High-salt-tolerance anticorrosion coating with salt-enabled self-healing ability from branched polyethyleneimine and poly(acrylic acid)

  • Jiajia Wang
  • Yuhua Ma
  • Shun FengEmail author
  • Jide WangEmail author


A polyethyleneimine/poly(acrylic acid) (bPEI/PAA) multilayer coating was assembled on copper by layer-by-layer assembly and its anticorrosion performance and self-healing behavior investigated in 500 mM NaCl solution using multiple techniques including scanning electron microscopy, electrochemical impedance spectroscopy, equivalent circuit modeling, potentiodynamic polarization measurements, and cyclic voltammetry. In 500 mM NaCl solution, the coating could not only effectively prevent corrosion of copper by increasing the charge-transfer resistance and inhibition effectiveness of the system, but also spontaneously repair damage with a width of about 50 μm within 1 h. It is hoped that these findings will indicate a route for preparation of novel anticorrosion coatings with self-healing ability.


Coating Anticorrosion Self-healing Layer-by-layer assembly High-salt solution 



This work was supported by the Natural Science Foundation of China (No. 51541308).


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Copyright information

© American Coatings Association 2018

Authors and Affiliations

  1. 1.Key Laboratory of Oil Gas and Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, College of Chemistry and Chemical EngineeringXinjiang UniversityÜrümqiChina
  2. 2.School of Life Science and EngineeringSouthwest Jiaotong UniversityChengduChina

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