Effect of hydrogen on electrochemical behavior of additively manufactured 316L in pressurized water reactor primary water

作者：Martin Bojinov, Timo Saario, Yanling Ge, Litao Chang, Zaiqing Que · 发表于：Corrosion Science · 年份：2023 · DOI：10.1016/j.corsci.2023.111557 · 被引用次数：11 · 研究领域：Additive Manufacturing Materials and Processes、Nuclear Materials and Properties、Hydrogen embrittlement and corrosion behaviors in metals

The electrochemical behavior of laser powder bed fusion (LPBF) 316 L stainless steel subject to different heat-treatments (solution annealing and hot isostatic pressing) is compared to nuclear-grade wrought 316 L in pressurized water reactor primary water at 288 °C (with and without dissolved hydrogen) using current-time transients, cyclic voltammetry and electrochemical impedance spectroscopy (EIS). Analysis of spectra by the Mixed-Conduction Model revealed slower corrosion rates of LPBF 316 L than wrought 316 L, the effect being more pronounced in the presence of dissolved hydrogen. The characteristics of the barrier layer and the oxide film/coolant interface were irreversibly altered upon removal of dissolved hydrogen.