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Título

AFM study of the early corrosion of a high strength steel in a diluted sodium chloride solution

AutorSánchez, Javier; Fullea, J. ; Andrade, C.; Gaitero, Juan J.; Porro Gutiérrez, Antonio
Palabras claveHigh strength steel
AFM
Corrosion
Fecha de publicaciónjul-2008
EditorElsevier
CitaciónCorrosion Science 50(7): 1820-1824 (2008)
ResumenThe high strength steels employed as reinforcement in pre-stressed concrete structures are drawn wire steels of eutectoid composition with a pearlitic microstructure. This work is focused on the study, by atomic force microscopy, of the early stages of the corrosion of such steels as a consequence of their exposition to a sodium chloride solution. The obtained images show the pearlitic microstructure of the steel, with a preferential attack of the ferrite phase and the cementite acting as a cathode. The corrosion rate was determined by calculating the amount of material lost from a roughness analysis. The obtained results are in good agreement with the predictions of Galvelel’s theory, according to which the corrosion rate slows down as the pit depth increases.
Versión del editorhttp://dx.doi.org/10.1016/j.corsci.2008.03.013
URIhttp://hdl.handle.net/10261/19888
DOI10.1016/j.corsci.2008.03.013
ISSN0010-938X
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