Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Corrosion rate measurement by using polarization resistance method for microcell and macrocell corrosion: Theoretical analysis and experimental work with simulated concrete pore solution
Highlights Polarization resistance method (PRM) is applied to microcell and macrocell corrosion (MMC). Stern-Geary equation is modified to account for the effects of macrocell current. Dispersion of the imposed polarization current affects the corrosion rate measured by PRM for MMC. Macrocell current is correlated with the measured corrosion rate of passive rebars during MMC.
Abstract The applicability of the polarization resistance method to microcell and macrocell corrosion (MMC) has been often ignored. To address this research gap, this study investigates corrosion rate measurement by using the polarization resistance method on MMC of reinforced concrete. A modified Stern-Geary equation for MMC is proposed to consider the effects of the macrocell current. The Tafel kinetic parameters and polarization resistance are obtained by conducting potentiodynamic polarization tests in a simulated concrete pore solution. The proposed equation is validated for both active and passive steel rebars. A significant overestimation is found for passive steel rebars while a substantial measurement error is found for active steel rebars due to the macrocell current.
Corrosion rate measurement by using polarization resistance method for microcell and macrocell corrosion: Theoretical analysis and experimental work with simulated concrete pore solution
Highlights Polarization resistance method (PRM) is applied to microcell and macrocell corrosion (MMC). Stern-Geary equation is modified to account for the effects of macrocell current. Dispersion of the imposed polarization current affects the corrosion rate measured by PRM for MMC. Macrocell current is correlated with the measured corrosion rate of passive rebars during MMC.
Abstract The applicability of the polarization resistance method to microcell and macrocell corrosion (MMC) has been often ignored. To address this research gap, this study investigates corrosion rate measurement by using the polarization resistance method on MMC of reinforced concrete. A modified Stern-Geary equation for MMC is proposed to consider the effects of the macrocell current. The Tafel kinetic parameters and polarization resistance are obtained by conducting potentiodynamic polarization tests in a simulated concrete pore solution. The proposed equation is validated for both active and passive steel rebars. A significant overestimation is found for passive steel rebars while a substantial measurement error is found for active steel rebars due to the macrocell current.
Corrosion rate measurement by using polarization resistance method for microcell and macrocell corrosion: Theoretical analysis and experimental work with simulated concrete pore solution
Chen, Lijie (Autor:in) / Su, Ray Kai Leung (Autor:in)
15.09.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Macrocell Corrosion Currents in Simulated Concrete Pore Solution and Reinforced Concrete
| Springer Verlag | 2023
Macrocell Corrosion Currents in Simulated Concrete Pore Solution and Reinforced Concrete
| DOAJ | 2023