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Electrochemical and analytical characterization of three corrosion inhibitors of steel in simulated concrete pore solutions

  • Jin-jie Shi
  • Wei Sun
Article

Abstract

Corrosion inhibitors for steel, such as sodium phosphate (Na3PO4), sodium nitrite (NaNO2), and benzotriazole (BTA), in simulated concrete pore solutions (saturated Ca(OH)2) were investigated. Corrosion behaviors of steel in different solutions were studied by means of corrosion potential (E corr), linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (PDP). A field emission scanning electron microscope (FESEM) equipped with energy dispersive X-ray analysis (EDXA) was used for observing the microstructures and morphology of corrosion products of steel. The results indicate that, compared with the commonly used nitrite-based inhibitors, Na3PO4 is not a good inhibitor, while BTA may be a potentially effective inhibitor to prevent steel from corrosion in simulated concrete pore solutions.

Keywords

steel corrosion inhibitors electrochemical analysis concrete solutions 

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Copyright information

© University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringSoutheast UniversityNanjingChina
  2. 2.Jiangsu Key Laboratory of Construction MaterialsSoutheast UniversityNanjingChina

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