Indoor accelerated corrosion test and marine field test of corrosion-resistant low-alloy steel rebars

被引：14
作者：
Liu M. [1 ]
Cheng X. [1 ]
Li X. [1 ,2 ]
Hu J. [3 ]
Pan Y. [1 ]
Jin Z. [1 ]
机构：
[1] Corrosion and Protection Center, University of Science and Technology Beijing, Beijing
[2] Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, Zhejiang
[3] Engineering College, Guangdong Ocean University, 524088, Zhanjiang
来源：
Case Studies in Construction Materials | 2016年 / 5卷
关键词：
Chromium; Corrosion products; Corrosion rate; Macrocell corrosion test; Marine field test; Rebar;
D O I：
10.1016/j.cscm.2016.09.005
中图分类号：
学科分类号：
摘要：
Macrocell corrosion test and accelerated alternating wet–dry experiment combined with marine field test were employed to study the corrosion behavior of HRB400 carbon steel, 1.5Cr steel, and 5Cr steel in a simulated concrete pore solution and mortar. The macrocell current significantly decreases in samples added with Cr compared with that in HRB400 steel. The corrosion rate is decreased by Cr but increased by Cl−; as a consequence, the corrosion rates of 1.5Cr and 5Cr steel are lower than that of HRB400 steel. However, the corrosion products differ slightly in terms of the contents of α-FeOOH (goethite), γ-FeOOH (lepidocrocite), γ-Fe2O3, and Fe3O4 (maghemite or magnetite). The addition of Cr increases the content of the protective α-FeOOH and reduces the content of γ-FeOOH. Both ordinary and high-performance epoxy coatings remain intact after 1 year of marine field test. Among the bare steel rebars, HRB400 steel shows extensive localized corrosion on the surface, whereas 1.5Cr steel exhibits less severe corrosion. The scarcely visible corroded areas in 5Cr steel indicate that this rebar is in the passive state, consistent with results of the indoor accelerated test. Hence, the durability of concrete structures can be prolonged with the utilization of corrosion-resistant low-alloy rebars. © 2016 The Authors
引用
收藏
页码：87 / 99
页数：12
相关论文
共 31 条
[1]  
Choi Y.S., Yi S.T., Kim M.Y., Effect of corrosion method of the reinforcing bar on bond characteristics in reinforced concrete specimens, Constr. Build. Mater., 54, 3, pp. 180-189, (2014)
[2]  
Patil S., Karkare B., Goyal S., Acoustic emission vis-à-vis electrochemical techniques for corrosion monitoring of reinforced concrete element, Constr. Build. Mater., 68, pp. 326-332, (2014)
[3]  
Mahdi V., Mohammad S., Pouria G., Comparative studies of experimental and numerical techniques in measurement of corrosion rate and time-to-corrosion-initiation of rebar in concrete in marine environments, Cem. Concr. Compos., 48, pp. 98-107, (2014)
[4]  
Shi J.J., Sun W., Recent research on steel corrosion in concrete, J. Chin. Ceram. Soc., 38, 9, pp. 1753-1764, (2010)
[5]  
Criado M., Bastidas D.M., Fajardo S., Fernandez-Jimenez A., Bastidas J.M., Corrosion behaviour of a new low-nickel stainless steel embedded in activated fly ash mortars, Cem. Concr. Compos., 33, 6, pp. 644-652, (2011)
[6]  
Freire L., Carmezima M.J., Ferreira M.G.S., The electrochemical behaviour of stainless steel AISI 304 in alkaline solutions with different pH in the presence of chlorides, Electrochim. Acta, 56, pp. 5280-5289, (2011)
[7]  
De Rojas R.R., New Developments in Steel Protection from Corrosion, (2001)
[8]  
Gong L., Darwin D., Browning J.P., Evaluation of mechanical and corrosion properties of MMFX reinforcing steel for concrete, A Report on Research Sponsored, (2004)
[9]  
Singh J.K., Singh D.D.N., The nature of rusts and corrosion characteristics of low alloy and plain carbon steels in three kinds of concrete pore solution with salinity and different pH, Corros. Sci., 56, (2012)
[10]  
Guo Z., Wan W.G., Sun W., Study on high strength and resisting corrosion steel bar containing Re, Iron Steel, 45, 12, pp. 53-58, (2012)
1234