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Effect of Cathodic Protection on Reinforced Concrete with Fly Ash Using Electrochemical Noise
Jorge Pedro García Contreras
CITLALLI GAONA TIBURCIO
MARIA IRENE LOPEZ CAZARES
GUILLERMO SANCHEZ DIAZ
Juan Carlos Ibarra Castillo
Jesús Jáquez
Demetrio Nieves Mendoza
Erick Edgar Maldonado Bandala
FRANCISCO JAVIER OLGUIN COCA
Luis Daimir López León
Facundo Almeraya Calderón
Acceso Abierto
Atribución-NoComercial-SinDerivadas
https://doi.org/10.3390/ma14092438
Electrochemical noise
Fly ash
Concrete
Cathodic protection
Microstructure
"Corrosion of steel reinforcement is the major factor that limits the durability and serviceability performance of reinforced concrete structures. Impressed current cathodic protection (ICCP) is a widely used method to protect steel reinforcements against corrosion. This research aimed to study the effect of cathodic protection on reinforced concrete with fly ash using electrochemical noise (EN). Two types of reinforced concrete mixtures were manufactured; 100% Ordinary Portland Cement (OCP) and replacing 15% of cement using fly ash (OCPFA). The specimens were under-designed protected conditions (−1000 ≤ E ≤ −850 mV vs. Ag/AgCl) and cathodic overprotection (E < −1000 mV vs. Ag/AgCl) by impressed current, and specimens concrete were immersed in a 3.5 wt.% sodium chloride (NaCl) Solution. The analysis of electrochemical noise-time series showed that the mixtures microstructure influenced the corrosion process. Transients of uniform corrosion were observed in the specimens elaborated with (OPC), unlike those elaborated with (OPCFA). This phenomenon marked the difference in the concrete matrix’s hydration products, preventing Cl− ions flow and showing passive current and potential transients in most specimens."
MDPI
2021
Artículo
García-Contreras, J.; Gaona-Tiburcio, C.; López-Cazares, I.; Sanchéz-Díaz, G.; Ibarra Castillo, J.C.; Jáquez-Muñoz, J.; Nieves-Mendoza, D.; Maldonado-Bandala, E.; Olguín-Coca, J.; López-León, L.D.; Almeraya-Calderón, F. Effect of Cathodic Protection on Reinforced Concrete with Fly Ash Using Electrochemical Noise. Materials 2021, 14, 2438. https://doi.org/10.3390/ma14092438
METALURGIA
Versión publicada
publishedVersion - Versión publicada
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