阳极阻锈剂对含氯盐混凝土内钢筋的阻锈效果研究  

Study on the rust-inhibiting effect of anode rust inhibitor on steel bar in concrete containing chloride salt

作　　者：梅侃泽 林鑫源 舒海斌 柳俊哲[1] MEI Kanze;LIN Xinyuan;SHU Haibin;LIU Junzhe(Faculty of Architectural,Civil Engineering and Environment,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211

出　　处：《混凝土》2023年第1期82-86,91,共6页Concrete

基　　金：国家自然科学基金(51778302)。

摘　　要：通过选取目前市面上常用的两种阳极型阻锈剂(铬酸钠Na_(2)CrO_(4)、钼酸钠Na_(2)MoO_(4)),采用自然电位法、钢筋失重法、线性极化法和X-射线光电子能谱(XPS),研究阳极阻锈剂在含氯盐混凝土中的阻锈性能。研究结果表明:在Na_(2)CrO_(4)作用时,钢筋表面铁元素的钝化物主要由FeOOH和FeO组成;在Na_(2)MoO_(4)作用时,钢筋表面铁元素的钝化物主要由FeOOH、FeO、Fe_(2)O_(3)、Fe_(3)O_(4)组成,致使在养护龄期相同的条件下,钼酸钠阻锈剂阻锈的效果要优于铬酸钠;在养护龄期3个月时,未掺阳极阻锈剂的钢筋混凝土试件腐蚀速度与钢筋损失率较掺阳极阻锈剂的试件严重约40%。By selecting two commonly used anode rust inhibitors on the market(sodium chromate Na_(2)CrO_(4),sodium molybdate Na_(2)MoO_(4)),using spontaneous potential method,steel weight loss method,linear polarization method and X-ray photoelectron spectroscopy(XPS)to study the rust inhibitor performance of anode rust inhibitor in chloride-containing concrete.The research results show that under the action of Na_(2)CrO_(4),the passivation of iron on the surface of the steel bar is mainly composed of FeOOH and FeO.Under the action of Na_(2)MoO_(4),the passivation of the iron element on the surface of the steel bar is mainly composed of FeOOH,FeO,Fe_(2)O_(3),Fe_(3)O_(4),which leads to better anti-rust effect of sodium molybdate rust inhibitor than sodium chromate when the curing age is the same.At the curing age of three months,the corrosion rate and steel loss rate of reinforced concrete specimens without anode rust inhibitors are about 40%more serious than those with anode rust inhibitors.

关 键 词：钢筋腐蚀 含氯盐混凝土 阳极型阻锈剂 铬酸钠 钼酸钠 

分 类 号：TU528.042.6[建筑科学—建筑技术科学]