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<p>In marine environments, chloride salts and high humidity can significantly degrade the performance of Ni-based superalloys. To mitigate corrosion at elevated temperatures, high-temperature protective coatings must be employed on Ni-based superalloys. In this study, NiCoCrAlY and Pt-modified NiCoCrAlY coatings were deposited, and their stability and adaptability were evaluated at 900&#xa0;°C in a simulated marine environment (containing NaCl+H<sub>2</sub>O vapor). The combination of experimental data and calculations provides an in-depth understanding of the corrosion resistance mechanism of both coatings. The results indicated that the Pt-modified NiCoCrAlY coating exhibits enhanced high-temperature corrosion resistance. This improvement is attributed to the introduction of Pt, which promotes the development of a continuous and adherent oxide scale, thereby providing protection against corrosion attack.</p> Graphical Abstract <p></p>

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Role of Pt in Mitigating High-Temperature Corrosion Behavior of NiCoCrAlY Coating Exposed to NaCl and O2/H2O Vapor at 900 °C

  • 期刊论文

  • 发表日期：

    2026年3月24日

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  • Yanyan Li,
  • Ke Zhang,
  • Chao Dong,
  • Yiming Jiang,
  • Jiemin Wang,
  • Shuai Li,
  • Zebin Bao,
  • Shenglong Zhu

摘要

In marine environments, chloride salts and high humidity can significantly degrade the performance of Ni-based superalloys. To mitigate corrosion at elevated temperatures, high-temperature protective coatings must be employed on Ni-based superalloys. In this study, NiCoCrAlY and Pt-modified NiCoCrAlY coatings were deposited, and their stability and adaptability were evaluated at 900 °C in a simulated marine environment (containing NaCl+H2O vapor). The combination of experimental data and calculations provides an in-depth understanding of the corrosion resistance mechanism of both coatings. The results indicated that the Pt-modified NiCoCrAlY coating exhibits enhanced high-temperature corrosion resistance. This improvement is attributed to the introduction of Pt, which promotes the development of a continuous and adherent oxide scale, thereby providing protection against corrosion attack.

Graphical Abstract