scholarly journals EVALUATION OF REINFORCING STEEL OF CHLORIDE INDUCED CORROSION USING HALF-CELL POTENTIAL AND CONCRETE RESISTIVITY MEASUREMENTS

2021 ◽  
Vol 5 (11) ◽  
Author(s):  
GWARAH LEDUM S ◽  
MACMAMMAH MICHAEL ◽  
CHARLES KENNEDY
Keyword(s):  
Reinforcing Steel ◽  
Half Cell ◽  
Cell Potential ◽  
Resistivity Measurements ◽  
Chloride Induced Corrosion ◽  
Concrete Resistivity

Quantifying chloride-induced corrosion from half-cell potential

1993 ◽  
Vol 23 (6) ◽  
pp. 1443-1454 ◽  
Author(s):  
R.K. Dhir ◽  
M.R. Jones ◽  
M.J. McCarthy
Keyword(s):  
Half Cell ◽  
Cell Potential ◽  
Chloride Induced Corrosion

Effect of Nitrite Concentration and pH on Steel Corrosion Induced by Sulfate in Simulated Concrete Pore Environment

2013 ◽  
Vol 368-370 ◽  
pp. 911-918 ◽  
Author(s):  
Zhong Lu Cao ◽  
Makoto Hibino ◽  
Hiroki Goda
Keyword(s):  
Steel Corrosion ◽  
Threshold Level ◽  
Nitrite Concentration ◽  
Visual Examination ◽  
Half Cell ◽  
Cell Potential ◽  
Linear Polarization Resistance ◽  
Alkaline Environment ◽  
Chloride Induced Corrosion ◽  
Nitrite Content

The effect of nitrite on steel corrosion induced by sulfate in three simulated concrete pore environments has been investigated by means of half-cell potential, linear polarization resistance and visual examination, as well as sulfate-induced corrosion is compared with chloride-induced corrosion. The results indicate that with the presence of nitrite, sulfate-induced corrosion can be inhibited effectively. Sulfate threshold level increases with the increasing of nitrite concentration and highly alkaline environment plays an important role in assisting nitrite to inhibit sulfate-induced corrosion. Chloride-induced corrosion is more prone to initiate than sulfate-induced corrosion in highly alkaline environment but in neutral environment, when nitrite content is equal to or less than 0.053mol/L, sulfate-induced corrosion is more likely to occur than chloride-induced corrosion.

Corrosion of reinforcing steel evaluated by means of concrete resistivity measurements

2002 ◽  
Vol 44 (1) ◽  
pp. 81-99 ◽  
Author(s):  
W Morris ◽  
A Vico ◽  
M Vazquez ◽  
S.R de Sanchez
Keyword(s):  
Reinforcing Steel ◽  
Resistivity Measurements ◽  
Concrete Resistivity

Corrosion Behaviors of Reinforcing Steel in Concrete with Various Moisture Contents

2019 ◽  
Vol 805 ◽  
pp. 100-105 ◽  
Author(s):  
Zhong Lu Cao
Keyword(s):  
Reinforcing Steel ◽  
Half Cell ◽  
Cell Potential ◽  
Moisture Contents ◽  
Macro Cell ◽  
Saturated State ◽  
Cell Current ◽  
Corrosion Behaviors ◽  
Water Saturated ◽  
Kinetics Of

Moisture contents of concrete can affect the corrosion of reinforcing steel. In this paper, moisture contents of concrete were increased by filling the small holes with water or fully submerging in water. The effect of moisture contents on the corrosion behaviors of cathodic and anodic steel was investigated by comparing the half-cell potential, micro-cell and macro-cell current density. The results indicated that when only the concrete around cathodic steel was in water-saturated state, it could greatly weakened the kinetics of cathodic reaction and resulted in a considerable decrease in macro-cell current. When only the concrete around anodic steel was in water-saturated state, it could not effectively inhibit the macro-cell corrosion. When both the concrete around the cathodic steel and the anodic steel were in water-saturated state, the macro-cell current flowing between cathode and anode could be inhibited effectively, and the corrosion was little affected by chloride contents.

scholarly journals Methodology for Assessing the Probability of Corrosion in Concrete Structures on the Basis of Half-Cell Potential and Concrete Resistivity Measurements

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Lukasz Sadowski
Keyword(s):  
Reinforced Concrete ◽  
Concrete Slab ◽  
Electrochemical Techniques ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Half Cell ◽  
Reinforced Concrete Slab ◽  
Cell Potential ◽  
Potential Measurement ◽  
Concrete Resistivity

In recent years, the corrosion of steel reinforcement has become a major problem in the construction industry. Therefore, much attention has been given to developing methods of predicting the service life of reinforced concrete structures. The progress of corrosion cannot be visually assessed until a crack or a delamination appears. The corrosion process can be tracked using several electrochemical techniques. Most commonly the half-cell potential measurement technique is used for this purpose. However, it is generally accepted that it should be supplemented with other techniques. Hence, a methodology for assessing the probability of corrosion in concrete slabs by means of a combination of two methods, that is, the half-cell potential method and the concrete resistivity method, is proposed. An assessment of the probability of corrosion in reinforced concrete structures carried out using the proposed methodology is presented. 200 mm thick 750 mm  ×  750 mm reinforced concrete slab specimens were investigated. PotentialEcorrand concrete resistivityρin each point of the applied grid were measured. The experimental results indicate that the proposed methodology can be successfully used to assess the probability of corrosion in concrete structures.

Passive corrosion control and active corrosion prevention of the reinforced concrete structures by electrochemical chloride removal and inhibitors

2013 ◽  
Vol 61 (1) ◽  
pp. 32-37 ◽  
Author(s):  
Guofu Qiao ◽  
Yi Hong ◽  
Tiejun Liu ◽  
Jinping Ou
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Concrete Cover ◽  
Reinforced Concrete Structures ◽  
Reinforcing Steel ◽  
Corrosion Control ◽  
Cell Potential ◽  
Content Type ◽  
Chloride Removal ◽  
Active Corrosion

Purpose – The aim of this paper was to investigate the passive corrosion control and active corrosion protective effect of the reinforced concrete structures by electrochemical chloride removal (ECR) method and inhibitors approach, respectively. Design/methodology/approach – The concentration of aggressive chloride ion distributed from the reinforcing steel to the surface of the concrete cover was analyzed during the ECR processes. Besides, the half-cell potential, the concrete resistance R c , the polarization resistance R p and the capacitance of double layer C dl of the steel/concrete system were used to characterize the electrochemical performance of the concrete prisms. Findings – The effectiveness of ECR could be enhanced by increasing the amplitude of potential or prolonging the time. Inhibitor SBT-ZX(I) could successfully prevent the corrosion development of the reinforcing steel in concrete. Originality/value – The research provides the scientific basis for the practical application of ECR and inhibitors in the field.

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