钢筋阻锈剂在碳化钢筋混凝土中的阻锈作用  

Effect of Steel Bar Corrosion Inhibitors in Carbonated Reinforced Concrete

作　　者：郭群 李晓珍 宋屹林 柳俊哲 GUO Qun;LI Xiaozhen;SONG Yilin;LIU Junzhe(College of Architecture Engineering,Qingdao Agricultural University,Qingdao 266109,China;School of Civil and Environmental Engineering,Ningbo University,Ningbo 315211,China)

机构地区：[1]青岛农业大学建筑工程学院,山东青岛266109 [2]宁波大学土木与环境工程学院,浙江宁波315211

出　　处：《建筑材料学报》2023年第1期21-28,共8页Journal of Building Materials

基　　金：国家自然科学基金资助项目(52178223,51778302)。

摘　　要：研究了阳极型阻锈剂Na_(2)CrO_(4)和Na_(2)MoO_(4)、阴极型阻锈剂苯并三氮唑(BTA)和N,N-二甲基乙醇胺(DMEA),以及由这些阻锈剂复配得到的复合型阻锈剂在碳化钢筋混凝土中的阻锈作用,通过钢筋的自然电位、腐蚀面积率、失重率和电化学法研究了钢筋在碳化混凝土中的腐蚀程度和腐蚀速率.结果表明:碳化混凝土中钢筋的抗腐蚀性随着阻锈剂掺量的增加而提高,随着碳化时间的增加而降低;复掺1.00%Na_(2)MoO_(4)和1.00%BTA时,碳化混凝土中钢筋的腐蚀程度最小,阻锈剂的阻锈效果最佳;复合型阻锈剂延缓钢筋腐蚀速率的效果优于单一型阻锈剂,同一掺量条件下,复掺Na_(2)MoO_(4)和BTA阻锈剂延缓钢筋腐蚀速率的效果最佳.The effect of different types of corrosion inhibitors,such as anodic corrosion inhibitors Na_(2)CrO_(4)and Na_(2)MoO_(4),cathodic corrosion inhibitors benzotriazole(BTA)and N,N-dimethylethanolamine(DMEA),and their combination on the corrosion inhibition of steel bars in carbonated reinforced concrete was investigated.The corrosion degree and corrosion rate of steel bars in carbonated reinforced concrete were evaluated by spontaneous potential,corrosion area percent and mass loss percent of steel bars and electrochemical method.The results show that the corrosion resistance of steel bars in carbonated reinforced concrete increases with the increase of corrosion inhibitor content and decreases with the increase of carbonation time.The corrosion degree of steel bars in carbonated reinforced concrete with 1.00%Na_(2)MoO_(4)and 1.00%BTA addition is the least among all the specimens and the corrosion inhibition effect is the best.The effect of compound corrosion inhibitor on retarding corrosion rate of steel bars is better than that of single corrosion inhibitor,and the effect of adding the combination of Na_(2)MoO_(4)and BTA is the best.

关 键 词：钢筋混凝土 碳化 阻锈剂 腐蚀程度 腐蚀速率 

分 类 号：TU528.1[建筑科学—建筑技术科学]