Non-Destructive Evaluation of Protective Coatings on AA2024-T3 Aluminum Alloy Used in Aeronautical Parts by Electrochemical Impedance Spectroscopy

Authors

  • Alain Robin Departamento de Engenharia de Materiais, Escola de Engenharia de Lorena,
  • Luis Gustavo Pacheco Departamento de Engenharia de Materiais, Escola de Engenharia de Lorena,
  • Júlio César Lourenço Departamento de Engenharia de Materiais, Escola de Engenharia de Lorena,

DOI:

https://doi.org/10.6000/2369-3355.2016.03.03.4

Keywords:

Plasma Treatment, Natural rubber, Flexible, Reinforcement treatment.

Abstract

Plasma treatments have faced growing interest as important strategy to modify the hydrophobic/hydrophilic characteristics of materials. However, challenges related to the plasma modification of polymers are the improvement of the chemical resistance without decreasing the mechanical resistance. In this letter, we present for the first time a plasma treatment, using Sulfur hexafluoride (SF6), analogous to vulcanization process, of natural rubber surface, which resulted in a chemical and tension resistance improvements. The natural rubber membranes were coated with glow discharge plasmas generated in sulfur hexafluoride (SF6) atmospheres at a total pressure of 160 mTorr and applying 70 W of radiofrequency. Plasma treatment increases the contact angles from 64° to 125° i.e. leading to a hydrophobic surface. The tension at rupture increased from 3.7 to 6.1 MPa compared to natural rubber without plasma treatment demonstrated by stress-strain investigation. These results provide a fast alternative approach to improve mechanical and chemical properties of rubber-based products.

References

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Published

2016-12-21

How to Cite

Robin, A., Pacheco, L. G., & Lourenço, J. C. . (2016). Non-Destructive Evaluation of Protective Coatings on AA2024-T3 Aluminum Alloy Used in Aeronautical Parts by Electrochemical Impedance Spectroscopy. Journal of Coating Science and Technology, 3(3), 121–128. https://doi.org/10.6000/2369-3355.2016.03.03.4

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