MgCl<sub>2</sub>-NaCl-KCl熔盐体系中金属Mg对316H不锈钢的缓蚀性能研究

doi:10.11902/1005.4537.2020.012

中国腐蚀与防护学报

2021, Vol. 41

Issue (1): 80-86 DOI: 10.11902/1005.4537.2020.012

研究报告

本期目录 | 过刊浏览

MgCl₂-NaCl-KCl熔盐体系中金属Mg对316H不锈钢的缓蚀性能研究

左勇¹^,²^,³(

), 曹明鹏¹^,³, 申淼¹^,², 杨新梅¹^,²^,³

^1.中国科学院上海应用物理研究所上海 201800
^2.中国科学院洁净能源创新研究院大连 116023
^3.中国科学院大学北京 100049

Effect of Mg on Corrosion of 316H Stainless Steel in Molten Salts MgCl₂-NaCl-KCl

ZUO Yong¹^,²^,³(

), CAO Mingpeng¹^,³, SHEN Miao¹^,², YANG Xinmei¹^,²^,³

^1.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
^2.Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
^3.University of Chinese Academy of Sciences, Beijing 100049, China

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摘要:

通过电化学方法结合浸泡腐蚀测试考察了金属Mg对MgCl₂-NaCl-KCl (MNKC) 熔盐的净化和腐蚀抑制作用。结果表明，金属Mg的加入量在500 μg·g^-1以上时，316H不锈钢在600 ℃ MNKC熔盐中的腐蚀电位E_corr＜-0.80 V vs NiCl₂/Ni，腐蚀电流密度I_corr＜25 μA/cm²，线性极化电阻R_p＞800 Ω·cm²，熔盐对316H不锈钢的腐蚀得到显著抑制。并对金属Mg对MNKC熔盐的净化和腐蚀抑制机理进行了探讨。

关键词 ：氯化物熔盐, 腐蚀控制, 316H不锈钢, 聚光太阳能发电站 (CSP)

Abstract：

The effect of Mg on purification of molten salts MgCl₂-NaCl-KCl (MNKC) and corrosion behavior of 316H stainless steel in MNKC molten salts were investigated by means of immersion test and electrochemical means. Results indicated that the corrosion of 316H stainless steel in MNKC molten salts at 600 ℃ was well inhibited when the addition amount of Mg exceeds 500 μg·g^-1, correspondingly, 316H stainless steel presents the free corrosion potential of E_corr＜-0.80 V vs NiCl₂/Ni, corrosion current density of I_corr＜25 μA/cm², and linear polarization resistance of R_p＞800 Ω·cm². The purification and corrosion inhibition mechanism of Mg for the MNKC molten salts were discussed simultaneously.

Key words： chloride molten salt corrosion mitigation 316H stainless steel concentrated solar power (CSP)

收稿日期: 2020-01-17

ZTFLH:

TG174

基金资助:中国科学院战略性先导科技专项(XDA21000000)

通讯作者: 左勇 E-mail: zuoyong@sinap.ac.cn

Corresponding author: ZUO Yong E-mail: zuoyong@sinap.ac.cn

作者简介: 左勇，男，1978年生，博士，副研究员

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引用本文:

左勇, 曹明鹏, 申淼, 杨新梅. MgCl₂-NaCl-KCl熔盐体系中金属Mg对316H不锈钢的缓蚀性能研究[J]. 中国腐蚀与防护学报, 2021, 41(1): 80-86.
Yong ZUO, Mingpeng CAO, Miao SHEN, Xinmei YANG. Effect of Mg on Corrosion of 316H Stainless Steel in Molten Salts MgCl₂-NaCl-KCl. Journal of Chinese Society for Corrosion and protection, 2021, 41(1): 80-86.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2020.012 或 https://www.jcscp.org/CN/Y2021/V41/I1/80

图1 钨电极在600 ℃ MNKC熔盐体系中的循环伏安曲线

图2 316H不锈钢在600 ℃ MNKC熔盐体系的腐蚀电位随Mg添加量的变化曲线

图3 600 ℃下316H不锈钢在MNKC-Mg (0~1200 μg·g-1) 熔盐体系的极化曲线

图4 600 ℃下316H不锈钢在MNKC熔盐体系中的腐蚀电流密度随Mg添加量的变化曲线

图5 600 ℃下316H不锈钢在MNKC熔盐体系中的线性极化电阻随Mg添加量的变化曲线

图6 钨电极在600 ℃的MNKC-0.2%CrCl2熔盐体系中的循环伏安曲线

表1 循环伏安曲线氧化还原峰归属汇总

图7 600 ℃下MNKC-500 μg·g-1 Mg体系浸泡100 h后316H不锈钢截面SEM像

图8 600 ℃下MNKC体系浸泡100 h后316H不锈钢截面SEM像

1	Myers P D, Goswami D Y. Thermal energy storage using chloride salts and their eutectics [J]. Appl. Therm. Eng., 2016, 109: 889
2	Xu X K, Wang X X, Li P W, et al. Experimental test of properties of KCl-MgCl₂ eutectic molten salt for heat transfer and thermal storage fluid in concentrated solar power systems [J]. J. Sol. Energy Eng., 2018, 140: 051011
3	Xu X K, Dehghani G, Ning J X, et al. Basic properties of eutectic chloride salts NaCl-KCl-ZnCl₂ and NaCl-KCl-MgCl₂ as HTFs and thermal storage media measured using simultaneous DSC-TGA [J]. Sol. Energy, 2018, 162: 431
4	Li Y Y, Xu X K, Wang X X, et al. Survey and evaluation of equations for thermophysical properties of binary/ternary eutectic salts from NaCl, KCl, MgCl₂, CaCl₂, ZnCl₂ for heat transfer and thermal storage fluids in CSP [J]. Sol. Energy, 2017, 152: 57
5	Hu B H, Ding J, Wei X L, et al. Test of thermal physics and analysis on thermal stability of high temperature molten salt [J]. Inorgan. Chem. Ind., 2010, 42(1): 22
5	胡宝华, 丁静, 魏小兰等. 高温熔盐的热物性测试及热稳定性分析 [J]. 无机盐工业, 2010, 42(1): 22
6	Ding W J, Bonk A, Bauer T. Corrosion behavior of metallic alloys in molten chloride salts for thermal energy storage in concentrated solar power plants: A review [J]. Front. Chem. Sci. Eng., 2018, 12: 564
7	Mohan G, Venkataraman M, Gomez-Vidal J, et al. Thermo-economic analysis of high-temperature sensible thermal storage with different ternary eutectic alkali and alkaline earth metal chlorides [J]. Sol. Energy, 2018, 176: 350
8	Pelton A D, Chartrand P. Thermodynamic evaluation and optimization of the LiCl-NaCl-KCl-RbCl-CsCl-MgCl₂-CaCl₂ system using the modified quasi-chemical model [J]. Metall. Mater. Trans., 2001, 32A: 1361
9	Sun L P, Wu Y T, Ma C F. Experimental study on optimization of molten salt for solar high temperature heat storage [J]. Acta Energ. Sol. Sin., 2008, 29: 1092
9	孙李平, 吴玉庭, 马重芳. 太阳能高温蓄热熔融盐优选的实验研究 [J]. 太阳能学报, 2008, 29: 1092
10	Patel N S, Pavlík V, Boča M. High-temperature corrosion behavior of superalloys in molten salts: A review [J]. Crit. Rev. Solid State Mater. Sci., 2017, 42: 83
11	Sun H, Su X Z, Zhang P, et al. Research status and progress of molten salts corrosion for concentrated solar thermal power [J]. Corros. Sci. Prot. Technol., 2017, 29: 282
11	孙华, 苏兴治, 张鹏等. 聚焦太阳能热发电用熔盐腐蚀研究现状与展望 [J]. 腐蚀科学与防护技术, 2017, 29: 282
12	Vignarooban K, Pugazhendhi P, Tucker C, et al. Corrosion resistance of Hastelloys in molten metal-chloride heat-transfer fluids for concentrating solar power applications [J]. Sol. Energy, 2014, 103: 62
13	Vindstad J E, Mediaas H, Østvold T. Hydrolysis of MgCl₂-containing melts [J]. Acta Chem. Scand., 1997, 51: 1192
14	Tzvetkoff T, Kolchakov J. Mechanism of growth, composition and structure of oxide films formed on ferrous alloys in molten salt electrolytes-a review [J]. Mater. Chem. Phys., 2004, 87: 201
15	Ding W J, Shi H, Xiu Y L, et al. Hot corrosion behavior of commercial alloys in thermal energy storage material of molten MgCl₂/KCl/NaCl under inert atmosphere [J]. Sol. Energy Mater. Sol. Cells, 2018, 184: 22
16	Raiman S S, Lee S. Aggregation and data analysis of corrosion studies in molten chloride and fluoride salts [J]. J. Nucl. Mater., 2018, 511: 523
17	Olander D. Redox condition in molten fluoride salts-Definition and control [J]. J. Nucl. Mater., 2002, 300: 270
18	Zeng C L, Zhang J Q, Wu W T. Electrochemistry of corrosion in molten salts [J]. Corros. Sci. Prot. Technol., 1992, 4: 16
18	曾潮流, 张鉴清, 吴维. 熔盐腐蚀电化学 [J]. 腐蚀科学与防护技术, 1992, 4: 16
19	Tian H Q, Du L C, Huang C L, et al. Enhanced specific heat capacity of binary chloride salt by dissolving magnesium for high-temperature thermal energy storage and transfer [J]. J. Mater. Chem., 2017, 5A: 14811
20	Jasien P G, Dykstra C E. An ab initio study of the stability and electronic structure of univalent magnesium salts [J]. Chem. Phys. Lett., 1984, 106: 276
21	Krumpelt M, Fischer J, Johnson I. Reaction of magnesium metal with magnesium chloride [J]. J. Phys. Chem., 1968, 72: 506
22	Garcia-Diaz B L, Olson L, Martinez-Rodriguez M, et al. High temperature electrochemical engineering and clean energy systems [J]. J. S. C. Acad. Sci., 2016, 14: 11
23	Mehrabadi B A T, Weidner J W, Garcia-Diaz B, et al. Modeling the effect of cathodic protection on superalloys inside high temperature molten salt systems [J]. J. Electrochem. Soc., 2017, 164: C171
24	Zhang M J, Li J D, Guo Q F. Recovery of magnesium from rejected magnesium alloy by vacuum sublimation process-magnesium alloy treating technology [J]. Light Met., 2006, (2): 48
24	张明杰, 李继东, 郭清富. 真空升华法从废镁合金中回收镁—镁合金无害化处理技术 [J]. 轻金属, 2006, (2): 48
25	Ding W J, Bonk A, Gussone J, et al. Electrochemical measurement of corrosive impurities in molten chlorides for thermal energy storage [J]. J. Energy Storage, 2018, 15: 408
26	Wang D H, Xiao W. Inert anode development for high-temperature molten salts [A].
26	Lantelme F, Groult H. Molten Salts Chemistry [M]. Oxford: Elsevier, 2013: 171
27	Sun H, Wang J Q, Li Z J, et al. Corrosion behavior of 316SS and Ni-based alloys in a ternary NaCl-KCl-MgCl₂ molten salt [J]. Sol. Energy, 2018, 171: 320
28	Martínez A M, Castrillejo Y, Børresen B, et al. Chemical and electrochemical behaviour of chromium in molten chlorides [J]. J. Electroanal. Chem., 2000, 493: 1

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