Fabrication of Corrosion Resistance Micro-Nanostructured Superhydrophobic Anodized Aluminum in a One-Step Electrodeposition Process

Metals

Ying Huang¹  Dilip K. Sarkar¹  X.-Grant Chen¹ 

[1] Centre Universitaire de Recherche sur l’Aluminium (CURAL), Université du Québec à Chicoutimi, 555 Boulevard de l’Université, Chicoutimi, QC G7H 2B1, Canada;

关键词: superhydrophobic aluminum;    corrosion;    anodized aluminum oxide (AAO);    organic-inorganic;    micro-nanostructure;    zinc stearate (ZnSA);    potentiodynamic polarization;    electrochemical impedance spectroscopy (EIS);   

DOI  :  10.3390/met6030047

来源: DOAJ

【 摘 要 】

The formation of low surface energy hybrid organic-inorganic micro-nanostructured zinc stearate electrodeposit transformed the anodic aluminum oxide (AAO) surface to superhydrophobic, having a water contact angle of 160°. The corrosion current densities of the anodized and aluminum alloy surfaces are found to be 200 and 400 nA/cm2, respectively. In comparison, superhydrophobic anodic aluminum oxide (SHAAO) shows a much lower value of 88 nA/cm2. Similarly, the charge transfer resistance, Rct, measured by electrochemical impedance spectroscopy shows that the SHAAO substrate was found to be 200-times larger than the as-received aluminum alloy substrate. These results proved that the superhydrophobic surfaces created on the anodized surface significantly improved the corrosion resistance property of the aluminum alloy.

【 授权许可】

Unknown