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Picture for 03197 A POTENTIAL ATTENUATION EQUATION
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03197 A POTENTIAL ATTENUATION EQUATION FOR DESIGN AND ANALYSIS OF PIPELINE CATHODIC PROTECTION SYSTEMS WITH DISPLACED ANODES

Product Number: 51300-03197-SG
ISBN: 03197 2003 CP
Author: Diane K. Lysogorski, William H. Hartt
Publication Date: 2003
$20.00

Potential attenuation equation for pipelines and risers with multiple, equally spaced, identical superimposed spherical (bracelet) galvanic anodes that incorporates all relevant resistance terms (anode, coating, polarization, and metallic return path) has been modified for situations where anodes are displaced.
Picture for Optimizing Current Distribution in Reinforced Concrete Cathodic Protection Systems
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51316-7257-Optimizing Current Distribution in Reinforced Concrete Cathodic Protection Systems

Product Number: 51316-7257-SG
ISBN: 7257 2016 CP
Author: Calvin Pynn
Publication Date: 2016
$20.00

This paper presents examples of anode array arrangements and corresponding attenuation characteristic calculations to enable optimization of current distribution.  It also presents examples of return current imbalances and how they may be corrected.
Picture for A Right Way To Calculate Pipe CP Potential Attenuation
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A Right Way To Calculate Pipe CP Potential Attenuation

Product Number: 51322-17599-SG
Author: John Yang, Jiulong Liang
Publication Date: 2022
$20.00

Shown on Figure 1 is a typical impressed current CP diagram. When the rectifier is first turned on, i.e. time t=0, there is no polarization yet. At that moment, the applied DC voltage is fully consumed by IR drops at anode (IRa0) and cathode (IRc0), plus original potential difference between anode and pipe (Eoca- Eocc). When t=0, the current is at the greatest value. Over time when polarization kicks in, due to adding polarization resistance, the current is gradually reduced.
Picture for Cathodic Protection Of Mooring Chain In Offshore Environment
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Cathodic Protection Of Mooring Chain In Offshore Environment

Product Number: 51322-17722-SG
Author: Faisal Shahzad, Nils Olav Digre, Kristian Varne
Publication Date: 2022
$20.00

Corrosion in Mooring systems for permanently moored floating production units has been identified as a problem area by authorities as well as industry. A Joint Industry Project (JIP) initiated by the Bureau of Safety and Environmental Enforcement (BSEE) with participation from major global oil and gas operators as well as equipment suppliers was established in 2014 to review the problem area. 1 Studies performed as a part of this program have shown that especially mooring chains located in tropical waters have shown signs of rapid corrosion, both general and localized with corrosion rates significantly larger than those specified in design standards. Increased corrosion allowance, as well as increased inspection requirements, have been recommended and corrosion has been reported as the leading cause for pre-emptive replacement of mooring.
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