磁场作用下钢筋混凝土结构中钢筋锈蚀研究  

Study of Reinforcement Corrosion in Reinforced Concrete Structures under the Action of Magnetic Fields

作　　者：李伟凡 杨建宇 蒋鹏霄 LI Wei-fan;YANG Jian-yu;JIANG Peng-xiao(Changsha University Of Science&Technology,Changsha 410000,China;China Construction Fifth Engineering Bureau Co.,Ltd.Changsha 410000,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410000 [2]中国建筑第五工程局有限公司,湖南长沙410000

出　　处：《全面腐蚀控制》2023年第9期87-91,95,共6页Total Corrosion Control

基　　金：国家自然科学基金资助项目(52209155)。

摘　　要：随着科学技术的不断发展,生活中出现的磁场环境不断增加,而这种新型环境对于钢筋混凝土结构的钢筋的耐腐蚀性能会产生新的挑战。为了探究磁场环境对于钢筋混凝土结构中钢筋的耐蚀性能和锈蚀机理的影响,通过钢筋锈蚀实验观察钢筋锈蚀形貌,采用电化学工作站测量开路电位、极化曲线等技术研究了不同磁感应强度对模拟混凝土孔隙液中钢筋锈蚀行为的影响。研究结果表明:磁场使开路电位正移、腐蚀电位正移、腐蚀电流密度减小;磁场使钢筋锈蚀产物大量吸附于钢筋表面,使得钢筋锈蚀面积减小;磁场强度越大,对电化学腐蚀行为的影响越大。With the continuous development of science and technology,the magnetic field environments appearing in life are increasing,and this new environment will produce new challenges for the corrosion resistance of reinforcing steel in reinforced concrete structures.In order to investigate the effect of magnetic field environment on the corrosion resistance and corrosion mechanism of reinforcing steel in reinforced concrete structures,the effect of different magnetic induction strength on the corrosion behavior of reinforcing steel in simulated concrete pore fluid was investigated by observing the corrosion morphology of reinforcing steel through reinforcing steel corrosion experiments and using techniques such as open circuit potential and polarization curves measured by electrochemical workstation.The results show that:the magnetic field shifts the open circuit potential positively,the corrosion potential positively,and the corrosion current density decreases;the magnetic field makes the rebar corrosion products adsorb on the rebar surface in large quantities,which makes the rebar corrosion area decrease;the larger the magnetic field strength is,the greater the effect on the electrochemical corrosion behavior.

关 键 词：磁场 钢筋锈蚀 磁场梯度力 电化学试验 

分 类 号：TU503[建筑科学—建筑技术科学]