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Research on electrochemical corrosion behavior of diaphragm in hydrogen chloride diaphragm pump
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Fengyi CAI1, Yinghua CHEN1, 2, Haisheng LI1, 2, Jukai CHEN1, 2, Jingliang ZHANG3, Xun ZHANG1, Zheng ZHANG1
Fluid Machinery | 2025, 53(2) : 1 - 7
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Fluid Machinery | 2025, 53(2): 1-7
Research on electrochemical corrosion behavior of diaphragm in hydrogen chloride diaphragm pump
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Fengyi CAI1, Yinghua CHEN1, 2, Haisheng LI1, 2, Jukai CHEN1, 2, Jingliang ZHANG3, Xun ZHANG1, Zheng ZHANG1
Affiliations
  • 1School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China
  • 2Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China
  • 3Jiangsu Zhongneng Silicon Industry Technology Development Co., Ltd., Xuzhou 221000, China
Published: 2025-02-28 doi: 10.3969/j.issn.1005-0329.2025.02.001
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In order to investigate the electrochemical corrosion behavior of hydrogen chloride diaphragm pump membranes in high-chloride and high-temperature hydrogen chloride environments, Tafel polarization method and Electrochemical Impedance Spectroscopy (EIS) were employed to analyze the corrosion resistance of the membranes. The corrosion samples of the membranes under different operating conditions were analyzed by SEM, EDS, and XPS testing methods. The results indicate that 301L stainless steel membranes suffer severe corrosion in hydrogen chloride environments, with no stable passivation region observed in the polarization curves. With increasing solution concentration and temperature, the self-corrosion current density increases, leading to a decrease in corrosion resistance. The stainless steel membranes exhibit high sensitivity to temperature. The charge transfer resistance in a 90 ℃ HCl solution environment is 3.682, which is only 6.7% of that at 50 ℃. The corrosion current density is 1.258×10-2 A/cm2, which is 3.94 times that at 50 ℃, and the ion diffusion rate accelerates. Competition for Cl- adsorption makes it difficult for oxides in the corrosion products to maintain stability, hindering the formation of a passive film on the surface, thus leading to the occurrence of pitting corrosion in stainless steel. These findings provide a basis and reference for the study and design of corrosion-resistant membranes for diaphragm pumps.

diaphragm pump  /  diaphragm  /  HCl solution  /  electrochemical corrosion  /  corrosion behavior
蔡丰义, 陈英华, 李海生, 陈聚凯, 张敬亮, 张勋, 张政. 氯化氢隔膜泵膜片电化学腐蚀行为研究. 流体机械, 2025 , 53 (2) : 1 -7 . DOI: 10.3969/j.issn.1005-0329.2025.02.001
Fengyi CAI, Yinghua CHEN, Haisheng LI, Jukai CHEN, Jingliang ZHANG, Xun ZHANG, Zheng ZHANG. Research on electrochemical corrosion behavior of diaphragm in hydrogen chloride diaphragm pump[J]. Fluid Machinery, 2025 , 53 (2) : 1 -7 . DOI: 10.3969/j.issn.1005-0329.2025.02.001
Appendix
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Year 2025 volume 53 Issue 2
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Article Info
doi: 10.3969/j.issn.1005-0329.2025.02.001
  • Receive Date：2024-01-09
  • Online Date：2026-10-15
  • Published：2025-02-28
Article Data
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History
  • Received：2024-01-09
  • Revised：2024-05-10
Affiliations
    1School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China
    2Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China
    3Jiangsu Zhongneng Silicon Industry Technology Development Co., Ltd., Xuzhou 221000, China
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https://castjournals.cast.org.cn/joweb/ltjx/EN/10.3969/j.issn.1005-0329.2025.02.001
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表12种不同金属材料的力学参数
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Family		 属数
Number of
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Number of
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Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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