Crevice corrosion of reinforcing steel in carbonated simulated concrete pore solutions contaminated by chloride  

作　　者：Peng-peng Wu Yuan-pei Gong Shao-hua Zhang Yue-zhong Zhang Bao-sheng Liu Guang-ling Song 

机构地区：[1]College of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan,030024,Shanxi,China [2]College of Chemical Engineering and Technology,Taiyuan University of Science and Technology,Taiyuan,030024,Shanxi,China [3]Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,Guangdong,China [4]School of Mechanical and Mining Engineering,Centre for Advanced Materials Processing and Manufacturing(AMPAM),The University of Queensland,St Lucia,QLD,4072,Australia [5]State Key Laboratory of Physical Chemistry of Solid Surfaces,Xiamen University,Xiamen,361005,Fujian,China

出　　处：《Journal of Iron and Steel Research International》2025年第1期293-311,共19页钢铁研究学报(英文版)

基　　金：supported by the Fundamental Research Program of Shanxi Province(Grant Nos.202203021222188 and 202303021211166);Scientific Research Fund of Taiyuan University of Science and Technology(Grant No.20222073);Award Fund for Outstanding Doctors in Shanxi Province(Grant No.20232047);Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(Grant No.2022L280).

摘　　要：The crevice corrosion of the reinforcing steel in the carbonated simulated concrete pore solutions(SCPSs)containing 0.04 mol/L chloride was investigated.In comparison,the steel without crevice covered on its surface was also studied.Results showed that the crevice corrosion in the uncarbonated SCPS was not triggered and the steel remained passivity by suppressing the anodic dissolution in the crevice interior.As SCPS was carbonated to have pH values of 10.5 and 11.5,the crevice corrosion was easier to be activated than the widely reported pitting corrosion owing to the rapid oxygen depletion within the crevice,but the crevice corrosion damage might be alleviated to a certain extent due to the relative compact surface film formed inside the crevice.The further carbonation led to the activation dissolution of both the crevice interior and exterior,causing the more serious corrosion damage.Corrosion process of the crevice corrosion was systematically analyzed by combining the electrochemical measurement results and Evens polarization diagram.

关 键 词：Crevice corrosion Reinforcing steel CARBONATION Electrochemical test RUST Evens polarization diagram 

分 类 号：TU528[建筑科学—建筑技术科学]