Bromide-ions additives effect on aluminium anodic behavior in borate buffer solution

摘要

The aluminum (Al 99. 99 %) anodic behavior in borate background solution (0.2 M H_3BO_3 + 0.05 M Na_2B_4O (pH 8.4)) with additives of bromide-ions (С_(Br)-= 10~(-3) … 6·10~(-3) M) at room temperature was investigated with using of a complex of the physic-chemical methods. It has shown that the metal local activation was observed in all studied systems. The obtained experimental results were interpreted according to modern theories of competitive adsorption, complexing and nucleophilic substitution. The mechanism of aluminum pit formation process in the studied systems was suggested.