Effect of Cathodic Protection on Reinforced Concrete with Fly Ash Using Electrochemical Noise

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 e...

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Bibliographic Details
Published in:Materials 2021-05, Vol.14 (9), p.2438
Main Authors: García-Contreras, Jorge, Gaona-Tiburcio, Citlalli, López-Cazares, Irene, Sanchéz-Díaz, Guillermo, Ibarra Castillo, Juan Carlos, Jáquez-Muñoz, Jesús, Nieves-Mendoza, Demetrio, Maldonado-Bandala, Erick, Olguín-Coca, Javier, López-León, Luis Daimir, Almeraya-Calderón, Facundo
Format: Article
Language:English
Subjects:
Asymmetry
Carbon dioxide
Cathodic protection
Cement
Cement reinforcements
Coal-fired power plants
Concrete
Concrete structures
Corrosion
Corrosion effects
Corrosion prevention
Electrochemical noise
Electrodes
Electrolytes
Fly ash
Fourier transforms
Industrial plant emissions
Noise
Portland cements
Reinforced concrete
Reinforcing steels
Scanning electron microscopy
Silver chloride
Sodium chloride
Uniform attack (corrosion)
Wavelet transforms
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Summary: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.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14092438