Composite polar plate for electrolytic bath and electrolytic bath

The composite polar plate comprises an annular polar frame and a circular main polar plate, the polar frame and the main polar plate are concentrically welded into a whole, and the surface of the main polar plate is provided with a plurality of mastoids and recesses; the pole frame and the main pole plate are three-layer composite structure plate bodies, and each three-layer composite structure plate body comprises a base layer carbon steel layer, a middle layer ceramic film layer and a surface layer nickel plating layer. According to the utility model, the surface of the polar plate is compounded with ceramic, so that a ceramic film is formed on the surface, and finally, metal nickel is plated on the surface in a chemical nickel-plating manner. The surface of the electrode plate has the characteristics of good corrosion resistance, high temperature resistance and wear resistance, and the comprehensive performance of the surface of the electrode plate can be greatly improved. 本实用新型公开了电解槽用复合极板及电解槽，该复合极板包括环形极框和