화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.103, 154-164, November, 2021
DOI10.1016/j.jiec.2021.07.031  Export Citation
Superhydrophobic and smart MgAl-LDH anti-corrosion coating on AZ31 Mg surface
Manyi Huang1, 2, Guangming Lu1, Jibin Pu1, †, and Yujie Qiang1, 3, †
  • 1Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China
  • 2University of Chinese Academy of Sciences, Beijing 100049, PR China
  • 3National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, PR China
E-mail:,
Layered double hydroxides (LDHs) have been widely used as ‘‘smart” containers in the field of metal corrosion protection, and have broad industrial prospects. It is environmentally friendly and feasible to use aliphatic carboxylates and corresponding acids as substitutes for harmful corrosion inhibitors. However, previous studies rarely involved comparing the anti-corrosion mechanisms of different aliphatic acids modified on the LDH surface, and the durability of the prepared coatings also needs to be improved. In this work, MgAl-LDH laminates were grown in situ on AZ31 substrates by a hydrothermal method, and then modified by sodium laurate (SL) and sodium dodecylbenzene sulfonate (SDBS). Due to the physical barrier effect of the LDH layers, the spatial repulsion effect of the air film and the ion exchange reactions in the interlayer galleries, the functional coatings prepared exhibit smart and superior anticorrosion performance on the magnesium substrates in 3.5 wt.% NaCl solution. Compared with LDHSDBS- 8 coating, the obtained superhydrophobic LDH-SL-8 coating shows more excellent long-term corrosion protection owing to the stronger intercalation capacity.
Keywords:LDH;Superhydrophobic coating;Active protection;Corrosion resistance;Surfactant
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