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Corrosion resistance of a self-curing waterborne epoxy resin coating

  • Gongwen Tang
  • TingTing Ren
  • Zhishan Yan
  • Linrong Ma
  • Xianhui Pan
  • Jing Liu
  • Xiangyu Hou
  • Xin HuangEmail author
Article
  • 13 Downloads

Abstract

Waterborne coatings have gained more and more attention as a method to protect the environment. However, the application of waterborne coatings to metals, especially for sufficient long-term protection in harshly corrosive environments, is still limited. Here, we report a self-curing waterborne coating with good corrosion resistance. First, a self-curing waterborne epoxy resin (SWEP) was synthesized by a chemical reaction between the epoxy resin and titanium diisopropoxide bisacetylacetonate in water. The structural characterizations via Fourier transform infrared spectroscopy and 13C nuclear magnetic resonance spectrsocopy confirmed the successful preparation of the SWEP resin. Differential scanning calorimetry and thermogravimetric analysis showed that the SWEP resin could be cured by heating without the use of any curing agents, and the cured coating exhibited good thermal resistance. The mechanical properties of the cured coatings were discussed in the context of the corresponding standards. The results confirmed that the physical properties of the SWEP coating were as good as those of a traditional two-component waterborne epoxy resin (DCWEP) coating. The chemical resistance analysis revealed that the water, acid and alkaline resistances of the SWEP coating all have significant improvements compared to those of the DCWEP coating. The electrochemical impedance spectroscopy and potentiodynamic polarization test implied that the SWEP coating provided better corrosion protection for metal substances than the DCWEP coating.

Keywords

Self-curing Waterborne coating Corrosion resistance Epoxy resin Titanium diisopropoxide bisacetylacetonate 

Notes

Acknowledgments

This work was financially supported by a Team Project using the Fundamental Research Funds for Central Scientific Research Institutions (Nos. K-JBYWF-2016-T18 and K-JBYWF-2017-T17), Innovative talents project using the Fundamental Research Funds for Central Scientific Research Institutions (No. K-JBYWF-2018-CR03), the Tianjin Postdoctoral Innovation Projects Merit Funding Scheme, the Projects in the National Science and Technology Pillar Program during the Twelfth Five-year Plan Period (No. 2014BAB06B00) and the National Natural Science Foundation of China (No. 51401061).

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Copyright information

© American Coatings Association 2019

Authors and Affiliations

  1. 1.The Institute of Seawater Desalination and Multipurpose UtilizationSOATianjinChina

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