Effects of temperature on electrochemical dissolution behavior of aluminum foil

Abstract

Electrochemical dissolution behavior of aluminum foil in acid etchants was clearly investigated with different temperatures. Due to the electrochemical activation of temperature, the surface dissolution of aluminum foil in H 2 SO 4 etchant slightly increased with the temperature. Even if NaCl was contained in the H 2 SO 4 solution, the dissolution of aluminum surface and the value of E pit were dependent on the temperature. The rising temperature decreased the resistance of pitting on aluminum foil surface, which enhancing the density and uniformity of the tunnel pits. The surface dissolution and tunnel etching behavior of aluminum foil was discussed by a schematic diagram.