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[目的]研究不同电流密度与频率的交流干扰对Q235钢在红壤中腐蚀行为的影响。[方法]在实验室模拟交流杂散电流干扰环境，对Q235钢进行24 h红壤腐蚀实验；采用光学显微镜、扫描电镜(SEM)观察Q235钢腐蚀前后的表面形貌，利用X射线衍射(XRD)分析腐蚀产物组成，结合电位-时间曲线与失重法分析腐蚀规律。[结果]Q235钢的腐蚀速率随电流密度增大而升高，随频率升高呈先增后减趋势。腐蚀电位呈正弦波动且出现净负移，其负移量与振幅均随电流密度增大而增大，并随频率升高先增后减。试样表面腐蚀产物以Fe_2O3为主，含少量Fe_3O4及来自土壤的SiO2。[结论]本文的研究结果可为红壤地区接地材料的腐蚀防护提供参考。
Abstract：[Objective] The effect of alternating current(AC) interference with different current densities and frequencies on the corrosion behavior of Q235 steel in red soil needs to be studied. [Method] A laboratory simulation of an AC stray current interference environment was conducted, subjecting Q235 steel to a 24-hour corrosion test in red soil. The surface morphology of the steel before and after corrosion was observed using optical microscope and scanning electron microscope(SEM). The composition of corrosion products was analyzed by X-ray diffraction(XRD). The corrosion behavior was further analyzed by combining potential–time curve measurement with the weighing method. [Result] The corrosion rate of Q235 steel was increased with the rising of current density, while it initially increased and then decreased with the increasing of frequency. The corrosion potential exhibited sinusoidal fluctuation with a net negative shift; both the extent of this negative shift and the potential amplitude increased with current density and showed a trend of initial increase followed by decrease with the increasing frequency. The main corrosion product on the specimen surface was Fe_2O3, accompanied by small amounts of Fe_3O4 and SiO2 from the soil. [Conclusion] The findings of this study can provide a reference for the corrosion protection of grounding materials in red soil regions.
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基本信息:
DOI：10.19289/j.1004-227x.2026.01.018
中图分类号:TG172.4
引用信息:
[1]刘欣,李冠华,裴锋,等.交流干扰下Q235钢在红壤中的腐蚀行为研究[J].电镀与涂饰,2026,45(01):139-148.DOI:10.19289/j.1004-227x.2026.01.018.
基金信息:
国家电网有限公司总部管理科技项目资助“多源复杂路径杂散电流特征参量及危害评价与治理关键技术研究”(5500-202325165A-1-1-ZN)