Potential and current distribution across different layers of reinforcement in reinforced concrete cathodic protection system- A numerical study

2020 ◽  
Vol 262 ◽  
pp. 120580
Author(s):  
Arpit Goyal ◽  
Ezekiel Kehinde Olorunnipa ◽  
Homayoon Sadeghi Pouya ◽  
Eshmaiel Ganjian ◽  
Adegoke Omotayo Olubanwo
Keyword(s):  
Reinforced Concrete ◽  
Current Distribution ◽  
Cathodic Protection ◽  
Numerical Study ◽  
Protection System ◽  
System A ◽  
Cathodic Protection System

scholarly journals Cathodic Protection Simulation of Linear Anode Alongside Coated and Uncoated Pipe

CORROSION ◽  
10.5006/3377 ◽  
2020 ◽  
Vol 76 (4) ◽  
pp. 385-397 ◽  
Author(s):  
Mehdi Attarchi ◽  
Marco Ormellese ◽  
Andrea Brenna
Keyword(s):  
Numerical Simulation ◽  
Current Distribution ◽  
Cathodic Protection ◽  
Defect Size ◽  
Protection System ◽  
Effective Parameters ◽  
Soil Resistivity ◽  
Fundamental Parameters ◽  
Shift Criterion ◽  
Cathodic Protection System

Linear anode-pipe arrangement cathodic protection system with a complete nonlinear cathode boundary condition is analyzed by finite element method numerical simulation to extract the effective parameters for both coated and uncoated pipe. The results show that defect size ratio, linear anode-to-pipe distance, and pipe diameter are fundamental parameters to design an effective cathodic protection system able to guarantee a proper current distribution. Soil resistivity has a significant effect on the current distribution of both coated and uncoated pipe. The results show that the 100 mV potential shift criterion for a single linear anode-pipe arrangement can be ineffective and a two anode system may be required.

The Experimental Measurement on the Throwing Power of Sacrificial Anode Cathodic Protection for Concrete Piles in Natural Sea Water

2015 ◽  
Vol 1125 ◽  
pp. 350-354 ◽  
Author(s):  
Jin A Jeong ◽  
Chung Kuk Jin
Keyword(s):  
Reinforced Concrete ◽  
Cathodic Protection ◽  
Sea Water ◽  
Protection System ◽  
High Resistivity ◽  
Sacrificial Anode ◽  
Throwing Power ◽  
Water Line ◽  
Concrete Piles ◽  
Cathodic Protection System

This paper represents the experimental studies on the throwing power of sacrificial anode cathodic protection system applied to reinforced concrete piles in salt water condition by means of zinc anodes. Many previous studies show the effectiveness of sacrificial anode cathodic protection system, however, the major problem of sacrificial anode cathodic protection system is limited a distance to the point reaching protection current from the anode in high resistivity environments such as concrete, etc. In case of concrete pile in sea water condition, it should be combined submerged zone, tidal zone, splash zone, and atmospheric zone. In this study, the cathodic protection current by zinc sacrificial anodes was limited to scores of centimeters above the water line with tidal, depending on the concrete resistivity. Experimental tests were carried out on pile type reinforced concrete specimens with the change of water level. The test factors were corrosion and protection potential, current, and 4 hour depolarization potential. As a result of tests, cathodic protection current by zinc sacrificial anode was influenced up to about 10cm above the water line, and high resistivity areas such as atmospheric zone could not be protected with this system.

Utilization of Variable Resistor for Improvement of Impressed Current Cathodic Protection System on Reinforced Concrete Structures

2015 ◽  
Vol 1125 ◽  
pp. 365-369
Author(s):  
Jin A Jeong ◽  
Chung Kuk Jin
Keyword(s):  
Reinforced Concrete ◽  
Relative Humidity ◽  
Cathodic Protection ◽  
Protected Area ◽  
Protection System ◽  
Mixed Metal Oxide ◽  
Variable Resistor ◽  
Impressed Current ◽  
Cathodic Protection System ◽  
Impressed Current Cathodic Protection

This study is to acquire the confirmation data regarding the impressed current cathodic protection (ICCP) system by using the variable resistor for reinforced concrete specimens for improvement in under-protected area of reinforced concrete specimens. The ICCP system is one of the most promising corrosion protection methods. The Effect of ICCP system can be changed at diverse conditions. Particularly, temperature and relative humidity plays a crucial role in the CP effect. It was possible to confirm the performance of ICCP system by the use of variable resistor in different relative humidity and temperature conditions. The CP potential and current were measured by potentiostat, and 4 hour depolarization potentials were measured after disconnecting with anode for 4 hours. To enhance the effect of cathodic protection system, seawater was used as an electrolyte. Used anode for ICCP system was mixed metal oxide (MMO) titanium. From this study, it could be confirmed that the CP potential and current were highly influenced by temperature and relative humidity, and the CP effect in under-protected area has been improved by the ICCP system using the variable resistor.

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