混凝土模拟孔溶液中羧酸胺阻锈剂对碳钢的阻锈行为研究

关键字：混凝土,模拟,孔溶液,孔,溶液,中,羧酸,胺阻,

（1.高性能土木工程材料国家重点实验室，江苏 南京  211100；2.江苏苏博特新材料股份有限公司，江苏 南京  211103；
3.东南大学 材料科学与工程学院，江苏 南京  211189）

摘要：采用电化学阻抗谱测试、动电位极化曲线测试、干湿循环挂片试验，研究了混凝土模拟孔溶液中不同浓度的羧酸胺阻锈剂对碳钢的电化学和阻锈行为。结果表明：羧酸胺阻锈剂可以有效抑制Cl-对碳钢的腐蚀破坏，起到阻锈作用；随阻锈剂浓度增大，相应的电化学阻抗弧增大，点蚀电位增高，腐蚀电流密度减小，干湿循环挂片锈蚀面积及深度减小，阻锈效率显著提高。

关键词：羧酸胺；有机阻锈剂；腐蚀；混凝土模拟孔溶液；Cl-

中图分类号：TU528.042+.6        文献标识码：A        文章编号：1001-702X（2019）08-0068-05

 

Corrosion inhibition behavior of an carboxylic acid amine inhibitor on carbon steel in simulated concrete pore solution

ZHOU Xiaocheng1，2，SHI Liang1，2，CAI Jingshun1，2，MA Qi1，2，LIU Jianzhong1，2，HONG Jinxiang1，2，LIU Jiaping1，3

（1.State Key Laboratory of High Performance Civil Engineering Materials，Nanjing 211100，China；

2.Jiangsu Sobute New Materials Co. Ltd.，Nanjing 211103，China；

3.College of Materials Science and Engineering，Southeast University，Nanjing 211189，China）

Abstract：The electrochemical and rust-resistant behaviors of different concentrations of carboxylic acid amine rust inhibitor on carbon steel in concrete simulated pore solution were studied by electrochemical impedance spectrums（EIS），Potentiodynamic polarization tests and wetting-drying tests. The results show that the carboxylic acid amine rust inhibitor can effectively inhibit the corrosion damage of Cl- to carbon steel and play a role in rust inhibition. With the increase of the concentration of rust inhibitor，the corresponding electrochemical impedance arc increase，the pitting potential increases，and corrosion current density is reduced，the rust area and depth of the dry and wet cycle hangs are reduced，and the rust prevention efficiency is significantly improved.

Key words：carboxylic acid amine，organic inhibitor，corrosion，simulated concrete pore solution，Cl-