Author(s)

Y.-G. Kim, Y.-C. Kim & Y.-T. Kho

Abstract

BEM application for thin electrolyte corrosion problem Y.-G. Kim, Y.-C. Kim & Y.-T. Kho Materials and Corrosion Control Lab. R&D Center, Korea Abstract BEM methods were applied for a thin electrolyte problem. Al-2%Zn alloy thermal spray coatings are used for seawater heat exchanger made of Al-Mg alloy for LNG process utility. We investigated the remaining service life of the coating. The sprayed coating was acting as a sacrificial anode. The integrity of the coating degraded with time by peeling-off and thinning. The expected life of the coating is a crucial data for maintenance scheduling. The distribution of the corrosion potential and current were calculated with BEM analysis with BEASY CP 7.0 module. The anodic behavior of the coating was changed significantly by polymer sealing over-coating and the resultant remaining service life. The viscosity of the sealant determined the degree of impregnation and pore structure. The resin with lower viscosity value decreased the anodic cu

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