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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41 MATERIALS PERFORMANCE: VOL. 58, NO. 6 JUNE 2019 provides a repair solution for risers or structures that already experience corro- sion problems in this area. Promising Results Francis explains that the system has been tested both in laboratory settings and in the field. In the lab, tests were performed to prove the CS samples did not experience any deg- radation in the gel, and to illustrate the dif- ference between high-strength CS samples immersed in seawater vs. the same steels immersed in the gel. According to the com- pany, the samples showed significant corro- sion in seawater and no corrosion in the gel. Additionally, material compatibility testing was performed for the gel system in contact with common outer sheath materi- als and coatings found on risers. Further testing considered the vibration frequencies at which the gel lowers in viscosity, to prove that floating platform motions would not affect the viscosity of the gel system while in service. In the field, Francis says the company has a client who experienced coating dis- bondment on two steel risers. One of the risers had already experienced a failure due to corrosion, and concerns remained about the safety of an adjacent gas-lift riser. In response, the company installed 5,600 L (1,479.4 gal) of the gel inside the tube to displace water from the critical area. Two years later, the area showed no further corro- sion after the installation of the gel. More recently, after an additional three years, the client says the gel continues to perform as desired and the riser remains in service. e gel system is approved by the Centre for Environment, Fisheries and Aquaculture Science (Cefas), an executive agency of the U.K. government, for use in ocean environments. According to the com- pany, it has already been installed in the North Sea and Gulf of Mexico. Patents for the system, which is now commercially available, have been granted in Australia, Denmark, the United Kingdom, Malaysia, the Netherlands, Norway, and Africa. Source: Flexlife, Contact Kirk Francis, regional director— email: —Ben DuBose Will that new Cathodic Protection rectifier site be "remote" and a challenge to get to? Canadian Office: 780-447-1114 Email: U.S. Office: 918-805-7587 Website: We supply and factory install various Remote Monitoring device brands to reduce your costs and improve personnel safety!

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