Yaping Wang, Rishi Pillai
This study investigates the role of temperature in the hot corrosion process of nickel-aluminum coatings on nickel-based superalloys induced by sodium sulfate (Na2SO4) and potassium sulfate (K2SO4) deposits. The objective is to elucidate the mechanisms underlying Type II hot corrosion, which is less well-understood compared to Type I. Methodologically, experiments were conducted to analyze the interactions between these sulfate deposits and the superalloy coatings under various temperature conditions. The findings indicate that the presence of K2SO4 in Na2SO4 deposits significantly accelerates the corrosion process due to the formation of liquid sulfate mixtures at lower melting temperatures. Additionally, it was observed that the corrosion mechanisms are influenced by the equivalent activity of sulfur trioxide (SO3) and temperature, highlighting the importance of liquid formation for the occurrence of severe corrosion. The results provide valuable insights into the complex behaviors of sulfate-induced degradation in gas turbine environments and suggest strategies for improving the durability of coating materials in practical applications.
@article{28b16ad3-7eda-4276-988d-1779a9deccef,
title={Role of Temperature in Na 2 SO 4 K 2 SO},
author={Yaping Wang and Rishi Pillai},
year={2026},
language={en}
}TY - JOUR TI - Role of Temperature in Na 2 SO 4 K 2 SO AU - Yaping Wang AU - Rishi Pillai PY - 2026 LA - en ER -
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