Effecte of hydrogen charging and electrotransport treatment on the anodic polarization behavior and mechanical property of alloy 600

Electrotransport treatment is a new method to remove the hydrogen from inside metals. Potentiodynamic polarization tests, electrochemical impedance spectroscopy (EIS), and tensile tests were used to investigate the effect of electrotransport treatment on the anodic behavior and hydrogen embrittlement characteristics of Alloy 600. The hydrogen-charged specimen exhibited a higher anodic current than that of the uncharged specimen. In particular, the anodic current was reduced so that the electrotransport treatment had features similar to that of the uncharged specimen. The EIS results showed that the capacitance loop of the hydrogen-charged specimen was smaller than that of the electrotransport treatment specimen. Results regarding tensile behavior revealed that electrotransport treatment enhanced the mechanical property of hydrogen-charged specimens.