Electrochemical behavior of corrosion-resistant rebar in simulated concrete pore solutions

被引：0
|
作者：
Liu X. [1 ]
Wu M. [1 ]
Shi J. [1 ,2 ]
机构：
[1] School of Materials Science and Engineering, Southeast University, Nanjing
[2] Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2019年 / 49卷 / 03期
关键词：
Corrosion products; Corrosion-resistant rebar; Electrochemical impedance spectroscopy; Simultaneous carbonation and chloride attacking;
D O I：
10.3969/j.issn.1001-0505.2019.03.014
中图分类号：
学科分类号：
摘要：
Electrochemical impedance spectroscopy (EIS) was used to compare the electrochemical behaviors of the corrosion-resistant rebar (00Cr10MoV) and the ordinary low-carbon rebar (20MnSiV) in simulated concrete pore solutions on spontaneous passivation, carbonation, and simultaneous carbonation and chloride attack. Moreover, scanning electron microscopy (SEM) was used to observe the morphology of corrosion products on the surface of rebars. The results show that the passivation capacity of 00Cr10MoV rebar is much better than that of 20MnSiV rebar, and the corrosion resistance of 00Cr10MoV rebar subjected to carbonation and simultaneous carbonation and chlorides attack is also higher compared with that of 20MnSiV rebar. In the electrochemical parameter fitting, the passivation film resistance and charge transfer resistance of 00Cr10MoV rebar in the carbonation period are about 3 times and 58 times that of 20MnSiV rebar, respectively; Compared with the 20MnSiV rebar, the passivation film resistance and charge transfer resistance of 00Cr10MoV rebar in the simultaneous carbonation and chloride attacking period increase by 89% and 99%, respectively. After simultaneous carbonation and chlorides attacking, only a small amount of corrosion pits are found on the surface of 00Cr10MoV rebar, however, a large amount of loose corrosion products are observed on the surface of 20MnSiV rebar. © 2019, Editorial Department of Journal of Southeast University. All right reserved.
引用
收藏
页码：502 / 506
页数：4
相关论文
共 11 条
  • [1] Shi X.M., Xie N., Fortune K., Et al., Durability of steel reinforced concrete in chloride environments: An overview, Construction and Building Materials, 30, pp. 125-138, (2012)
  • [2] Serdar M., Zulj L.V., Bjegovie D., Long-term corrosion behaviour of stainless reinforcing steel in mortar exposed to chloride environment, Corrosion Science, 69, pp. 149-157, (2013)
  • [3] Hurley M.F., Scully J.R., Threshold chloride concentrations of selected corrosion-resistant rebar materials compared to carbon steel, Corrosion, 62, 10, pp. 892-904, (2006)
  • [4] Presuel-Moreno F., Scully J.R., Sharp S.R., Literature review of commercially available alloys that have potential as low-cost, corrosion-resistant concrete reinforcement, Corrosion, 66, 8, pp. 0860011-08600113, (2010)
  • [5] Chen Y., Yang Z.M., Wang H.M., Comprehensive properties of 400 MPa grade corrosion-resistant rebar, Journal of Iron and Steel Research International, 19, 12, pp. 48-52, (2012)
  • [6] Liu X., Wang C.H., Lin Y.M., Et al., Pitting corrosion resistance to chloride of 00Cr10MoV rebar in cement extract solution, Corrosion and Protection, 39, 8, pp. 623-628, (2018)
  • [7] Jin Z., Cheng X.Q., Liu M., Et al., Influence of Cr on corrosion performance of corrosion-resistant rebar 5Cr steel in simulated concrete pore solutions, Corrosion Science and Protection Technology, 28, 4, pp. 291-297, (2016)
  • [8] Hakiki N.E., Montemor M.F., Ferreira M.G.S., Et al., Semiconducting properties of thermally grown oxide films on AISI 304 stainless steel, Corrosion Science, 42, 4, pp. 687-702, (2000)
  • [9] Luo H., Dong C.F., Xiao K., Et al., Characterization of passive film on 2205 duplex stainless steel in sodium thiosulphate solution, Applied Surface Science, 258, 1, pp. 631-639, (2011)
  • [10] Freire L., Carmezim M.J., Ferreira M.G.S., Et al., The passive behaviour of AISI 316 in alkaline media and the effect of pH: A combined electrochemical and analytical study, Electrochimica Acta, 55, 21, pp. 6174-6181, (2010)
12