Abstract

In order to observe the cathode behavior of the surface of aluminum treated by the mixed solution of TiO2 and HCl, the cathode polarization potentials in various electrolytes are measured.A series of experiments about four electrolytes CuSO4, NiSO4⋅(NH4)2SO4, ZnSO4, FeSO4⋅FeCl2, done by changing concentration, amount of buffer-and addition-reagents, and temperature of electrolytes, reveals that the potential is much affected by the stortage of Cu2+ and N2+, and that the solution temperature of 20°C is preferable.When it is necessary to change the potential of the cathode surface, the reading of which generally lies betweem those of ordinary aluminum surface and FeCl-HCl solution, control of pH value and amount of addition of buffer and other reagents should properly be considered.

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