6533b85dfe1ef96bd12bf069
RESEARCH PRODUCT
Anodic growth of passive layers on steel rebars in an alkaline medium simulating the concrete pores
Francisco VicenteJosé Juan García-jareñoM. SánchezM. SánchezMaria Cruz AlonsoJ. Gregorisubject
Materials scienceCarbon steelPassivationGeneral Chemical EngineeringMineralogyElectrolyteengineering.materialCorrosionDielectric spectroscopyElectrochemistryengineeringEquivalent circuitNyquist plotComposite materialCyclic voltammetrydescription
Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques have been used to study passive layers anodically grown on steel rebars in an aqueous alkaline solution simulating the electrolyte of the concrete pores. Nyquist diagrams recorded by EIS at the different stabilization potentials show a diffusional tail at low frequencies. The analysis of the impedance measurements has been made by means of an equivalent circuit with a Warburg component and within the framework of the point defect model (PDM) theory. It is observed that the calculated concentration of vacancies is a function of the potential in accordance with the theoretical prediction of the PDM.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-10-01 | Electrochimica Acta |