摘要
为验证石墨基柔性接地装置中石墨基柔性接地体对金属引下线腐蚀行为的影响。通过对镀锌板、铜金属、304不锈钢3种金属与石墨材料连接后进行模拟土壤包覆、强电解质土壤通电流等不同类型的加速腐蚀试验,并采用失重法、XRD以及极化曲线等方法,研究不同加速腐蚀试验类型对镀锌板、铜、不锈钢3种金属腐蚀行为的影响。结果表明,几种金属材料与石墨材料连接后的耐蚀顺序依次为304不锈钢>铜金属>镀锌钢,硫酸根离子浓度的增加会加速石墨接地材料对金属接地材料的腐蚀。石墨基柔性接地装置中引下线优选304不锈钢或304不锈钢与石墨复合材,镀锌钢表面的腐蚀产物具有明显的层状结构,内层腐蚀产物主要为Zn5(OH)8Cl2H2O、Fe4(OH)10SO4,外层腐蚀产物的含氧量高,质地较疏松,主要为SiO4和Zn。
Objective to verify the influence of graphite based flexible grounding body on corrosion behavior of metal down lead in graphite based flexible grounding device.Methods three kinds of accelerated corrosion tests were carried out to simulate soil coating,strong electrolyte soil current and other types of accelerated corrosion tests after connecting galvanized sheet,copper metal and 304 stainless steel with graphite material.The influence of different accelerated corrosion test types on corrosion behavior of galvanized sheet,copper and stainless steel was studied by weight loss method,XRD and polarization curve.Results the order of corrosion resistance was 304 stainless steel>copper metal>galvanized steel.The increase of sulfate ion concentration would accelerate the corrosion of graphite grounding materials to metal grounding materials.304 stainless steel or 304 stainless steel and graphite composite material is preferred for down lead of graphite based flexible grounding device,the corrosion products on the surface of galvanized steel have obvious layered structure,the main corrosion products of inner layer are Zn5(OH)8Cl2H2O,Fe4(OH)10SO4,and the outer corrosion products have high Oxygen content and loose texture,mainly SiO4 and Zn.
作者
张国锋
李景丽
李孟
Zhang Guofeng;Li Jingli;Li Meng(Henan SIDA Power Equipment Co.,Ltd.,Xuchang 461500,China;School of Electrical Engineering,Zhengzhou University,Zhengzhou 450000,China;Department of Electrical Engineering,Xingtai Polytechnic College,Xingtai 054000,China)
出处
《电子测量技术》
北大核心
2021年第3期16-21,共6页
Electronic Measurement Technology
关键词
极化曲线
柔性石墨
腐蚀电流密度
镀锌钢
铜金属
304不锈钢
polarization curve
flexible graphite
corrosion current density
galvanized steel
copper metal
304 stainless steel
