We further investigated if the cause of copper corrosion in CO2-saturated electrolyte solution was pH induced. The pH of the KHCO3 electrolyte was recorded to be 5 when CO2-saturated and 7 when saturated with N2. We used 0.01 M H2SO4 to adjust the pH of KHCO3 electrolyte saturated with N2 to a pH = 5. Similar to what was observed when the pH was not adjusted, no copper degradation was observed when the pH of an N2 saturated 0.01 M KHCO3 electrolyte was adjusted to 5. This eliminated pH as a likely cause for copper degradation when CO2 instead of N2 is bubbled into the electrolyte.