2019 Volume 68 Issue 1 Pages 28-32
In order to investigate the effect of Fe3＋ on corrosion resistance of 5083 aluminum alloy （A5083） in aqueous solution, electrochemical tests and surface observations were carried out in various solution. Open Circuit Potential （OCP） of the alloy in the solution containing Fe3＋ shifted to the less-noble direction regardless of the anionic species such as Cl－ and SO42－. From the polarization curves and the result of surface observation, the effect of Fe3＋ on the surface of A5083 was suggested that the Fe3＋ reduction reaction predominantly occurred on compounds.
Anodic reaction around the compounds possibly increased to balance the cathodic reaction. It caused the OCP shifting and the dissolution around compounds.