Facile electrodeposition of superhydrophobic aluminum stearate thin films on copper substrates for active corrosion protection

SURFACE & COATINGS TECHNOLOGY

卷:364

Article

Xu, Wei¹  Rajan, Karthikeyan¹  Chen, X. Grant¹  Sarkat, D. K.¹ 

[1] UQAC, Aluminium Res Ctr REGAL, Univ Res Ctr Aluminium CURAL, 555 Blvd Univ, Chicoutimi, PQ G7H 2B1, Canada

关键词: Copper (Cu);    Superhydrophobic;    Stearic acid;    Electrodeposition;    Anticorrosion;   

DOI  :  10.1016/j.surfcoat.2019.02.070

来源: Elsevier

【 摘 要 】

A facile aluminum based superhydrophobic thin films were electrodeposited by mixing aluminum isopropoxide (AlOx) with stearic acid (SA) onto the copper substrates via one-step method. The energy dispersive X-ray spectroscopy (EDS) attenuated total-reflectance Fourier Transmission infrared spectroscopy (ATR-FTIR) were used to confirm the presence of Al, C, and O as well as COO-Al and C-H bonds in the thin film. The water-roll off properties were analyzed by measuring the contact angle to study the superhydrophobic nature of fabricated films. Results show that superhydrophobicity with the water contact angle of 161 +/- 1 degrees and the contact angle hysteresis of 2 +/- 1 degrees were obtained with respect to the AlOx/SA molar ratio of 0.33. The morphology of the fabricated thin films consisted of uniform porous structures with surface roughness (rms) of 3 mu m on the copper substrate. The addition of stearic acid plays an important role for the superhydrophobic property. Furthermore, the thin films and their anticorrosion behavior were investigated using 3.5 wt% corrosive aqueous NaCl electrolyte solution. The polarization resistance of the thin film is found to be 962 k Omega.cm(2) as characterized by Tafel. Similarly, impedance value of 10 M Omega.cm(2) was obtained from Electrochemical Impedance Spectroscopy (EIS). A simple fabrication of water-repellent superhydrophobic aluminum-based coating endues extremely high active in corrosion protection.

【 授权许可】

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