流体机械2025，Vol.53Issue(2)：1-7,32,8.DOI:10.3969/j.issn.1005-0329.2025.02.001
氯化氢隔膜泵膜片电化学腐蚀行为研究
Research on electrochemical corrosion behavior of diaphragm in hydrogen chloride diaphragm pump
摘要
Abstract
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.关键词
隔膜泵/膜片/HCl溶液/电化学腐蚀/腐蚀行为Key words
diaphragm pump/diaphragm/HCl solution/electrochemical corrosion/corrosion behavior分类
机械工程引用本文复制引用
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[J].流体机械,2025,53(2):1-7,32,8.基金项目
国家自然科学基金项目(52206215) （52206215）
