Q235钢在鹰潭酸性土壤中不同强度直流杂散电流作用下的腐蚀行为

发布时间：2018-05-07 13:15

本文选题：Q钢 + 直流杂散电流　；参考：《材料保护》2015年09期

【摘要】：目前,国内鲜见关于Q235钢在直流杂散电流和酸性土壤联合作用下腐蚀行为的报道。通过失重法、电化学阻抗谱、显微镜、扫描电镜和X射线衍射法等,研究了直流杂散电流大小对Q235钢在含水率为30%和40%的鹰潭酸性土壤中腐蚀特性的影响。结果表明:土壤含水率和直流杂散电流对Q235钢的腐蚀行为有较强影响,其表面呈现局部腐蚀,电化学阻抗(EIS)谱为偏心的半圆;土壤的含水率相同时,EIS谱的容抗弧随着直流杂散电流的增加而减小,腐蚀速率和最大点蚀深度随着直流杂散电流的增加而增大;Q235钢在含水率为30%的土壤中的腐蚀快于在含水率为40%的土壤中的。
[Abstract]:At present, there are few reports on the corrosion behavior of Q235 steel under the combined action of DC stray current and acidic soil. By means of weightlessness, electrochemical impedance spectroscopy, microscope, scanning electron microscope and X-ray diffraction, the effect of DC stray current on the corrosion characteristics of Q235 steel in Yingtan acid soil with water content of 30% and 40% was studied. The results show that soil moisture content and DC stray current have a strong effect on the corrosion behavior of Q235 steel. The surface of Q235 steel exhibits local corrosion, and the electrochemical impedance spectroscopy (EIS) is eccentric semicircle. When the soil moisture content is the same, the capacitive resistance of EIS decreases with the increase of DC stray current. The corrosion rate and maximum pitting depth increase with the increase of DC stray current. The corrosion rate of Q235 steel in soil with water content of 30% is faster than that in soil with water content of 40%.
【作者单位】：国网湖北省电力公司电力科学研究院;
【分类号】：TG142.1

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