JPCL March 2019

 
JPCL March 2019


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Penny-Wise or Pound-Foolish?: Holding Primers for Solvent-Free Epoxy Tank Linings

by Mike O’Donoghue, Ph.D. and Vijay Datta, MS, International Paint LLC; and Margaret Pardy, Mag Consulting Inc.

This article discusses performance and productivity issues associated with a tandem approach of using a thin-film solvent-borne epoxy holding primer (especially over pitted steel) with a topcoat of solvent-free epoxy lining, as opposed to using a single coat of a solvent-free lining applied direct-to-metal. The ramifications of pitted steel, abrasive blast profiles, times to complete lining applications, holidays in the linings and the effect of solvents and proper choice of holding primer are outlined with respect to the ultimate performance of the lining systems.


Long-Term Corrosion Protection for Buried Pipelines: Cutting Cathodic Protection Cost with Non-Shielding Coatings

by Dr. Jeffrey David Rogozinski, Sherwin-Williams Protective & Marine Coatings

Buried transmission pipelines face a constant safety threat from corrosion. Pipeline owners and operators typically specify the application of an external barrier system to supplement the impressed current cathodic protection (ICCP) system, such as a coating or wrap, to the pipe to provide primary corrosion protection. A further aspect of the barrier coating is that it reduces the energy consumption requirements of the ICCP. This article discusses how the combination of FBEs and ICCP systems can help pipeline operators safely, efficiently and cost-effectively move assets.


Inspecting CUI Systems with Equipment in Service

by Peter Bock, Performance Polymers Americas LLC

Traditional methods of in-service inspection of CUI coating systems are extremely expensive, difficult and usually unsatisfactory. However, several recent technological developments have helped improve the accuracy and efficiency of in-service inspection of CUI systems. This article describes the use of thermal imaging, buried self-powered transducers, high-efficiency blanket insulation and more, allowing cost-effective and more frequent inspection of larger percentages of CUI coatings than was possible in the past.


   
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