Corrosion tests of graphite anodes in saturated
normalNaCl
solution at 40δC have been carried out at 100 A/dm2. The corrosion rate was a small function of the pH between 2 and 9, but affected by the active chlorine. Electrochemical formation of chlorate is a side reaction and is limited by slow diffusion of
normalHClO
and/or
normalClO
minus;. While chlorate does not affect degradation of graphite anode either electrochemically or chemically, the carbon surface oxide, which forms during electrochemical formation of chlorate from hypochlorite, is the largest factor in consumption of graphite anode in chlor‐alkali cells.