Materials Performance

JUN 2019

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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39 MATERIALS PERFORMANCE: VOL. 58, NO. 6 JUNE 2019 Continued on page 40 for the client on this job, EonCoat and Dong-buk E&C had both the expertise and steely resolve to answer any challenges that came their way. is article was originally published on the CoatingsPro web site on May 2, 2019, Reprinted with permission. Thixotropic Gel Halts Subsea Corrosion of Carbon Steel A recently released gel system from Flexlife (Aberdeen, United Kingdom) is designed to halt the corrosion of carbon steel (CS) in sub- sea flexible and steel risers in locations, such as outer sheaths or other areas with dam- aged coatings. e system displaces oxygen- ated seawater from the region of the damage while replacing it with a noncorrosive gel. Known as FlexGel, the products can also be used inside tubes to eliminate the air-water interface and coat the damaged riser, thus protecting both the riser's out- side diameter and the inside diameter of the tube. e gels can also be injected into flexible riser repair clamps used in subsea locations to form a flexible seal and prevent further corrosion. ey can be installed both as a preventive measure for new assets, or as a method to extend the life of aging assets. According to the company, the gel sys- tem's thixotropic nature allows it to be pumped easily. Yet within 48 h of applica- tion, the system's viscosity increases signifi- cantly to prevent splashing or a loss of gel due to waves and vessel motions. For some applications, biocides can be added to the gel mixture to prevent microbiologically influenced corrosion (MIC). e system was one of 10 winners at the 2019 MP Corrosion Innovation of the Year Awards, honored in March 2019 in Nash- ville, Tennessee, USA. Further technical details on the gels are available at the awards web site, mp-innovation-awards. The deployment process to install FlexGel in the annulus between an I-tube and riser. Image courtesy of Flexlife. + 1-315-393-4450 l 1-800-448-3835 l Surface Profile Multiple Measuring Solutions WiFi H Replica Tape Reader Surface Profile Gage Digital depth micrometer measures and records peak-to-valley surface profile heights n Alumina wear face and tungsten carbide tip for long life and continuous accuracy n Fast measurement rate of over 50 readings per minute – ideal for quickly and accurat ely measuring large surfaces n Cabled probes available for blasted steel, textured coatings and concrete profile Digital spring micrometer measures and r ecords surface profile parameters using Testex Press-O-Film™ replica tape n Impr oved peak-to-valley height accuracy over conventional spring micrometers n Linearization feature increases measurement accuracy and reduces tape consumption PosiTect or Award Winning I nt erchangeable Platf orm Accept s A LL coat ing t hickness, envir onment al, sur f ace pr of ile, salt cont aminat ion, har dness and ult r asonic wall t hickness pr obes. N EW P o siTe c t o r R TR 3 D – capt ur e 3D sur f ace imagery and par amet er s such as R a, R z, Sq, Spd, and mor e

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