NiCrMoNb模型合金和NiCoFeCrMoNb高熵合金在600℃熔融太阳盐中的腐蚀机理

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells Pub Date : 2025-05-21 DOI:10.1016/j.solmat.2025.113725

Huayi Lu , Yufei Cheng , Ruoyu Li , Minghui Yu , Yanli Wang , Chaoliu Zeng , Xiangwei Li , Wangyan Lv

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引用次数: 0

摘要

本工作旨在探索具有更好的抗熔融硝酸盐性能的合金优化，首先参照耐蚀性能良好的Inconel 625合金的主要成分设计铸态63Ni-22Cr-10Mo-5Nb模型合金，然后用20wt % Fe和20wt % Co代替模型合金中的40wt % Ni，得到23Ni-20Fe-20Co-22Cr-10Mo-5Nb高熵合金。结果表明，以co尖晶石结构为主的腐蚀产物的形成对NiCoFeCrMoNb高熵合金的耐蚀性至关重要。此外，NiCrMoNb模型合金的主要腐蚀产物NiO发生碱性溶解，导致耐腐蚀性下降。

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Corrosion mechanism of NiCrMoNb model alloy and NiCoFeCrMoNb high entropy alloy in molten solar salt at 600 °C

Present work aims to explore alloy optimization with better resistance to molten nitrates by firstly designing the as-cast 63Ni-22Cr-10Mo-5Nb model alloy referring to the main components of Inconel 625 alloy with good corrosion resistance and then substituting 40 wt% Ni in the model alloy with 20 wt% Fe and 20 wt% Co to obtain a 23Ni-20Fe-20Co-22Cr-10Mo-5Nb high entropy alloy. Results show that the formation of corrosion products dominated by Co-spinel structures is crucial for the corrosion resistance of the NiCoFeCrMoNb high-entropy alloy. Moreover, the main corrosion product NiO for NiCrMoNb model alloy experiences alkaline dissolution, resulting in the declining corrosion resistance.

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来源期刊

Solar Energy Materials and Solar Cells 工程技术-材料科学：综合

CiteScore

12.60

自引率

11.60%

发文量

513

审稿时长

47 days

期刊介绍： Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.