Spatial distribution of crystalline corrosion products formed during corrosion of stainless steel in concrete

被引：32
作者：
Serdar, Marijana [1 ]
Meral, Cagla [2 ]
Kunz, Martin [3 ]
Bjegovic, Dubravka [1 ]
Wenk, Hans-Rudolf [4 ]
Monteiro, Paulo J. M. [5 ]
机构：
[1] Univ Zagreb, Fac Civil Engn, Dept Mat, Zagreb 10000, Croatia
[2] Middle E Tech Univ, Dept Civil Engn, TR-06531 Ankara, Turkey
[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[4] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA
[5] Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA
来源：
CEMENT AND CONCRETE RESEARCH | 2015年 / 71卷
基金：
美国国家科学基金会;
关键词：
Backscattered Electron Imaging; X-ray micro-diffraction; Corrosion; Concrete; Stainless steel; MULTIPHASE INTERFACE STRUCTURES; X-RAY MICRODIFFRACTION; ELECTROCHEMICAL PHENOMENA; ELECTRICAL-PROPERTIES; BEHAVIOR; ALKALINE; LAYER; MICROSTRUCTURE; CRACKING; REINFORCEMENT;
D O I：
10.1016/j.cemconres.2015.02.004
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The mineralogy and spatial distribution of nano-crystalline corrosion products that form in the steel/concrete interface were characterized using synchrotron X-ray micro-diffraction (mu-XRD). Two types of low-nickel high-chromium reinforcing steels embedded into mortar and exposed to NaCl solution were investigated. Corrosion in the samples was confirmed by electrochemical impedance spectroscopy (EIS). mu-XRD revealed that goethite (alpha-FeOOH) and akaganeite (beta-FeOOH) are the main iron oxide-hydroxides formed during the chloride-induced corrosion of stainless steel in concrete. Goethite is formed closer to the surface of the steel due to the presence of chromium in the steel, while akaganeite is formed further away from the surface due to the presence of chloride ions. Detailed microstructural analysis is shown and discussed on one sample of each type of steel. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：93 / 105
页数：13
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