Spatial distribution of crystalline corrosion products formed during corrosion of stainless steel in concrete (CROSBI ID 216451)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Serdar, Marijana ; Meral, Cagla ; Kunz, Martin ; Bjegović, Dubravka ; Wenk, Hans-Rudolf ; Monteiro, Paulo J.M.
engleski
Spatial distribution of crystalline corrosion products formed during corrosion of stainless steel in concrete
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 (μ-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). μ-XRD revealed that goethite (α-FeOOH) and akaganeite (β-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.
Backscattered Electron Imaging; X-ray micro-diffraction; Corrosion; Concrete; Stainless steel
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Podaci o izdanju
71
2015.
93-105
objavljeno
0008-8846
10.1016/j.cemconres.2015.02.004
Povezanost rada
Građevinarstvo, Temeljne tehničke znanosti