fig1
Figure 1. Four typical corrosion methods for electrode fabrication. (A) Oxygen corrosion; (B) Hydrogen evolution corrosion; (C) Oxidant corrosion; (D) Microbial corrosion. M represents the metal substrate, Ny+ is other metal ions in corrosion solution, [O] denotes the oxidizing agent, [R] is the reduction product of the oxidant, and Ax- is the involved anions in corrosion solution.
