The Permanent Anode in Impressed‐current Cathodic Protection Systems—Part 2

1959 ◽  
Vol 6 (11) ◽  
pp. 333-342
Author(s):  
C.A. Curtis
Keyword(s):  
Cathodic Protection ◽  
Protection Systems ◽  
Impressed Current ◽  
Impressed Current Cathodic Protection

Modeling of Impressed Current Cathodic Protection Anode Arrangements for Storage Tank Bottoms

2011 ◽  
Author(s):  
Robert Adey ◽  
John Baynham ◽  
Cristina Peratta
Keyword(s):  
Cathodic Protection ◽  
Economic Consequences ◽  
Design Concepts ◽  
Modeling Methodology ◽  
Protection Systems ◽  
Gas Products ◽  
Impressed Current ◽  
Protection Potential ◽  
The Cost ◽  
Impressed Current Cathodic Protection

Above ground tanks are frequently used for the storage of Oil & Gas products and they can present a challenge to design an optimum corrosion control system. The base of the tank lies on or near the surface of the ground and is in contact with the material used to support the tank and therefore presents a corrosion challenge. One method of protecting the bottom of a tank is by use of an impressed current cathodic protection (ICCP) system. There are a number of types of Cathodic Protection systems which are designed to protect the tank base in these circumstances. The details of the design of such a system are very important for optimal performance and also the cost, if a number of such systems are to be installed The consequence of a poor design can be uneven distribution of protection potential on the tank base or in the worst cases regions where corrosion of the tank base can take place. An over designed system on the other hand can have significant economic consequences both in terms of installation cost and running costs. Computer modeling is now widely used to optimize CP Designs and verify that the design of the cathodic protection (CP) system meets the design requirements. In this paper a modeling tool is presented which enables corrosion engineers to evaluate the performance of tank base CP systems by predicting the protection provided to the tank for a given CP design. The paper describes and discusses all aspects of the modeling methodology, which it then applies to several different design concepts.

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.

Review of Sensitivity Studies for Impressed Current Cathodic Protection Systems

2011 ◽  
Author(s):  
Virginia G. DeGiorgi ◽  
Stephanie A. Wimmer
Keyword(s):  
Cathodic Protection ◽  
Scientific Basis ◽  
Naval Research ◽  
Critical Studies ◽  
Protection Systems ◽  
Sensitivity Studies ◽  
Impressed Current ◽  
The Individual ◽  
Future Work ◽  
Impressed Current Cathodic Protection

The Naval Research Laboratory has conducted investigations into the computational simulations of shipboard cathodic protection systems for several decades providing a scientific basis for the application of computational modeling to corrosion and signature systems. This work has expanded to other facilities and organizations, several of which are commercial in nature. However, much of the individual sensitivity studies which have led to an increased understanding of the behavior of cathodic protection systems have not had a high visibility. In this paper the authors review selected critical studies with notes towards future work. Because of their impact on modeling accuracy and means of defining components the authors have selected variations in electrolyte conductivity, damage modeling approaches, material characterization and paint characterization for review.

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