Materials Chemistry
Effects of Fe3+ on the Corrosion Behavior of High-Purity Aluminum in Neutral Solutions Containing Cl−
2021 年 62 巻 4 号 p. 492-497
詳細
2021 年 62 巻 4 号 p. 492-497
In this study, the effects of Fe3+ on corrosion behavior of high-purity aluminum (Al) were investigated in aqueous NaCl solutions containing Fe3+ using immersion tests, electrochemical analysis, and surface observations. For high-purity Al immersed in an Fe3+ solution, the open circuit potential was much lower and the corrosion rate was higher than that of high-purity Al in a solution without Fe3+. The corrosion morphology of high-purity Al after immersion in the test solutions containing Fe3+ was mainly general corrosion; this differed significantly from the morphology of the Al immersed in a NaCl solution without Fe3+. The effects of Fe3+ on the corrosion behavior of high-purity Al were due to a less-protective passive film composed of Al(OH)3 and Fe(OH)3 that formed on high-purity Al during immersion.
