DOI:10.11973/fsyfh-202212002Q235碳钢在宜宾不同大气环境中的腐蚀行为李成鑫1,王志高2,海潮3,王方强2,庞雅洁3,石建国4,严军4,蒋益强4,杜翠薇3,李晓刚3(1.国网四川省电力公司,成都610041;2.国网四川省电力公司电力科学研究院,成都610041;3.北京科技大学腐蚀与防护中心,北京100083;4.国网四川省电力公司宜宾供电公司,宜宾644000)摘要:通过室外暴露试验和电化学测试,研究了电网设备主要金属材料Q235碳钢在四川宜宾地区不同大气环境中的腐蚀行为。结果表明:在四川宜宾A、B、C三个变电站环境中,Q235碳钢的平均腐蚀速率分别为19.68μm/a、41.40μm/a和28.75μm/a,其表面腐蚀产物主要由α-FeOOH、γ-FeOOH和Fe3O4组成,在B和C变电站环境中,Q235碳钢表面腐蚀产物中的α-FeOOH含量较高;在B变电站环境中,Q235碳钢的腐蚀电流密度最大,膜层电阻最小,说明其表面锈层对基体的保护性能较差。关键词:输变电设备;Q235碳钢;大气腐蚀;电化学测试中图分类号:TG174文献标志码:A文章编号:1005-748X(2022)12-0006-05CorrosionBehaviorofQ235CarbonSteelinDifferentAtmosphereEnvironmentsinYibinLIChengxin1,WANGZhigao2,HAIChao3,WANGFangqiang2,PANGYajie3,SHIJianguo4,YANJun4,JIANGYiqiang4,DUCuiwei3,LIXiaogang3(1.StateGridSichuanElectricPowerCompany,Chengdu610041,China;2.StateGridSichuanElectricPowerResearchInstitute,Chengdu610041,China;3.CorrosionandProtectionCenter,UniversityofScienceandTechnologyBeijing,Beijing100083,China;4.StateGridYibinPowerSupplyCompany,Yibin644000,China)Abstract:Throughoutdoorexposuretestandelectrochemicaltest,thecorrosionbehaviorofQ235carbonsteel,themainmetalmaterialofpowergridequipment,indifferentatmosphericenvironmentsinYibin,SichuanProvincewasstudied.TheresultsshowedthattheaveragecorrosionratesofQ235carbonsteelintheenvironmentsofA,BandCsubstationswere19.68μm/a,41.40μm/aand28.75μm/a,respectively.ThecorrosionproductsonthesurfaceofQ235carbonsteelweremainlycomposedofα-FeOOH,γ-FeOOHandFe3O4.Thecontentofα-FeOOHonthesurfaceofQ235carbonsteelintheenvironmentofBandCsubstationswasrelativelyhigh.InBsubstationenvironment,thecorrosioncurrentdensityofQ235carbonsteelwasthehighestandthefilmresistancewasthelowest,whichshowedthatthesurfacerustlayerhadpoorpr...
