ANALISA KERUSAKAN PADA ATAP ZINCOATING DI LINGKUNGAN ATMOSFER INDUSTRI[Damage Analysis of Zincoted Roof in the Industrial Atmospheric]

Abstract

There has been damage to the roof of a factory in Industrial Area in Bekasi. The roof has been coated by a zincoating. However, after 16 months of usage, the roof has been damaged. The form of damage is thick and thin brownish deposits that stick on the roof. In this paper, the analysis of the damage include visual inspection, SEM-EDAX, metallography, test of deposit density, and analysis of the corrosion rate. The results showed that the color brown that sticks to the roof caused by the deposit of iron oxide from the air. The existence of deposits resulted in galvanic corrosion between iron oxide deposit and zincoating layers. Greatest corrosion rate was found in the roof with a thick brownish deposits.