■■■■■■■■■■■■■■试验研究DOI:10.11973/fsyfh-202302001垃圾焚烧电站低温烟气侧腐蚀环境中几种金属材料的耐蚀性葛放,葛红花,于华强,李骥,张嘉琳,刘家满(上海电力大学上海热交换系统节能工程技术研究中心上海市电力材料防护与新材料重点实验室,上海200090)摘要:采用极化曲线、微区电化学测试和表面微观形貌观察等方法研究了两种双相不锈钢2205DSS和2507DSS、两种钛合金TA2和TA10在垃圾焚烧电站低温余热利用段换热器烟气侧灰水混合液中的腐蚀行为,比较了这4种金属材料的耐蚀性。结果表明:两种双相不锈钢的耐蚀性均随浸泡时间的增加而下降,浸泡3d后表面均出现电流密度突增的活性位点,表面发生点蚀;2205DSS在浸泡8d后出现了全面腐蚀,其耐蚀性最差;在试验过程中,两种钛合金未见明显腐蚀,其耐蚀性能明显优于两种双相不锈钢。关键词:双相不锈钢;钛合金;垃圾焚烧电站;灰水混合液;点蚀中图分类号:TG172文献标志码:A文章编号:1005-748X(2023)02-0001-06CorrosionResistanceofSeveralMetalMaterialsinCorrosiveEnvironmentofLow-TemperatureFlueGasinaWasteIncinerationPowerPlantGEFang,GEHonghua,YUHuaqiang,LIJi,ZHANGJialin,LIUJiaman(ShanghaiKeyLaboratoryofMaterialsProtectionandAdvancedMaterialsinElectricPower,ShanghaiEngineeringResearchCenterofEnergy-SavinginHeatExchangeSystems,ShanghaiUniversityofElectricPower,Shanghai200090,China)Abstract:Corrosionbehavioroftwoduplexstainlesssteels2205DSSand2507DSS,twotitaniumalloysTA2andTA10inmixedsolutionofashandwateronthefluegassideofalow-temperatureheatexchangerforwasteheatutilizationinawasteincinerationpowerplantwasstudiedbypolarizationcurve,micro-areaelectrochemicaltestingandmicroscopicsurfacemorphologyobservation.Andthecorrosionresistanceofthesemetalswascompared.Theresultsshowedthatthecorrosionresistanceof2205DSSand2507DSSdecreasedwiththeincreaseofimmersiontime.After3daysofimmersion,activesiteswherecurrentdensityincreasedsuddenlyappeared,andpittingcorrosionoccurredonthesurfaceof2205DSSand2507DSS.2205DSSwasgeneralcorrodedafter8daysofimmersion,showingthelowestcorrosionresistanceinthefourmetals.TherewasnoobviouscorrosionoccurredinTA2andTA10duringtest,andtheircorrosionresistancewassignificantlybetterthant...
