Abstract
The aim of this work is to develop a targeted test plan to identify the relative role of hydrogen embrittlement in CI-SCC for 304L at ambient and moderately elevated temperatures, in addition to evaluating hydrogen’s impact on microstructural changes ahead of a propagating crack. A hydrogen recombination poison will be used, and a study was conducted to determine the appropriate poison to maintain anodic dissolution behavior in the chloride containing solutions, while simultaneously varying the materials hydrogen uptake. It was determined through electrochemical testing and hydrogen charging experiments that the addition of 1.5 mg/L arsenic achieves this and will be used for future mechanistic work of 304L.