Affiliation:
1. School of Materials, Sun Yat-sen University, Shenzhen 518107, China
2. Research Center for Structural Materials, National Institute for Materials Science, Tsukuba 305-0047, Japan
Abstract
Hyperbaric oxygen-accelerated corrosion testing (HOACT) is a newly developed method to study in the labor the corrosion behavior of steel bars in concrete. This work aimed to intensively investigate the mechanical properties and microstructures of HOACT-generated corrosion products by means of nano-indentation tests, Raman micro-spectrometry, and scanning electron microscopy. The local elastic modulus and nanohardness varied over wide ranges of 6.8–75.2 GPa and 0.38–4.44 GPa, respectively. Goethite, lepidocrocite, maghemite, magnetite, and akageneite phases were identified in the corrosion products. Most regions of the rust layer were composed of a complex and heterogeneous mix of different phases, while some regions were composed of maghemite or akageneite only. The relationship between the micromechanical properties and typical microstructural features is finally discussed at the micro-scale level. It was found that the porosity of corrosion products can significantly influence their micromechanical properties.
Funder
Council for Science, Technology and Innovation
Sun Yat-Sen University
Subject
General Materials Science
Reference38 articles.
1. Bertolini, L., Elsener, B., Pedeferri, P., Redaelli, E., and Polder, R.B. (2013). Corrosion of Steel in Concrete: Prevention, Diagnosis, Repair, John Wiley & Sons. [2nd ed.].
2. Reinforcement corrosion in concrete structures, its monitoring and service life prediction—A review;Ahmad;Cem. Concr. Compos.,2003
3. On the penetration of corrosion products from reinforcing steel into concrete due to chloride-induced corrosion;Wong;Corros. Sci.,2010
4. Marcotte, T.D. (2001). Characterization of Chloride-Induced Corrosion Products that Form in Steel-Reinforced Cementitious Materials. [Ph.D. Thesis, University of Waterloo].
5. Chloride-induced corrosion products of steel in cracked-concrete subjected to different loading conditions;Jaffer;Cem. Concr. Res.,2009
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献