Effect of Cathode–Anode distance and electrical resistivity on macrocell corrosion currents and cathodic response in cases of chloride induced corrosion in reinforced concrete structures

2020 ◽  
Vol 245 ◽  
pp. 118337 ◽  
Author(s):  
Chantal Chalhoub ◽  
Raoul François ◽  
Myriam Carcasses
Keyword(s):  
Electrical Resistivity ◽  
Reinforced Concrete ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Chloride Induced Corrosion ◽  
Macrocell Corrosion

Effect of Anodic and Cathodic Chloride Contents on the Macrocell Corrosion and Polarization Behavior of Reinforcing Steel

2016 ◽  
Vol 22 ◽  
pp. 45-58 ◽  
Author(s):  
Zhong Lu Cao ◽  
Hao Yu Chen ◽  
Lian Yu Wei ◽  
Makoto Hibino
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Chloride Content ◽  
Reinforced Concrete Structures ◽  
Reinforcing Steel ◽  
Anodic Reaction ◽  
Polarization Behavior ◽  
Mixed Control ◽  
Cement Mortars ◽  
Macrocell Corrosion

The effect of anodic and cathodic chloride contents on the macrocell corrosion and polarization behavior of reinforcing steel embedded in cement mortars were investigated and clarified. The results indicated that the higher cathodic chloride content could accelerate the cathodic reaction of cathode and make the controlling mode of macrocell corrosion changed from cathodic control to mixed control or anodic control. The higher anodic chloride content could accelerate the anodic reaction of anode and make the macrocell corrosion more controlled by cathode. These results will provide a guide to inhibiting the macrocell corrosion of reinforcing steel in concrete, which are not only useful for engineers to design and construct the new marine reinforced concrete structures, but also are helpful for engineers to repair or rehabilitate the existing chloride contaminated reinforced concrete structures, in the condition of avoiding the adverse effect of macrocell corrosion induced by the non-uniform distribution of anodic and cathodic chloride.

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