Corrosion resistance of epoxy primer, polyurethane, and silyl acrylate anti-fouling on carbon steel

International Seminar on Metallurgy and Materials

Devanny, S.^1 ; Riastuti, R.^1

Department of Metallurgy and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok, West Java, Indonesia^1

关键词: Acrylate copolymers;    Atmospheric environment;    Linear polarization;    Marine environment;    Passive behavior;    Polarization analysis;    Polarization measurements;    Visual observations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/541/1/012052/pdf
DOI  :  10.1088/1757-899X/541/1/012052

来源: IOP

【 摘 要 】

Anti-fouling paint is commonly applied as a protective coating on steel structures in the marine environment; one of the anti-fouling paint materials is silyl acrylate copolymer which can hydrolyse with seawater and form leaching layers to release biocide pigments. This study evaluates a three-layer paint comprised of epoxy primer, polyurethane, and silyl acrylate anti-fouling on carbon steel plates through polarization measurements and a salt spray test. Linear polarization measurements are carried out on an unscribed specimen with a potential range of -1.0 to 1.0 Volts. The salt spray test is conducted on scribed specimens, lasts 168 hours, and involves periodic visual observation. The polarization analysis shows pseudo-passive behavior in a system that represents, first, the less protective passive layer of primer and, second, the progressive erosion of a leaching layer of the anti-fouling paint which exposes a new layer beneath. The salt spray test shows that the three-layer paint has poor corrosion resistance in the atmospheric environment indicated by peeled layers and the occurrence of underfilm corrosion since the 48-hour test period.