Materials Performance

MAR 2017

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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37 NACE INTERNATIONAL: VOL. 56, NO. 3 MATERIALS PERFORMANCE MARCH 2017 12 T. Kob ayashi , " Ef fe ct of Env ironm ental Factors on the Protective Potential of Steel," Proceedings of the 5th International Con- gress on Metallic Corrosion (Houston, TX: NACE, 1972), p. 628. 13 J.J. Perdomo, J.H. Payer, "Chemical and Elec- trochemical Conditions on Steel at Dis- bonded Coatings," Pipeline Research Com- mittee, AGA, Catalog # L51736, June 1995, pp. 109-119. 14 ISO 15589-1: 2015, "Petroleum and natural gas industries—Cathodic protection of pipe- lin e sy st em s — Par t I : O n - l an d pip elin e (Geneva, Switzerland: ISO, 2015). 15 NACE SP0169-2013, "Control of External Corrosion on Underground and Submerged Metallic Piping Syst ems" (Houston , TX: NACE, 2013). This article is based on CORROSION 2016 paper no. 7531, presented in Vancouver, British Columbia, Canada. R.A. (BOB) GUMMOW is with BGummow Enterprises, 121 Twyn Rivers Dr., Pickering, ON L1V 1E1, Canada, email: bgummow@ c o r re n g . c o m . A m e m b e r o f N A C E International since 1963, he is a NACE Corrosion Specialist and Professional Engineer with more than 50 years of experience in the application of CP to a wide variety of structures in many indus- tries. He has presented over 50 papers on topical aspects of CP. He received two NACE Technical Achievement Awards and the Colonel Cox Award for Corrosion Engineering. SORIN SEGALL is vice president of techni- cal engineering at Corrosion Service Co., Ltd., 9-280 Hillmount Rd., Markham, ON L6C 3A1, Canada. He has more than 40 years of experience in corrosion engineer- ing, including CP, mitigation of alternating current (AC)-induced voltages, AC corro- sion, and direct assessment of external corrosion. A member of NACE for more than 20 years, he is a NACE Cathodic Protection Specialist and Professional Engineer. He has an M.Sc. degree in electrical engineering. DANIEL FINGAS is the technical engineer- ing manager at Corrosion Service Co., Ltd., email: dfingas@corrosionservice.com. He is a NACE Cathodic Protection Specialist and Professional Engineer. His experience in the oil and gas industry includes extensive work with pipeline integrity assessment for external corro- sion, HDD testing, and stray current testing. He has an M.A.Sc. degree in electrical engineering and has been a NACE member since 2010. Editor's note: Learn more about cathodic protection for steel structures buried in soil in this new Materials Performance quarterly special feature, "The Science Behind It." Now that you've read the MP article about the effect of pH and degree of environmental aeration on the corrosion rate, explore the science behind the corrosion problem, which is presented in these related CORROSION articles: Y. Hosokawa, F. Kajiyama, Y. Nakamura, "New Cathodic Protection Criteria Based on Direct and Alternating Current Densities Measured Using Coupons and Their Ap plication to Modern Steel Pipelines," Corrosion 60, 3 (2004): pp. 304-312. http://corrosionjournal.org/doi/ abs/10.5006/1.3287735 F. Brichau, J. Deconinck, "A Numerical Model for Cathodic Protection of Buried Pipes," Corrosion 50, 1 (1994): pp. 39-49. http://corrosionjournal.org/doi/abs/10.5006/1.3293492 G.-L. Song, C.-N. Cao, H.-C. Lin, "A New Technique for Correlation of Underground Corrosion," Corrosion 51, 7 (1995): pp. 491-497. http:// corrosionjournal.org/doi/abs/10.5006/1.3294369 A.W. Peabody, "Use of Magnesium for Cathodic Protection of Pipe Lines in High Resistivity Soil," Corrosion 15, 9 (1959): pp. 65-70. http:// corrosionjournal.org/doi/abs/10.5006/0010- 9312-15.9.65 L.P. Sudrabin, F.W. Ringer, "Some Observations on Cathodic Protection Criteria—A Contribution to the Work of NACE Technical Unit Committee T-2C On Minimum Current Requirements," Corrosion 13, 5 (1957): pp. 81-87. http://corrosionjournal.org/doi/abs/10.5006/0010-9312- 13.5.81 An Alternative View of the Cathodic Protection Mechanism on Buried Pipelines

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