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The cathode materials for copper electrodeposition and electrolytic refining include thin copper starting sheet (traditional method) and permanent stainless steel plate (ISA, KIDD, OT, and EPCM technical methods). The cathode used for the permanent cathode electrolysis technique is composed of 316L stainless steel plate, current conducting rod, and insulated edge. The plate for the main part of the permanent cathode is made of 316L stainless steel, and the conducting rod forms are rectangular square copper tubes, copper-clad steel and steel-clad copper respectively.