Tu ne répond pas à ma question mais merci quand même
Autres citation en anglais " Magnetite anodes were in use early this century
for the production of chlorate . They were still in use in 1971 at tl~e Japan Carlit plant in
Japan . The,rate of anode loss is very small a loss of 5 mm~on the external diameter of 60 mm
after four years of continuous operation is reported ~ - and is not affected by temperature,
thus permitting operation at 70 ~ C "