Use of Multielectrode Arrays and Statistical Analysis to Investigate the Pitting Probability of Copper: Part II. The Effect of Sulfate and Bicarbonate

Copper and copper alloys have found applications in various industries. One of the main reasons Cu its are utilized widely is that they sufficient corrosion resistance key environments, such as seawater anoxic solutions; however, localized processes might occur presence aggressive anions, oxygen, or an increase solution pH. In critical Cu, susceptibility to corrosion, specifically pitting, must be carefully considered, it could lead material failure. this study, pitting probability unary (sulfate) binary (sulfate + bicarbonate) solutions was investigated using electrochemical techniques conjunction with statistical analysis. We determined probabilities based on two different defining criteria for susceptibility, one potential, E corr , exceed passivity breakdown b other, a more conservative approach, likelihood Ecorr would greater than repassivation rp . The did not change significantly sulfate concentration at pH 8 but increasing [ SO 4 2 − ] up 0.005 M 9 then decrease further ].