ANODIC BEHAVIOR OF ALUMINUM-ZINC ALLOYS IN NEUTRAL MEDIUM

The anodic behavior of aluminum-zinc alloys in a solution containing 3 wt. % of NaCl was studied by the potentiodynamic method with a potent ial sweeping rate of 10 mV . sec(-1). It was established that the stea dy-state, pitting-formation, and repassivation potentials are negative ly shifted by zinc additives, which is followed by an increase in the current densities of the onset of passivation and of total passivation . It was shown that doping aluminum-zinc alloys with gallium or indium considerably negatively shifts the corrosion potential of the alloys, making them effective protectors for corrosion protection of metallic constructions.