Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Use GIVING24 at checkout to save 20% on eCourses and books (some exclusions apply)!

51318-10901-Overall Effect of Vapor Corrosion Inhibitors on Casing Corrosion Mitigation

Picture for Overall Effect of Vapor Corrosion Inhibitors on Casing Corrosion Mitigation
Available for download

To evaluate effectiveness of the vapor corrosion inhibitors (VCI) in the cased-crossing application. Specifically, to examine electrochemical properties of 2 commercially available VCIs, and their effect on delivery of cathodic protection current to carrier pipe.

Product Number: 51318-10901-SG
Author: Pavan K. Sukla / Len J. Krissa / Jerry DeWitt
Publication Date: 2018
Industry: Corrosion Monitoring and Control
$0.00
$20.00
$20.00

This work was conducted to evaluate effectiveness of the vapor corrosion inhibitors (VCIs) in the cased-crossing application. Specifically, the work was conducted to characterize electrochemical properties of two commercially available VCIs, and their effect on delivery of cathodic protection (CP) current to carrier pipe. Both experimental and modeling studies were conducted. Experimental studies were conducted with VCI gels, VCI only, and gel only solutions. Modeling was conducted to estimate the diversion of the CP current to casing when casing annuli are filled with the VCI gel solutions. It was found that the two commercially available VCIs performed well in the VCI gel formulations, and provided high level of corrosion protection to the carrier pipe inside the casing. In addition, both VCI gel formulations have low resistivity; therefore, a fraction of CP current could get diverted to the casing. This was confirmed in a large–scale testing. The diversion of the CP current needs to be analyzed on a case-by-case basis. The extent of CP current diversion was different for the two VCIs. It was noticed that one VCI formulation shifts the corrosion potential of the carrier pipe metal in the electronegative direction, as a result, the CP current demand and CP current diversion amounts are lower compared to other VCI formulation. The risk of hydrogen generation and accumulation due to diversion of the CP current through the casing was also evaluated. It was found that hydrogen generation commences even at the CP density of 1,000 mA/m2. However, hydrogen effect is mitigated due to VCI gels’ high viscosity, and their ability to buffer hydroxyl ions produced during the hydrogen evolution reaction.

Key words: Vapor Corrosion Inhibitors, Cased Crossings, Cathodic Protection, Hydrogen Generation.

This work was conducted to evaluate effectiveness of the vapor corrosion inhibitors (VCIs) in the cased-crossing application. Specifically, the work was conducted to characterize electrochemical properties of two commercially available VCIs, and their effect on delivery of cathodic protection (CP) current to carrier pipe. Both experimental and modeling studies were conducted. Experimental studies were conducted with VCI gels, VCI only, and gel only solutions. Modeling was conducted to estimate the diversion of the CP current to casing when casing annuli are filled with the VCI gel solutions. It was found that the two commercially available VCIs performed well in the VCI gel formulations, and provided high level of corrosion protection to the carrier pipe inside the casing. In addition, both VCI gel formulations have low resistivity; therefore, a fraction of CP current could get diverted to the casing. This was confirmed in a large–scale testing. The diversion of the CP current needs to be analyzed on a case-by-case basis. The extent of CP current diversion was different for the two VCIs. It was noticed that one VCI formulation shifts the corrosion potential of the carrier pipe metal in the electronegative direction, as a result, the CP current demand and CP current diversion amounts are lower compared to other VCI formulation. The risk of hydrogen generation and accumulation due to diversion of the CP current through the casing was also evaluated. It was found that hydrogen generation commences even at the CP density of 1,000 mA/m2. However, hydrogen effect is mitigated due to VCI gels’ high viscosity, and their ability to buffer hydroxyl ions produced during the hydrogen evolution reaction.

Key words: Vapor Corrosion Inhibitors, Cased Crossings, Cathodic Protection, Hydrogen Generation.

Product tags
Also Purchased
Picture for Analysis and Evaluation of Cathodic Protection within a Vapor Corrosion Inhibitor Gel Filled Casing
Available for download

51316-7801-Analysis and Evaluation of Cathodic Protection within a Vapor Corrosion Inhibitor Gel Filled Casing

Product Number: 51316-7801-SG
ISBN: 7801 2016 CP
Author: Len Krissa
Publication Date: 2016
$20.00
Picture for Well Casing CP - Design Issues & Case History
Available for download

51318-10655-Well Casing CP - Design Issues & Case History

Product Number: 51318-10655-SG
Author: Jeffrey L. Didas
Publication Date: 2018
$20.00

Design issues with well casing Cathodic Protection - CP. Need for and benefits of CP discussed. Case history dealing with design issues and what solutions were available and utilized.
Picture for Rapid Assessment of Station Piping CP Effectiveness In High Resistivity Environments
Available for download

51318-10909-Rapid Assessment of Station Piping CP Effectiveness In High Resistivity Environments

Product Number: 51318-10909-SG
Author: Paul Murray / Naeem Khan
Publication Date: 2018
$20.00

Buried station piping at a pipeline pump facility experienced low structure-to-electrolyte potentials after cathodic protection (CP) system commissioning. This paper describes the quick response soil side ER corrosion probe system, data collection, and data analysis.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support