The standard electrode potential for copper is approximately 340 mV, yet Reiber XXXXXXXXXXobserved an E corr of approximately 0 mV in Seattle tap water, Jones XXXXXXXXXXobserved an E corr of -350 mV...

The standard electrode potential for copper is approximately 340 mV, yet Reiber (1989) observed an E corr of approximately 0 mV in Seattle tap water, Jones (1996) observed an E corr of -350 mV in seawater, and Jinturkar et al. (1998) observed an E corr of approximately -120 mV in aerated 1 N H 2 SO 4 . What is a possible explanation for these observations?