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Analysis of long‐term corrosion behavior in mortars containing recycled ladle furnace slag using computerized tomography and SEM
Author(s) -
Rodríguez A.,
GutiérrezGonzález S.,
Prieto M. I.,
Cobo A.,
Calderón V.
Publication year - 2015
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201407697
Subject(s) - corrosion , materials science , metallurgy , hematite , mortar , slag (welding) , cement , passivation , ground granulated blast furnace slag , ladle , scanning electron microscope , goethite , composite material , chemistry , layer (electronics) , organic chemistry , adsorption
A series of mortars subjected to accelerated corrosion in a humid environment form the basis for this study. In particular, we studied the corrosion behavior of steel reinforcement bars that were embedded in cement mortars that contained white ladle furnace slag (LFS) in partial substitution for fines and cement. The effects were observed using computerized axial tomography and scanning electron microscopy. Zones with fissures resulting from corrosion and the degree of damage due to passivation were identified from the imaging analysis. Mortars with and without white LFS behaved in a similar manner in the presence of chlorides. X‐ray diffraction (XRD) analysis confirmed that the formation of different hematite and goethite‐type iron oxides was mainly responsible for the corrosion that was observed.