersive X-Ray Analysis(EDX). The site was monitored to determine the chloride content in the marine atmosphere. Then, the corrosion products formed at carbon steel were characterized by X-Ray diffraction (XRD). The result showed that the corrosion aggressivity in Karangsong was higher than in Limbangan beach, indicated from corrosion rate analysis of carbon steel, galvanized steel and aluminium in Karangsong beach was higher than Limbangan beach. The decreasing order of result of corrosion rate were aluminium < galvanized steel < carbon steel in every site. The chloride content was found to be the main factor that influences in the atmospheric corrosion process in this area. Chloride content accumulated in Karangsong and Limbangan was 497 mg/m2.day and 117 mg/m2.day, respectively. The XRD Analysis on each carbon steel led to the characterization of the correspondent oxide phases. AIP Conf. Proc.1823,2017, 020101-1–020101-7