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Journal of Materials Engineering and Performance

, Volume 28, Issue 11, pp 7086–7096 | Cite as

Study of Wave-Absorbing Coating Failure by Electrochemical Measurements

  • Xinkun Wang
  • Zhiwei Shi
  • Binshi Xu
  • Shicheng Wei
  • Weiping LiEmail author
Article
  • 15 Downloads

Abstract

The absorption properties of wave-absorbing coatings can easily fail; therefore, a layer of corrosion-resistant topcoat is often added to the surface to increase the service life of the absorbing coating. In this study, we compare the changes in samples without or with a topcoat, namely fluorinated polyurethane, at 25 °C with a NaCl solution and at 35 °C with a neutral salt spray. Morphological characterization and composition analysis show that the topcoat can indeed greatly improve the corrosion resistance of the samples, but the absorption of the coatings still decreases in a short time. The reasons for this are indicated by electrochemical impedance spectroscopy. For the samples without a topcoat, the corrosion of the wave-absorbing coatings results in the failure of wave absorption. For the samples with a topcoat, it is likely that the state of the interface between the topcoat and absorbing coatings leads to the decline of the resistance of the wave-absorbing coatings, causing them to fail quickly.

Keywords

EIS failure wave-absorbing coatings 

Notes

Acknowledgments

This work was supported by National Key Research and Development Program (2018YFB2002000) and National Natural Science Foundation of China (51971012).

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Copyright information

© ASM International 2019

Authors and Affiliations

  • Xinkun Wang
    • 1
    • 2
  • Zhiwei Shi
    • 1
  • Binshi Xu
    • 3
  • Shicheng Wei
    • 3
  • Weiping Li
    • 1
    Email author
  1. 1.School of Materials Science and EngineeringBeihang UniversityBeijingPeople’s Republic of China
  2. 2.Beijing Aeronautical Technology Research CenterBeijingPeople’s Republic of China
  3. 3.National Key Laboratory for RemanufacturingAcademy of Army Armored ForcesBeijingPeople’s Republic of China

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