Influence of the Anodic Oxidation Treatment on the Corrosion Behaviour of Aluminium and Aluminium Alloyss
Résumé
This paper deals with the effect of anodic oxidation treatment on the corrosion
behaviour of 6061 aluminium alloy in natural sea water. Anodic oxidation
treatment leads to the formation of an amorphous oxide layer on the top surface of
6061 aluminium alloy as shown by optical microscopy results. The corrosion
behaviour was investigated in natural sea water, harvested from the Black Sea,
Mangalia harbour. The study was done by in situ electrochemical methods such as:
open circuit potential (OCP), electrochemical impedance spectroscopy (EIS),
potentiodynamic polarization (PD) and cyclic voltammetry polarization (CV). The
results show that the untreated 6061 aluminium alloy undergoes severe corrosion in
natural sea water in comparison with anodized 6061 aluminium alloy. The results
obtained by different electrochemical methods were in good agreement with each
other and showed an improved corrosion resistance of the anodic oxide layer
formed on aluminium alloy in natural sea water. The results were confirmed by
optical microscopy.
Collections
- 2015 fascicula9 nr3 [10]