One-Step Electrodeposition Process To Fabricate Corrosion-Resistant Superhydrophobic Surface on Magnesium Alloy

• Published in: ACS applied materials & interfaces Vol. 7; no. 3; pp. 1859 - 1867
• Main Authors: Liu, Qin, Chen, Dexin, Kang, Zhixin
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 28.01.2015
• Subjects: magnesium; corrosion; one-step; electrodeposition; hierarchical structure; superhydrophobic
• ISSN: 1944-8244; 1944-8252
• DOI: 10.1021/am507586u

A simple, one-step method has been developed to construct a superhydrophobic surface by electrodepositing Mg–Mn–Ce magnesium plate in an ethanol solution containing cerium nitrate hexahydrate and myristic acid. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy were employed to characterize the surfaces. The shortest electrodeposition time to obtain a superhydrophobic surface was about 1 min, and the as-prepared superhydrophobic surfaces had a maximum contact angle of 159.8° and a sliding angle of less than 2°. Potentiodynamic polarization and electrochemical impedance spectroscopy measurements demonstrated that the superhydrophobic surface greatly improved the corrosion properties of magnesium alloy in 3.5 wt % aqueous solutions of NaCl, Na2SO4, NaClO3, and NaNO3. Besides, the chemical stability and mechanical durability of the as-prepared superhydrophobic surface were also examined. The presented method is rapid, low-cost, and environmentally friendly and thus should be of significant value for the industrial fabrication of anticorrosive superhydrophobic surfaces and should have a promising future in expanding the applications of magnesium alloys.