Abstract
In ocean engineering, cathodic polarization is usually applied to protect corrosion. CaC03 and Mg (OH)2 deposits will occur in certain protective potential ranges and affect crack growth process. The distribution of deposit and its retarding effect on crack growth have not been quantified yet. In this paper, the behavior of crack growth under cathodic protection in sea water was investigated; deposit thickness distribution and its variation with crack growth are shown. Moreover, a new model based on deposit growth law is proposed which explains the anomalous crack growth behavior under cathodic protection in sea water.
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