Published May 2015 | Version v1
Journal article Metadata-only

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

Creators

  • 1. Department of Materials, Faculty of Civil Engineering, University of Zagreb, 10000 Zagreb (Croatia)
  • 2. Middle East Technical University, Department of Civil Engineering, Ankara (Turkey)
  • 3. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States)
  • 4. Department of Earth and Planetary Science, University of California, Berkeley, CA 94720 (United States)
  • 5. Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720 (United States)

Description

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. - Highlights: • Synchrotron micro-diffraction used to map the distribution of crystalline phases. • Goethite and akaganeite are the main corrosion products during chloride induced corrosion in mortar. • Layers of goethite and akaganeite are negatively correlated. • EDS showed Cr present in corrosion products identified by SEM

Availability note (English)

Available from http://dx.doi.org/10.1016/j.cemconres.2015.02.004

Additional details

Identifiers

DOI
10.1016/j.cemconres.2015.02.004;
PII
S0008-8846(15)00046-0;

Publishing Information

Journal Title
Cement and Concrete Research
Journal Volume
71
Journal Page Range
p. 93-105
ISSN
0008-8846
CODEN
CCNRAI

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
47045319
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CHROMIUM; CONCRETES; CORROSION; CORROSION PRODUCTS; ELECTROCHEMISTRY; GOETHITE; IMPEDANCE; INTERFACES; IRON OXIDES; MICROSTRUCTURE; MORTARS; NANOSTRUCTURES; NICKEL; SCANNING ELECTRON MICROSCOPY; SODIUM CHLORIDES; SPATIAL DISTRIBUTION; SPECTROSCOPY; STAINLESS STEELS; SURFACES; X-RAY DIFFRACTION
Descriptors DEC
ALKALI METAL COMPOUNDS; ALLOYS; BUILDING MATERIALS; CARBON ADDITIONS; CHALCOGENIDES; CHEMICAL REACTIONS; CHEMISTRY; CHLORIDES; CHLORINE COMPOUNDS; COHERENT SCATTERING; DIFFRACTION; DISTRIBUTION; ELECTRON MICROSCOPY; ELEMENTS; HALIDES; HALOGEN COMPOUNDS; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; IRON COMPOUNDS; MATERIALS; METALS; MICROSCOPY; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; SCATTERING; SODIUM COMPOUNDS; SODIUM HALIDES; STEELS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS

Optional Information

Copyright
Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.