Electrochemical and analytical characterization of three corrosion inhibitors of steel in simulated concrete pore solutions |
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| Authors: | Jin-fie Shi Wei Sun |
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| Affiliation: | School of Materials Science and Engineering, Southeast University, Nanjing 211189, China;Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China |
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| 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 (Ecorr),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. |
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| Keywords: | steel corrosion inhibitors electrochemical analysis concrete solutions |
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