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Cathodic Polarization Behaviors of Titanium in Seawater

GUO Min, PENG Qiao, SUI Yong qiang, CUI Chang jun (College of Chemical Engineering, Dalian University of Technology, Dalian 116012, China)  
Cathodic polarization behaviors of titanium in seawater were investigated by using potentiodynamic polarization and SEM and XRD. Results indicated that cathodic polarization of titanium was great and hydrogen evolution was retarded. With the temperature rising from room temperature to 60℃, hydrogen evolution became more easily. XRD and SEM results showed that hydrogen embrittlement susceptivity of titanium was increased under cathodic polarization in seawater and there existed more cleavages on the fracture zone though TiHx was not observed in the specimens under cathodic polarization at 1.1V for 48 hours.
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