LAUSR

To evaluate the corrosion resistance of the 5xxx series (5052-O and 5083-H321) Al-Mg alloys and the 6xxx series (6061-T6) Al-Mg-Si alloys used in marine environments, various electrochemical experiments were conducted and the surface damages were analyzed. In the results of cathodic polarization experiments, 6061-T6 was judged to have the best anticorrosive properties because of the lowest required current density in the cathodic protection potential section and of uniform calcareous deposit formed on the surface. In addition, in the results of cyclic polarization experiments, the pitting resistance of 6061-T6 was shown to be the highest During the anodic polarization experiments 6061-T6 presented the least surface damage. Through electrochemical experiments, 6061-T6 was selected as an aluminum alloy material with excellent corrosion resistance in marine environments.