[aeacfm]

does  chlorine corrosive to carbon electrode ? if yes what is the corrosion products ?

[DevaDevil]

maybe some useful reduction potentials:

Compare the oxidative power of chloride and oxygen:
Cl₂ (g) + 2 e⁻ <--> 2 Cl⁻     E⁰ = +1.36 V
O₂(g) + 2 H₂O + 4 e⁻ <--> 4 OH⁻(aq)    E⁰ = +0.40 V

see what happens to carbon (non-diamond) in presence of oxygen and acid (in alkaline carbon is even easier oxidized):
C (s) + H₂O  <--> CO (g) + 2 H⁺ + 2e^-  E⁰ = +0.517 V
CO (g) + H₂O  <--> CO₂ + 2 H⁺ + 2e^-  E⁰ = -0.106 V
  

Now reason what would happen to carbon in the presence of chlorine

[aeacfm]

great also at the same time when i was doing such electrolysis i found a lot of carbon particles in the anodic area which sounds like erosion as well ... any way thatnks a lot dr deva every time you are helpful