Studies on Estimating Methods of Polarization Performance for Coated Steel in Seawater
The polarization curves and electrochemical impedance spectroscopy of coated steel after scratching cross-lines or cathodic polarization using COLT system connected to electrochemical workstation IM6ex in seawater are investigated and from the measured polarization data, potential distribution on hull surface under waterline are predicted using Beasy CP software. It is shown that an more pricise method for gaining polarization data of the coated steel in seawater is the electrochemical measurement carried out by COLT system and the method of scratching cross-lines or cathodic polarization for coating damage is simple and convenient for estimating the polarization data of a new coated hull that is closely related to the coating properties.
Jian-Feng Nie and Allan Morton
Y. H. Qi et al., "Studies on Estimating Methods of Polarization Performance for Coated Steel in Seawater", Materials Science Forum, Vols. 654-656, pp. 2418-2421, 2010