Rare Metals

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Morphology, structure and corrosion resistance of Mg–Al LDH films fabricated in different Al3+ concentration solutions

  • Liang Wu
  • Xing-Xing Ding
  • Xiao-Feng Zhao
  • Yuan-Huan Liu
  • Xue-Long Hao
  • Ai-Tao Tang
  • Gen Zhang
  • Fu-Sheng Pan


In situ-grown Mg–Al layered double hydroxide (LDH) films were obtained on an anodized AZ31 substrate, with the immersion of sample in different concentrations of Al3+ solution. The structure, composition and morphology of LDH films were investigated by X-ray diffraction (XRD), Fourier transform infrared (FTIR) and scanning electronic microscopy (SEM), and the corrosion behavior of LDH films was further studied by electrochemical impedance spectroscopy (EIS). The influence of Al3+ concentration on the growth behavior of LDH was also discussed. The results indicated that the nest-like structure of MgAl-LDH film was composed of interconnected MgAl-LDH nanosheets. Besides, the LDH obtained in 0.032 mol·L−1 Al3+ solution, possessing dense laminated structure, could effectively seal the porous surface of anodic oxide film. EIS results revealed that the samples coated with LDH films showed a higher electrochemical impedance, and thus, the corrosion resistance of samples coated with LDH films was signally improved compared with the anodized alloy.


Magnesium alloy In situ method Layered double hydroxide (LDH) films Al3+ concentration Corrosion resistance 



This work was supported by the National Key Research and Development Program of China (2016YFB0301100), the National Natural Science Foundation of China (51701029, 51531002, 51474043), China Postdoctoral Science Foundation Funded Project (2017M620410, 2018T110942), the Chongqing Postdoctoral Scientific Research Foundation (Xm2017010) and the Chongqing Research Program of Basic Research and Frontier Technology (cstc2016jcyjA0388, cstc2017jcyjBX0040).


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Copyright information

© The Nonferrous Metals Society of China and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringChongqing UniversityChongqingChina
  2. 2.National Engineering Research Center for Magnesium AlloysChongqing UniversityChongqingChina
  3. 3.SunRui Marine Environment Engineering Company LtdQingdaoChina
  4. 4.National Center of Analysis and Testing for Nonferrous Metals and Electronic MaterialsGeneral Research Institute for Nonferrous MetalsBeijingChina

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