第45卷第3期(总第360期)电镀与精饰2023年3月复合缓蚀剂在软化水中对低碳钢的协同缓蚀作用康保生1,齐心2,齐千一3,杨红健1*(1.河北工业大学化工学院,天津300400;2.承德盛金维保温材料有限公司,河北承德067400;3.广东工业大学材料与能源学院,广东广州511442)摘要:采用静态失重法、电化学测试和表面表征技术研究了环境友好型复合缓蚀剂对低碳钢在软化水中的缓蚀作用。结果表明,钼酸钠、硅酸钠、四硼酸钠和葡萄糖酸钠4种单组分缓蚀剂在成本和缓蚀率上都不具有优势,复合缓蚀剂的缓蚀率远高于相同剂量的单组分缓蚀剂。浓度为140mg/L的复合缓蚀剂在温度50℃和浸泡时间72h条件下的缓蚀率为84.77%。当温度改变后,缓蚀率变化较小,说明复合缓蚀剂具有一定的稳定性。扫描电镜(SEM)表面观察证实了复合缓蚀剂在碳钢表面的腐蚀抑制作用,通过光电子能谱(XPS)分析推测了复合缓蚀剂对腐蚀的抑制机理,从而阐明碳钢表面缓蚀剂的协同保护机制。关键词:复合缓蚀剂;低碳钢;软化水;缓蚀机理中图分类号:TG174.42文献标识码:ASynergisticcorrosioninhibitioneffectofcompositecorrosioninhibitoroncarbonsteelinsoftenedwaterKangBaosheng1,QiXin2,QiQianyi3,YangHongjian1*(1.SchoolofChemicalEngineering,HebeiUniversityofTechnology,Tianjin300400,China;2.ChengdeShengjinweiThermalInsulationMaterialsCo.Ltd.,Chengde067400,China;3.SchoolofMaterialsandEnergy,GuangdongUniversityofTechnology,Guangzhou511442,China)Abstract:Thecorrosioninhibitioneffectofenvironmentallyfriendlycompoundcorrosioninhibitoroncarbonsteelinsoftenedwaterwasstudiedbystaticweightlossmethod,electrochemicaltestandsurfacecharacterization.Theresultsshowthatsodiummolybdate,sodiumsilicate,sodiumtetraborateandsodiumgluconatehavenoadvantagesintermsofcostandinhibitionefficiency,andtheinhibitionefficiencyofthecompositeinhibitorismuchhigherthanthatofthesinglecomponentinhibitoratthesamedose.Thecorrosioninhibitionefficiencyofthecompositeinhibitorwithconcentrationof140mg/Lwas84.77%atthetemperatureof50℃andsoakingtimeof72h.Whenthetemperaturechanges,thecorrosioninhibitionefficiencychangeslittle,indicatingthatthecompositecorrosioninhibitorhasacertainstability.SEMsurfaceobservationcon...