... production cost is lower than traditional noble metal electrodes, e.g. mixed metal oxide(MMO) electrode, platinized titanium electrode, ... In sulfuric acid system, electrolytic preparation of a variety of non-ferrous metal, for example, nickel, cobalt, copper, zinc, manganese, tin ... containing a small amount of chloride ion, electrowinning of non-ferrous metal.2. In strong acid solution such as chromic ...