scholarly journals A Historical Review of Impressed Current Cathodic Protection of Steel in Concrete

2020 ◽  
Vol 1 (1) ◽  
pp. 1-21
Author(s):  
John P. Broomfield
Keyword(s):  
Reinforced Concrete ◽  
Side Effects ◽  
Control Systems ◽  
Cathodic Protection ◽  
Historical Review ◽  
Wide Range ◽  
The World ◽  
History Of ◽  
Impressed Current ◽  
Impressed Current Cathodic Protection

This paper reviews the history of the development of impressed current cathodic protection of atmospherically exposed reinforced concrete from the first trials in 1959 on bridges to recently installed systems on a wide range of structures around the world. The paper covers the research efforts, anode developments, control systems and monitoring sensors which are reviewed and their evolution explained. The research into the potential and actual side effects of cathodic protection currents in concrete are summarised. The development of standards and guidance on impressed current cathodic protection is also reviewed.

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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