新型阻锈剂的合成及对混凝土钢筋性能的影响  

Synthesis of a new corrosion inhibitor and its influence on the properties of concrete reinforcement

作　　者：张冀男 史兰香[2] ZHANG Ji’nan;SHI Lanxiang(FESCO Adecco Human Resources Service Shanghai Company Limited,Shanghai 200010,China;School of Chemical Engineering,Shijiazhuang University,Shijiazhuang,Hebei 050035,China)

机构地区：[1]北京外企德科人力资源服务上海有限公司,上海200010 [2]石家庄学院化工学院,河北石家庄050035

出　　处：《河北工业科技》2025年第2期146-151,171,共7页Hebei Journal of Industrial Science and Technology

基　　金：河北省重点研发计划项目(21321401D)。

摘　　要：为了解决严酷环境下混凝土钢筋的锈蚀问题,以对苯二异氰酸酯或对苯二异硫氰酸酯与化合物(I)缩合合成了6种新型阻锈剂ZS1—ZS6。采用正交试验法,对合成工艺条件进行了优化;用线性极化法和交流阻抗法,对ZS1—ZS6的阻锈性能进行测试,筛选出最优阻锈剂;按国家标准方法测试阻锈剂对混凝土性能的影响,又参照ASTM G31-72(2004)方法,在不同NaCl浓度下测试了钢筋的失重率和缓蚀率。结果表明:ZS1—ZS6最优制备工艺条件为反应温度为130℃、对苯二异氰酸酯与二乙烯三胺的物质的量比为1∶1.3、反应时间为24 h;在最优工艺条件下,ZS1—ZS6的收率达95.7%~97.2%;ZS1—ZS6均具有良好的阻锈性能,ZS5为最优;掺ZS5的基准混凝土试件,Cl^(-)扩散系数和碳化深度大幅降低,掺ZS5前后,混凝土的抗压强度、抗折强度和坍落度变化不大,与混凝土的相容性较好,对施工有利;碳钢在含ZS5的3.5%(质量分数,下同)NaCl腐蚀介质中浸泡90 d,容抗曲线半径仍有增长趋势,钢筋失重率低,缓蚀率高,阻锈持久性好。ZS5能有效阻止混凝土钢筋的锈蚀,显著提高混凝土的耐久性,可广泛应用于腐蚀环境中的建筑物。In order to solve the corrosion problem of concrete reinforcement under harsh environment,six new corrosion inhibitors ZS1—ZS6 were synthesized by condensation of 1,4-phenylene diisocyanate or 1,4-phenylene diisothiocyanate and compound(I).The orthogonal experimental method was used to optimize the synthesis process conditions;The corrosion resistance performance of ZS1-ZS6 was tested by linear polarization and AC impedance method,and the optimal corrosion inhibitor was selected;The influence of corrosion inhibitor on the performance of concrete was tested according to the national standard method,and weight loss rate and corrosion inhibition rate of steel bars were tested under different NaCl concentrations according to ASTM G31-72(2004)method.The results show that the optimum preparation conditions of ZS1-ZS6 are as follows:the reaction temperature of 130℃,the molar ratio of 1∶1.3 between 1,4-phenylene diisocyanate and diethylene triamine,and the reaction time of 24 hours;Under the optimum conditions,the yield of ZS1-ZS6 reaches 95.7%~97.2%;ZS1-ZS6 all have good anti-rust performance,with ZS5 being the best.The Cl^(-)diffusion coefficient and carbonization depth of the benchmark concrete specimens doped with ZS5 are greatly reduced,and the compressive strength,flexion strength and slump of concrete have little change before and after mixing with ZS5,indicating good compatibility with the concrete,which is beneficial for construction.After soaking carbon steel in a 3.5%NaCl corrosion medium containing ZS5 for 90 days,the radius of the bulk resistance curve still has an increasing trend,the weight loss rate of steel bars is low,the corrosion inhibition rate is high,and the rust resistance durability is good.ZS5 can effectively prevent the corrosion of concrete reinforcement,significantly improve the durability of concrete,and can be widely used in the construction of buildings in corrosive environment.

关 键 词：材料失效与保护 阻锈剂 混凝土钢筋 对苯二异氰酸酯 对苯二异硫氰酸酯 

分 类 号：TU528[建筑科学—建筑技术科学]