文献类型：期刊文献

英文题名：Indoor accelerated corrosion test and marine field test of corrosion-resistant low-alloy steel rebars

作者：Liu, Ming[1]; Cheng, Xuequn[1]; Li, Xiaogang[1,2]; Hu, Jiezhen[3]; Pan, Yue[1]; Jin, Zhu[1]

机构：[1] Corrosion and Protection Center, University of Science and Technology Beijing, Beijing, 100083, China; [2] Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China; [3] Engineering College, Guangdong Ocean University, Zhanjiang, 524088, China

年份：2016

卷号：5

起止页码：87

外文期刊名：Case Studies in Construction Materials

收录：EI(收录号：20182305281169)、Scopus(收录号：2-s2.0-84990984052)

语种：英文

外文关键词：Corrosion resistance - Magnetite - Hematite - Concretes - Localized corrosion - Seawater corrosion - Testing - Alloy steel - Epoxy resins - Steel corrosion - Corrosive effects

外文摘要：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