新型宽温域混合熔盐腐蚀性研究

doi:doi:10.19912/j.0254-0096.tynxb.2024-0720

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新型宽温域混合熔盐腐蚀性研究

更新时间：2025-10-22

- 新型宽温域混合熔盐腐蚀性研究
- Vol. 46, Issue 9, Pages: 626-631(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：doi:10.19912/j.0254-0096.tynxb.2024-0720
  CLC： TK519
- Published Online：14 October 2025，
  
  Published：2025
- 稿件说明：
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[J]. 2025, 46(9): 626-631.
DOI：

[J]. 2025, 46(9): 626-631. DOI： doi:10.19912/j.0254-0096.tynxb.2024-0720.

摘要

为探究金属材料在两种新型宽温域混合熔盐中的高温腐蚀性

该文采用失重法研究316L不锈钢在这两种新型宽温域混合熔盐中的腐蚀行为。结果发现

316L不锈钢在Solar salt、四元混合硝酸盐和三元混合硝酸-碳酸盐的1000 h的腐蚀速率分别为0.0121、0.0290和0.0900 mm/y

三元混合硝酸-碳酸盐的腐蚀性大于Solar salt和四元混合硝酸盐。对腐蚀测试后的316L不锈钢试样进行微观表征和产物分析

结果表明

316L不锈钢在三元混合硝酸-碳酸盐中腐蚀后形成疏松多孔的NaFeO2

从而导致不锈钢在三元混合硝酸-碳酸盐中腐蚀性增大。

Abstract

In order to investigate the corrosivity of metalicl materials at high temperatures in two new wide temperature range mixed molten salts

the paper studied the corrosion behavior of 316L stainless steel in two new wide-temperature range mixed molten salts using the weight loss method. The results showed that

over a period of 1000 h

the corrosion rates of 316L stainless steel in solar salt

quaternary nitrate-nitrite mixed salt and ternary nitrate-carbonate mixed salt were 0.0121

0.0290 and 0.0900 mm/a

respectively

and the corrosivity of ternary nitrate-carbonate mixed salt was greater than that of solar salt and quaternary nitrate-nitrite mixed salt. The results of microscopic characterization and product analysis on 316L stainless steel samples after corrosion testing showed that 316L stainless steel corrodes in ternary nitrate-carbonate mixed salt with the formation of loose and porous NaFeO

which leads to increased corrosion of stainless steel.

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references

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Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion of Beijing, Beijing University of Technology

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