Impressed-Current Cathodic Protection of Steel-Reinforced Concrete Pilings: Protection Criteria and the Threshold for Hydrogen Embrittlement

CORROSION ◽  
1998 ◽  
Vol 54 (5) ◽  
pp. 389-402 ◽  
Author(s):  
D. G. Enos ◽  
A. J. Williams ◽  
G. G. Clemeña ◽  
J. R. Scully
Keyword(s):  
Reinforced Concrete ◽  
Hydrogen Embrittlement ◽  
Cathodic Protection ◽  
Steel Reinforced Concrete ◽  
Impressed Current ◽  
Impressed Current Cathodic Protection

Characterization of Thermal-Sprayed Titanium Anodes for Cathodic Protection

1997 ◽  
Author(s):  
G.R. Holcomb ◽  
S.D. Cramer ◽  
S.J. Bullard ◽  
B.S. Covino ◽  
W.K. Collins ◽  
...  
Keyword(s):  
Cathodic Protection ◽  
Thermal Spraying ◽  
Atmospheric Gases ◽  
Steel Reinforced Concrete ◽  
Protection Systems ◽  
Titanium Coatings ◽  
Impressed Current ◽  
Impressed Current Cathodic Protection ◽  
Lower Resistivity

Abstract Thermal-sprayed titanium coatings were investigated as anodes for impressed current cathodic protection systems for steel reinforced concrete structures. The coatings were applied by twin-wire thermal-spraying using air and nitrogen as atomizing gases. The coatings were non-homogeneous due to oxidation and nitridation of the molten titanium with the atmospheric gases oxygen and nitrogen. The primary coating constituents were α-Ti (containing interstitial nitrogen and oxygen), γ-TiO and TiN. Nitrogen atomization produced coatings with less cracking, more uniform chemistry, and lower resistivity than air atomization.

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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