Volume 30 Issue 10
Oct.  2004
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Xiang Min, Zhang Qi, Luo Junhuaet al. Influence of salt spray corrosion on the performance of NiCoCrAlY coatings[J]. Journal of Beijing University of Aeronautics and Astronautics, 2004, 30(10): 1017-1020. (in Chinese)
Citation: Xiang Min, Zhang Qi, Luo Junhuaet al. Influence of salt spray corrosion on the performance of NiCoCrAlY coatings[J]. Journal of Beijing University of Aeronautics and Astronautics, 2004, 30(10): 1017-1020. (in Chinese)

Influence of salt spray corrosion on the performance of NiCoCrAlY coatings

  • Received Date: 28 Apr 2004
  • Publish Date: 31 Oct 2004
  • The NiCoCrAlY coatings prepared by electron beam physical vapor deposition (EB-PVD) was studied by a salt-spray-test. The influence of salt spray corrosion on the microstructure and high-temperature cyclic oxidation behavior of NiCoCrAlY coating was investigated. Results show that the alumina formed on the corroded NiCoCrAlY coating is roughness, cracked and incontinuous and many pits was formed on the surface of the coating after the salt-spray test. The Al2O3 films formed within the pit are rougher, which suggests the congregation of stresses and spallation of the oxide film during the cyclic oxidation. These changes will reduce the protection ability of the coatings during high-temperature oxidation and shorten the lifetime of cyclic oxidation of NiCoCrAlY coatings.

     

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