Effects of cathodic electrodeposition parameters of cerium oxide film on the corrosion resistance of the 2024 Al alloy

✍ Scribed by K. Brunelli; F. Bisaglia; J. Kovac; M. Magrini; M. Dabalà

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: German
• Weight: 723 KB
• Volume: 60
• Category: Article
• ISSN: 0947-5117
• DOI: 10.1002/maco.200805096

✦ Synopsis

Abstract

Cerium oxide thin films obtained by cathodic electrodeposition on 2024 aluminium alloy have been studied. The coatings, obtained with electrochemical deposition, offer an effective corrosion protection and require a lower deposition time when compared to chemical conversion coatings. The coatings were obtained at room temperature by deposition from CeCl~3~/H~2~O~2~ aqueous solutions and the influence of several parameters (CeCl~3~ concentration, H~2~O~2~ concentration, deposition time, current intensity) on the corrosion resistance was studied. The composition, morphology and microstructure of the films have been characterized by SEM, XPS and AFM. The corrosion resistance was investigated through potentiodynamic tests in 3% NaCl solution.