Materials Performance

MAY 2015

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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16 MAY 2015 MATERIALS PERFORMANCE NACE INTERNATIONAL: VOL. 54, NO. 5 MATERIAL MATTERS Three panels with a zinc-based nanolaminated coating are shown prior to salt fog exposure (left) and after 4,344 h of salt fog exposure (right). Photos courtesy of Modumetal. Continued f rom page 15 the zinc is possible because of the coating's nanolayered architecture. The strength of the coating also can be enhanced, she adds, by creating a nanolayer interface that pre- vents dislocation movement in the alloy. Nanolaminated components using this coating process are commercially avail- able for the oil and gas, aviation, defense, and highway construction industries. Coated products include small-scale tubular joints, valves, connectors, and fasteners. To evaluate the performance of the zinc-based nanolaminated coating in terms of improved corrosion resistance and extended service life of offshore as- sets, laboratory tests have been conducted on metallic test coupons as well as steel fasteners—important components on off- shore assets that corrode in the marine en- vironment and often need to be replaced, Lomasney says. The tests included three types of accelerated corrosion tests and seven different mechanical tests. Addi- tionally, field trials are currently in prog- ress in a tropical offshore environment to verify the results of the laboratory tests. The zinc-based nanolaminated coating consistently demonstrated good results in the standardized coatings tests and the offshore field trial. The experimental methods and results are reported in a paper presented at CORROSION 2015 in Dallas, Texas. 1 Source: Modumetal, Inc., Contact Christina Lomasney, Modumetal— e-mail: Reference 1 M.W. Joosten, J. Vander Laan, S. Lomasney, C. Lomasney, L. Collinson, J. St. Clair, "Nano- Laminated, Metallic Coatings for Corrosion and Abrasion Resistance," CORROSION 2015, paper no. 5735 (Houston, TX: NACE Interna- tional, 2015).

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