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

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URI: https://hdl.handle.net/11556/3822
ISSN: 0010-938X
DOI: 10.1016/j.corsci.2008.03.013
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2008-07
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Abstract
The 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.
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A. High strength steel , B. AFM , C. Corrosion , General Chemistry , General Chemical Engineering , General Materials Science
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journal article
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Sánchez , J , Fullea , J , Andrade , C , Gaitero , J J & Porro , A 2008 , ' AFM study of the early corrosion of a high strength steel in a diluted sodium chloride solution ' , Corrosion Science , vol. 50 , no. 7 , pp. 1820-1824 . https://doi.org/10.1016/j.corsci.2008.03.013