DOI:10.11973/fsyfh-202212007Q355B钢筋在川藏铁路地区土壤模拟液中的腐蚀行为李伟光1,2,潘吉林1,2,肖盼1,2(1.电信科学技术第五研究所有限公司,成都610062;2.四川成都土壤环境材料腐蚀国家野外科学观测研究站,成都610062)摘要:通过极化曲线和电化学阻抗谱测试,研究了在川藏铁路地区土壤模拟液中添加不同浓度的氯化钠、硫酸钠、硝酸钾和碳酸钠溶液和不同试验温度对Q355B碳钢腐蚀行为的影响。结果表明:当氯化钠、硫酸钠、硝酸钾和碳酸钠的添加量低于0.3%(质量分数)时,阴阳离子浓度的增大对Q355B钢腐蚀的影响较轻微;当氯化钠、硫酸钠和硝酸钾添加量达到1mol/L时,Q355B钢在添加不同溶液的模拟液中的腐蚀轻重程度依次为氯化钠、硫酸钠、硝酸钾,Q355B钢表面未见明显锈蚀和点蚀痕迹,钢表面可以维持钝化状态;在模拟液中,随着温度的升高,Q355B钢的腐蚀速率逐渐增大,70℃下Q355B钢的腐蚀速率约是15℃下的2.2倍。关键词:川藏地区;土壤模拟液;腐蚀;极化曲线;电化学阻抗谱中图分类号:TG174文献标志码:A文章编号:1005-748X(2022)12-0042-06CorrosionBehaviorofQ355BSteelBarinSimulatedSoilSolutionofSichuan-TibetRailwayAreaLIWeiguang1,2,PANJilin1,2,XIAOPan1,2(1.TheFifthResearchInstituteofTelecommunicationsTechnologyCo.,Ltd.,Chengdu610062,China;2.SichuanChengduSoilEnvironmentalMaterialCorrosionNationalObservationandResearchStation,Chengdu610062,China)Abstract:Theeffectsofdifferentconcentrationsofsodiumchloride,sodiumsulfate,potassiumnitrateandsodiumcarbonatesolutioninSichuan-TibetrailwaysoilsimulationsolutionanddifferenttesttemperaturesonthecorrosionbehaviorofQ355Bcarbonsteelwerestudiedbypolarizationcurvesandelectrochemicalimpedancespectroscopy.Theresultsshowedthatwhentheadditionofsodiumchloride,sodiumsulfate,potassiumnitrateandsodiumcarbonatewaslessthan0.3%,theincreaseofanionandcationconcentrationhadaslighteffectonthecorrosionofQ355Bsteel.Whentheadditionofsodiumchloride,sodiumsulfateandpotassiumnitratereached1mol/L,thecorrosionseverityofQ355Bsteelinthesimulatedsolutionwithdifferentsolutionswassodiumchloride,sodiumsulfateandpotassiumnitrateinturn,andtherewasnoobviouscorrosionandpittingtraceonthesurfaceofQ355Bsteel,andthesteelsurfacecouldmaintainpassivationstate...
