(1) The layer of solution in contact with the anode that differs in composition from that of the bulk of the solution.
(2) The outer layer of the anode itself consisting of oxidation or reaction products of the anode metal.
outer the the
(1) The layer of solution in contact with the anode that differs in composition from that of the bulk of the solution.
(2) The outer layer of the anode itself consisting of oxidation or reaction products of the anode metal.