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<p>To enhance the corrosion resistance of alloys in chloride-containing solar salt environment, a multi-component alloy by doping Co and Fe to partially substitute Ni in the NiCrMoNb model alloy is fabricated in this study. The results demonstrate that the the doped Co/Fe promote the formation of dense and abundant oxide layer on the alloy surface at 600 °C in molten chloride salt-solar salt mixture. Despite localized corrosion poles still exist, the formation of transverse cracks is notably suppressed. Moreover, after spallation of corrosion products, the Co/Fe doped NiCrMoNb alloy exhibits accelerated response speed through rapid reformation of compact oxide layer, effectively mitigating subsequent corrosion rates.</p>

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Impact of multi-component doping effect on corrosion mechanism of NiCrMoNb model alloy in molten chloride salt-solar salt mixture

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月6日

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  • Huayi Lu,
  • Ruoyu Li,
  • Yuke Wang,
  • Yufei Cheng,
  • Minghui Yu,
  • Yanli Wang,
  • Chaoliu Zeng

摘要

To enhance the corrosion resistance of alloys in chloride-containing solar salt environment, a multi-component alloy by doping Co and Fe to partially substitute Ni in the NiCrMoNb model alloy is fabricated in this study. The results demonstrate that the the doped Co/Fe promote the formation of dense and abundant oxide layer on the alloy surface at 600 °C in molten chloride salt-solar salt mixture. Despite localized corrosion poles still exist, the formation of transverse cracks is notably suppressed. Moreover, after spallation of corrosion products, the Co/Fe doped NiCrMoNb alloy exhibits accelerated response speed through rapid reformation of compact oxide layer, effectively mitigating subsequent corrosion rates.