Experimental Study on Corrosion Characteristics of Ternary Mixed Chloride Salt NaCl-KCl-MgCl<sub>2</sub>

Zhengzheng ZHAO; Yao WANG; Bin LIU; Gaosheng WEI

doi:10.12096/j.2096-4528.pgt.18221

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Experimental Study on Corrosion Characteristics of Ternary Mixed Chloride Salt NaCl-KCl-MgCl₂

New and Renewable Energy | 更新时间：2025-07-04

- Experimental Study on Corrosion Characteristics of Ternary Mixed Chloride Salt NaCl-KCl-MgCl₂
- Power Generation Technology Vol. 39, Issue 6, Pages: 561-565(2018)
- 作者机构：
  
  1.百吉瑞(天津)新能源有限公司, 天津市空港经济区 300300
  2.电站设备状态监测与控制教育部重点实验室(华北电力大学), 北京市昌平区 102206
- 作者简介：
- 基金信息：
  
  National Key Research & Development Plan of China(2017YFB061804)
- DOI：10.12096/j.2096-4528.pgt.18221
  CLC：
- Received：12 October 2018，
  
  Published：31 December 2018
- 稿件说明：
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Zhengzheng ZHAO, Yao WANG, Bin LIU, et al. Experimental Study on Corrosion Characteristics of Ternary Mixed Chloride Salt NaCl-KCl-MgCl₂[J]. Power Generation Technology, 2018, 39(6): 561-565.
DOI：

Zhengzheng ZHAO, Yao WANG, Bin LIU, et al. Experimental Study on Corrosion Characteristics of Ternary Mixed Chloride Salt NaCl-KCl-MgCl₂[J]. Power Generation Technology, 2018, 39(6): 561-565. DOI： 10.12096/j.2096-4528.pgt.18221.

摘要

熔盐是目前太阳能热电站中应用最广泛的储热蓄热材料。为满足太阳能热发电系统对于熔盐的储热需求，该文将304、316L、321、310S不锈钢置于550℃的三元混合氯化盐NaCl-KCl-MgCl

（7：1：2）体系中，开展混合熔盐的腐蚀特性实验研究，并探讨其中的腐蚀机理。研究结果表明，在三元混合氯化盐NaCl-KCl-MgCl

（7：1：2）体系中，310S表现出较好的耐腐蚀性能，304的耐腐蚀性较差。MoO

、NiO、TiO

氧化物的生成可提高316L、310S、321不锈钢的耐腐蚀性能；混合氯化盐在高温下生成的Cl

是不锈钢腐蚀的重要原因，外部空气中的O

和H

O会进入熔盐侧与合金发生反应，加剧腐蚀。

Abstract

Molten salt is the most widely used heat storage material in solar thermal power stations currently. In order to meet the heat storage requirements of the solar thermal power generation system for molten salt

four stainless steels of 304

316L

321 and 310S were placed in the ternary mixed chlorinated salt NaCl-KCl-MgCl

(7:1:2) system at 550℃ to study corrosion characteristics and explore corrosion mechanisms. The research results indicate that 310S shows good corrosion resistance and 304 shows poor corrosion resistance in the NaCl-KCl-MgCl

(7:1:2) system of ternary mixed chlorinated salts. The formation of MoO

NiO and TiO

oxides can improve the corrosion resistance of 316L

310S and 321. The Cl

produced by mixed chloride salts at high temperature is an important cause of corrosion of stainless steel

and H

O in the outside air will infiltrate into the molten salt and react with the alloy to accelerate the corrosion.

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Keywords

references

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Experimental Study on Corrosion Characteristics of Ternary Mixed Chloride Salt NaCl-KCl-MgCl2

DOI：10.12096/j.2096-4528.pgt.18221

摘要

Abstract

关键词

Keywords

references

Experimental Study on Corrosion Characteristics of Ternary Mixed Chloride Salt NaCl-KCl-MgCl₂