600℃NaCl-MgCl2熔盐蒸汽中FeCl3浓度对316不锈钢腐蚀的影响

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells Pub Date : 2025-05-31 DOI:10.1016/j.solmat.2025.113751

Xiaoxiao Li , Bingren Meng , T.J. Pan , Pengfei Lu , Zhongfeng Tang

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引用次数: 0

摘要

研究了600℃NaCl-MgCl2熔盐蒸汽中不同浓度Fe3+离子对316不锈钢（316SS）腐蚀的影响。结果发现，随着Fe3+浓度的增加，316SS的失重量显著增加，这主要是由于Cr沿晶界优先溶解，晶间腐蚀深度随着Fe3+浓度的增加而加深。FeCl3的加入破坏了原NaCl-MgCl2熔盐的氧化还原性能，使其更具腐蚀性。FeCl3通过阴极还原反应加速合金元素的溶解，从而加速316SS的腐蚀。本研究揭示了Fe3+离子对熔盐蒸气中316SS腐蚀的催化加速作用，并首次阐述了Fe3+离子对腐蚀速率、形貌和腐蚀产物的调控机制。

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Effects of FeCl3 concentration on corrosion of 316 stainless steel in NaCl-MgCl2 molten salt vapor at 600 °C

The effect of different concentrations of Fe³⁺ ions on corrosion of 316 stainless steel (316SS) in NaCl-MgCl₂ molten salt vapor at 600 °C was investigated in this study. It was found that weight loss of 316SS increased significantly with increasing Fe³⁺ concentration, which was mainly due to the preferential dissolution of Cr along grain boundary, and the depth of intergranular corrosion deepened with increasing Fe³⁺ ions concentration. Addition of FeCl₃ damaged the redox properties of the original NaCl-MgCl₂ molten salt and made them more corrosive. FeCl₃ accelerated dissolution of alloying elements through cathodic reduction reaction, thus accelerating corrosion of 316SS. This study revealed the catalytic acceleration of Fe³⁺ ions on corrosion of 316SS in molten salt vapors, as well as the first elaboration about the regulatory mechanism induced by Fe³⁺ ions on corrosion rate, morphology and corrosion products.

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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.