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March 27, 2026High Temperature Corrosion of MaterialsOpen Access

Increasing the 900 °C Hot Corrosion Resistance of M (Ni, Co) CrAlY Type Coatings Under Na2SO4 Deposits Through Systematically Altering Cr and Co Contents and Re-evaluating Cr and Co Effects on Long-Term Hot Corrosion Behavior

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Authors

SSSercan SoyözCSCevat Sarıoğlu

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Overview

This research demonstrates improved hot corrosion resistance in MCrAlY coatings, suggesting beneficial alterations in chromium and cobalt content.

Key Points

  • The aim is to enhance the hot corrosion resistance of MCrAlY coatings by adjusting chromium and cobalt levels.
  • Modified chromium and cobalt contents in MCrAlY coatings.
  • Evaluated hot corrosion performance through weight change measurements.
  • Conducted surface and cross-section analysis of corrosion effects.
  • Proposed a mechanism to explain weight change and corrosion stages.
  • Increased chromium concentration did not improve hot corrosion resistance.
  • Higher cobalt content significantly improved resistance and delayed initiation of corrosion.
  • A detrimental effect on protective oxide formation was noted with higher Cr levels.
  • Co addition led to increased growth rates of Al2O3 scale.

Cite This Study

Soyöz et al. (2026) studied this question.

synapsesocial.com/papers/69c61ff615a0a509bde18566https://doi.org/10.1007/s11085-026-10386-2
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