Studi Korosi Baja Galvanis Melalui Perlakuan Ekspos Di Lingkungan Perairan Sungai Cidaho - Sukabumi

Abstract

Study of Corrosion on Galvanized Steel After Exposure in The Water Environment of Cidaho River - Sukabumi] In the study, the behavior of galvanized steel has been studied within the Cidaho River, Sukabumi-West Java. The heavy mortality of galvanized steel is determined by the weight loss method after being exposed for a certain period in river surface and 1 meter water depth. The surface morphology and chemical composition of the corrosion products were analyzed by using Scanning Electron Microscopy (SEM) - Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction (XRD). After exposure, all galvanized steel surfaces are covered by corrosion products. The result of weight loss of galvanized steel after being exposed to 76 days were 1.37 mg/cm2 in the river surface and 7.83 mg/cm2 in 1 meter depth. Increased damage from galvanized steel in water depth occurs because there was no eroded current protective layer formed. The dominant corrosion product in galvanized steel which has been exposed in 1 meter water depth was Zincite (ZnO). These results indicate that the use of galvanized steel is not recommended in the depth of water.