Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 834, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.155210
Keywords
Superhydrophobic coating; Cerium oxide; Magnesium alloy; Anti-Corrosion; Self-cleaning
Categories
Funding
- National Natural Science Foundation of China [21676169, 21978182]
- Institute of New Energy and Low Carbon Technology of Sichuan University
- Ceshigo Research Service
- Engineering Teaching Center, School of Chemical Engineering, Sichuan University
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Corrosion is one of the most challenging issues for the large-scale application of magnesium alloys. Fabricating a superhydrophobic surface with a low-cost, easy-to-handle method is meaningful for anti-corrosion protection of Mg alloys. In this study, a stearic acid/CeO2 bilayer coating was prepared on AZ31B Mg by a simple electrodeposition method combined with immersion in stearic acid solution. The growth traits of the coating with different electrodeposition current densities and time were evaluated, which demonstrated that 60 min combined with 0.65 mA/cm(2) is the optimal electrodeposition condition. Besides, the wettability, anti-corrosion ability, durability, chemical stability and self-cleaning properties of the coating were comprehensively investigated. The results showed that the as-prepared coating exhibited a good superhydrophobic and self-cleaning property with CA>158 degrees and SA<2 degrees. Moreover, the coating demonstrated an improved anti-corrosion performance in 3.5 wt% NaCl solution and was quite stable in the atmosphere and in contact with pH droplets of 1-13. (C) 2020 Elsevier B.V. All rights reserved.
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