Effect of Reaction Time of One-step on Corrosion Resistance of Superhydrophobic Coatings on AZ91 Magnesium Alloys

被引：0
|
作者：
Li S. [1 ]
Wang D. [1 ]
Xie W. [1 ]
Li X. [1 ]
Li X. [1 ]
机构：
[1] College of Mechanical Engineering, Sichuan University of Science and Engineering, Sichuan, Zigong
来源：
Cailiao Daobao/Materials Reports | 2023年 / 37卷 / 18期
关键词：
AＺ91 magnesium alloy; corrosion resistance; one⁃step process; superhydrophobic coating;
D O I：
10.11896/cldb.22010063
中图分类号：
学科分类号：
摘要：
One⁃step method combined hydrothermal etching and modification using stearic acid ethanol and zinc sulfate solution was used to prepare superhydrophobic coatings on the AＺ91 magnesium alloys. The effect of reaction times of the one⁃step method on hydrophobicity and corrosion resistance of superhydrophobic coatings was studied. The phase composition and microstructure of coatings were analyzed by Ｘ⁃ray photoelectron diffractometer (ＸＲD), Ｆourier transform infrared ray (ＦTIＲ), scanning electron microscope (ＳEM) and EDＳ spectrum. And the hydrophobicity and corrosion resistance were characterized by contact angle and polarization curve. With the increase of reaction time, the contact angles of the coatings first increased and then decreased. The coating prepared with 7 h of action time had the maximum contact angles of 154.2°, which was a superhydrophobic coating, and the coated sample had the lowest corrosion current density and the biggest impedance, which was 3 orders of magnitude lower and 5 orders of magnitude higher than those of uncoated magnesium alloy matrix, respectively. Ｓo, the corrosion resistance of the magnesium alloy was significantly improved. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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