Influence of Mineral Admixtures on Corrosion Rate of Reinforced Steel in Concrete

2014 ◽  
Vol 711 ◽  
pp. 430-433
Author(s):  
Hai Hong Li ◽  
Zhi Hong Fan ◽  
Peng Ping Li
Keyword(s):  
Corrosion Rate ◽  
Linear Polarization ◽  
Mineral Admixtures ◽  
Reinforcing Steel ◽  
Polarization Method ◽  
Reinforced Steel ◽  
The Relationship

A linear polarization method was applied to measure corrosion rate of reinforced steel in concrete. The relationship between corrosion rate and mineral admixtures was discussed. The results show that changes of mineral admixtures material will affect the corrosion rate of reinforcing steel in concrete, of which slag is the most obvious.

Influence of Mineral Admixtures on Corrosion Potential of Reinforced Concrete at Early Stage

2013 ◽  
Vol 470 ◽  
pp. 814-817
Author(s):  
Hai Hong Li ◽  
Zhi Hong Fan ◽  
Peng Ping Li
Keyword(s):  
Reinforced Concrete ◽  
Corrosion Potential ◽  
Early Stage ◽  
Mineral Admixtures ◽  
Splash Zone ◽  
Reinforcing Steel ◽  
Reinforcement Corrosion ◽  
Experiment System ◽  
The Relationship

An artificial climate experiment system was designed and established to study reinforcement corrosion of concrete in splash zone at early stage. The relationship between corrosion potential and mineral admixtures was discussed. The results show that changes of mineral admixtures material will affect the corrosion potential of reinforcing steel in concrete, of which slag is the most obvious.

Error Estimation of Linear Polarization Resistance Measurement Caused by IR Drop for Reinforcement Corrosion in Concrete

2016 ◽  
Vol 866 ◽  
pp. 14-19
Author(s):  
Jin Xia Xu ◽  
Ya Long Cao ◽  
Lin Hua Jiang ◽  
Ying Bin Song ◽  
Wei Feng
Keyword(s):  
Linear Polarization ◽  
Polarization Resistance ◽  
Chloride Content ◽  
Chloride Ions ◽  
Resistance Measurement ◽  
Reinforcing Steel ◽  
Error Level ◽  
Corrosion Condition ◽  
Linear Polarization Resistance ◽  
Ir Drop

In order to evaluate more accurately the corrosion condition of reinforcing steel in chloride contaminated concrete, it is significant to investigate the error level in the linear polarization resistance measurement caused by IR drop. Concretes with eight levels of chloride ions (ranging from 0% to 2.0% by mass of cement) by adding different amounts of sodium chloride in the mixing water were prepared. Linear polarization measurements with and without IR compensation, were applied to determine the error level. Besides, half-cell potential method was employed to detect the corrosion condition of reinforcing steel. The results indicate that the error level is so low (less than 5.0%) that the IR drop can be negligible when the chloride content is relatively lower (0.6% or less by mass of cement). However, the error level is increased with the increase of chloride content. The IR drop is suggested to be compensated when the chloride content is relatively higher (more than 0.6% by mass of cement). At this time, the onset of active corrosion of reinforcing steel is also found.

scholarly journals Effect of Nitrite Inhibitor on the Macrocell Corrosion Behavior of Reinforcing Steel

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Zhonglu Cao ◽  
Makoto Hibino ◽  
Hiroki Goda
Keyword(s):  
Corrosion Behavior ◽  
Current Density ◽  
Polarization Resistance ◽  
Cement Mortar ◽  
Corrosion Current ◽  
Potential Difference ◽  
Reinforcing Steel ◽  
Macrocell Current ◽  
The Relationship ◽  
Macrocell Corrosion

The effect of nitrite ions on the macrocell corrosion behavior of reinforcing steel embedded in cement mortar was investigated by comparing and analyzing the macrocell corrosion current, macrocell polarization ratios, and slopes of anodic and cathodic steels. Based on the experimental results, the relationship between macrocell potential difference and macrocell current density was analyzed, and the mechanism of macrocell corrosion affected by nitrite ions was proposed. The results indicated that nitrite ions had significant impact on the macrocell polarization ratios of cathode and anode. The presence of nitrite could reduce the macrocell current by decreasing the macrocell potential difference and increasing the macrocell polarization resistance of the anode.

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