摘要
采用开路电位(OCP)测试、动电位极化曲线测试、电化学阻抗谱(EIS)测量、挂片干湿循环浸泡试验,研究浸泡时间、酰胺有机阻锈剂浓度对含3.5%NaCl混凝土模拟孔隙液中Q235电化学和锈蚀行为的影响。结果表明:酰胺阻锈剂分子可以吸附在Q235表面,抑制Cl^-对基体的破坏,起到阻锈作用;随酰胺阻锈剂浓度增大,相应的电化学阻抗弧增大,破钝电位增高,腐蚀电流密度减小,干湿循环挂片腐蚀程度减轻,可知Q235表面的酰胺吸附膜更加致密,阻锈效率提高。
The inhibition behavior of amide concentration and immersion time on Q235 reinforcing steel surface in 3.5%NaCl simulated concrete pore solution were studied by open circuit potential tests(OCP),Electrochemical impedance spectrums(EIS),potentiodynamic polarization tests and wetting-drying tests.The results show that,the amide molecule can be adsorbed on the Q235 surface,inhibiting the damage of Cl- to the matrix and resisting corrosion.With the amide concentration increasing,the Q235 samples show larger radius of the capacitive loop,more positive pitting breakdown potential(Eb)and smaller corrosion current density(Icorr),and it indicates that the amideadsorption film on the surface of Q235 is more intact.Combining with the corrosion morphology of Q235 coupons,the inhibition efficiency increases with the increase of the amide inhibitor concentration.
作者
陈启荣
周霄骋
蔡景顺
吕远波
石亮
刘建忠
CHEN Qirong;ZHOU Xiaocheng;CAI Jingshun;LU Yuanbo;SHI Liang;LIU Jianzhong(Wuhan Municipal Construction Group Co.,Ltd.,Wuhan,430056,China;State Key Laboratory of High Performance Civil Engineering Materials,Jiangsu Research Institute of Building Science,Nanjing,211100,China;Jiangsu Sobute New Materials Co.Ltd.,Nanjing,211103,China)
出处
《混凝土》
CAS
北大核心
2019年第12期64-68,共5页
Concrete
基金
国家重点研发计划资助(2017YFB0309904)
江苏省自然科学基金资助(BK20160104)
重点工程研发项目资助(DG1-T02-2017,ZXGS-KJ-01)
关键词
酰胺
有机阻锈剂
腐蚀
混凝土模拟液
Cl-
amides
organic inhibitor
corrosion
simulated concrete pore solution
Cl^-
作者简介
第一作者:陈启荣(1975-),男,高级工程师,从事市政工程管理和施工。联系地址:武汉市沌□经济开发区春晓路6号,武汉市市政建设集团有限公司(430023),联系电话:13971260532;通讯作者:周霄骋(1991-),女,硕士研究生,从事钢筋混凝土耐久性及金属腐蚀与防护研究。联系电话:15365067122。
