DOI:10.11973/fsyfh-202302004热处理冷却方式对316-Q345复合钢筋耐蚀性的影响李琳1,2,陈义庆1,2,钟彬1,2,艾芳芳1,2,高鹏1,2,伞宏宇1,2,苏显栋1,2,沙楷智1,2(1.海洋装备用金属材料及其应用国家重点实验室,鞍山114009;2.鞍钢集团钢铁研究院,鞍山114009)摘要:通过显微组织观察、全浸腐蚀试验和电化学测试等方法研究了热处理冷却方式对316-Q345复合钢筋耐蚀性的影响。结果表明:冷却速率的增加促使316不锈钢覆层钝化膜更为致密、维持钝化能力和耐点蚀性能更强;复合钢筋结合界面的电极电位均介于碳钢电位与不锈钢电位之间,冷却速率的降低有利于提高结合界面的耐蚀性以及覆层与芯材的冶金结合,但也会导致覆层中合金元素稀释程度提高,从而降低覆层的耐蚀性。关键词:冷却方式;复合钢筋;耐蚀性;电化学腐蚀中图分类号:TG174文献标志码:A文章编号:1005-748X(2023)02-0019-06EffectofCoolingMethodofHeat-TreatmentonCorrosionResistanceof316-Q345CompositeSteelBarsLILin1,2,CHENYiqing1,2,ZHONGBin1,2,AIFangfang1,2,GAOPeng1,2,SANHongyu1,2,SUXiandong1,2,SHAKaizhi1,2(1.StateKeyLaboratoryofMetalMaterialforMarineEquipmentandApplication,Anshan114009,China;2.Iron&SteelResearchInstituteofAnsteel,Anshan114009,China)Abstract:Theeffectsofcoolingmethodsofheat-treatmentonthecorrosionresistanceof316-Q345compositesteelbarswerestudiedbymeansofmicrostructureobservation,fullimmersioncorrosiontestandelectrochemicaltesting.Theresultsshowedthattheincreaseofcoolingratemadethepassivationfilmof316stainlesssteelcoatingmorecompact,boththepassivationabilityandthepittingresistancehigher.Theelectrodepotentialsofthebondinginterfaceswerebetweenthoseofthecarbonsteelandstainlesssteel.Thedecreaseofcoolingratewasbeneficialtoimprovethecorrosionresistanceofthebondinginterfacesandthemetallurgicalbondingbetweenthecoatingsandthecorematerial,butalsoledtotheincreaseofthedilutiondegreeofalloyingelementsinthecoating,thusreducingthecorrosionresistanceofthecoating.Keywords:coolingmethod;compositesteelbar;corrosionresistance;electrochemicalcorrosion近半个世纪以来,人们发现钢筋混凝土材料并非是一种能够长时间服役的建筑材料,尤其是在严酷的海洋环境中,钢筋腐蚀被认为是降低沿海地区土木工程耐久性的最主要...
