烷基酚聚氧乙烯醚对混凝土中钢筋氯盐耐蚀性的影响  

Effect of Alkylphenol Polyoxyethylene Ether on Corrosion Resistance of Chloride Salts for Steel Bars in Concrete

作　　者：刘伟 LIU Wei(China Railway 19th Bureau Group First Engineering Co.,Ltd.,Liaoyang 111000,China)

机构地区：[1]中铁十九局集团第一工程有限公司,辽宁辽阳111000

出　　处：《水电能源科学》2024年第10期101-104,共4页Water Resources and Power

基　　金：西南交通大学与中铁十九局集团第一工程有限公司合作科技项目(CR1901-NCGJGSGLSG2-03)。

摘　　要：为研究不同浓度的烷基酚聚氧乙烯醚(APEO)缓蚀阻锈效果,开展钢筋电化学试验,研究不同APEO浓度对钢筋电化学行为和缓蚀效果的影响。结果表明,随着APEO浓度的增加,钢筋的电化学行为出现三阶段变化特征,即激发—抑制—再激发;当APEO浓度达30mg/L时,腐蚀溶液中钢筋表面阻抗最大,腐蚀电流最小,电化学反应强度最弱;当APEO浓度过低时,在钢筋表面难以形成包裹完整的钝化膜;当APEO浓度过高时,作为金属络合物的APEO易与钢筋表面Fe发生络合反应,加剧钢筋腐蚀反应。因此,掺入一定浓度的APEO,可有效提高钢筋抗腐蚀性,延长钢筋混凝土结构在Cl^(-)腐蚀环境下的服役寿命。To study the corrosion and rust inhibition effects of alkylphenol polyoxyethylene ether(APEO)at different concentrations,electrochemical tests were conducted on steel bars to investigate the influence of different APEO concentrations on the electrochemical behavior and corrosion inhibition effect of steel bars.The results show that with the increase of APEO concentration,the electrochemical behavior of steel bars exhibits a three-stage change characteristics:excitation,inhibition and re-excitation;When the APEO concentration reaches 30 mg/L,the surface impedance of the steel bar in the corrosion solution is the highest,the corrosion current is the lowest,and the electrochemical reaction intensity is the weakest;When the APEO concentration is too low,it is difficult to form a complete passivation film on the surface of the steel bar;When the concentration is too high,APEO,as a metal complex,is prone to complexation reaction with Fe on the surface of steel bars,exacerbating the corrosion reaction of steel bars.Therefore,adding a certain concentration of APEO can effectively improve the corrosion resistance of steel bars and prolong the service life of reinforced concrete structures in Cl^(-)corrosive environments.

关 键 词：烷基酚聚氧乙烯醚 Cl^(-)腐蚀 阻蚀 阻抗谱 浓度依赖性 

分 类 号：TV331[水利工程—水工结构工程]