Work

The influences of traces of oxygen and sulfide on the corrosion of copper in concentrated chloride solutions

Year: 2024

Type: article

Abstract: The corrosion of wrought, electrodeposited, and cold spray deposited copper was electrochemically monitored for ~160 days in 3 M NaCl solution containing traces of sulfide under anoxic and Ar-purged conditions. Corroded specimens were analyzed using scanning electron microscopy and Raman and X-ray photoelectron/Auger spectroscopies. Under anoxic conditions, corrosion was supported by sulfide only and the rate decreased with time causing only minor damage. Under low oxygen conditions maintained by Ar-purging, the rate increased with time and significant damage was observed, attributed to oxy-sulfur species formation. These results suggest that oxy-sulfur species, not just sulfide, are required to cause intergranular corrosion.

Source: Corrosion Science

DOI: 10.1016/j.corsci.2024.112047