Materials Performance

NOV 2014

Materials Performance is the world's most widely circulated magazine dedicated to corrosion prevention and control. MP provides information about the latest corrosion control technologies and practical applications for every industry and environment.

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45 NACE INTERNATIONAL: VOL. 53, NO. 11 MATERIALS PERFORMANCE NOVEMBER 2014 welding repairs to the substrate. After welding repairs and detergent washing, the surfaces were prepared by dry abrasive blast cleaning. We found that the production rates of UHPW J, if set up properly using skilled operators, were better than with abrasive blasting. A: In my experience, there was signifcant time between removal of the old coating and application of the new system. If there is no need for nonde- structive testing and welding repairs or modifcations to the vessel, it may be more economical to remove the old coating and prepare the surface for the new coating in one operation. If that is the case, abrasive blasting may be more economical, despite being slow. If so, you may also have to look at a holding primer, dehumidifcation, or both. It's a numbers exercise, really. A: I would think that abrasive blast- ing would be your best bet. It will remove the coating and give you a surface profle for the recoat all in one process. A: I believe UHPW J is your best option. You will spend hours and hours and much money removing thick flm coating with grit blasting. You will be days ahead on your schedule and budget if you UHPW J and then grit blast. MP — The Infuence of a Grounding System on Cathodic Protection Monitoring Pipelines for Microbiologically Infuenced Corrosion Effects of Highly Polluted Atmospheres on Power Distribution Systems Effect of Iron Oxide on Calcium Carbonate Inhibitors—Part 2 Infuence of Mg Addition on Corrosion Behavior of Ion Vapor Deposited Al Coatings Should Supercritical CO 2 Pipelines Comply with NACE MR0175/ISO 15156?

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