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This experimental work aims to evaluate the corrosive performance of various NiCr-reinforced Cr3C2 coatings on boiler tube steel at a temperature of 700 °C. Coatings were applied using the high velocity oxy-fuel (HVOF) method, incorporating 10, 20, and 35 wt% of NiCr into Cr3C2. The coated samples were subjected to a simulated boiler environment with molten salt at 700 °C, and corrosion parameters were monitored through weight gain measurements. Surface analysis of the corroded samples was conducted using different microstructure analysis techniques. All coatings on boiler steel exhibited resistance to corrosion under these harsh conditions, with 90 Cr3C2–10 NiCr and NiCr coatings demonstrating superior corrosion resistance.

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Evaluating Hot Corrosion Behavior of Different NiCr–Cr3C2 Coatings in Molten Salt Environment at 700 °C Temperature

  • 会议论文

  • 发表日期：

    2025年

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  • Charanjit Singh,
  • Harvinder Singh,
  • Khushdeep Goyal

摘要

This experimental work aims to evaluate the corrosive performance of various NiCr-reinforced Cr3C2 coatings on boiler tube steel at a temperature of 700 °C. Coatings were applied using the high velocity oxy-fuel (HVOF) method, incorporating 10, 20, and 35 wt% of NiCr into Cr3C2. The coated samples were subjected to a simulated boiler environment with molten salt at 700 °C, and corrosion parameters were monitored through weight gain measurements. Surface analysis of the corroded samples was conducted using different microstructure analysis techniques. All coatings on boiler steel exhibited resistance to corrosion under these harsh conditions, with 90 Cr3C2–10 NiCr and NiCr coatings demonstrating superior corrosion resistance.