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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71 NACE INTERNATIONAL: VOL. 54, NO. 5 MATERIALS PERFORMANCE MAY 2015 Conclusions and Recommendations Based on the experimental results and discussion, the following conclusions and recommendations can be drawn: • The pipe material did not contribute to the failure as it was the correct ma- terial for the application and con- formed to the specified standards. • Failure of the external coating on the in a c c e ssi bl e p or tion of th e pip e caused severe localized corrosion and pitting. • The root cause of the failure was cor- rosion fatigue. • Suitable coating of the external sur- face of the pipe with careful applica- tion at the inaccessible portion of the pipe is recommended • Eliminating sources of fatigue by im- proving the line suspension system and increasing the fixation points near the inaccessible portion wher- ever possible is also recommended. References 1 R . Ebara, "Corrosion Fatigue Phenomena Learned from Failure Analysis," Eng. Failure Analysis 13 (2006): pp. 516-525. 2 R . Barr y D o ol ley, A. Bursi k, "Corrosion Fatigue," Power Plant Chem. 11, 10 (2009): pp. 586-591. 3 N.W. Sachs, Practical Plant Failure Analysis (New York, NY: CRC Press, 2007). 4 H. Kaesche, "Corrosion of Metals," Engineer- ing Materials and P rocesses (Berlin, Ger - many : Springer Berlin Heidelberg, Brain Derby, 2003), pp. 525-543. 5 J. Congleton, I.H. Craig, Corrosion Processes, R.N. Parkins, ed. (London, U.K.: Applied Sci- ence Publishers London, 1982), p. 209. 6 R .L. Prowse, M.L. Wayman, "Effect of Envi- ronment on the Fatigue Behavior of a Me- dium Carbon Steel," Corrosion 30, 8 (1974): pp. 280-284 (published online 2013). 7 P.C. Paris, F. Erdogan, J. Basic Engineering, ASME Trans. 85 (1963): p. 528. 8 A S M Ha n d b o ok Volu m e 13A, C orrosi on : Fundamental, Testing and Protection, S.D. Cramer, B.S. Covino, eds. (Materials Park, OH: ASM, 2003), pp. 946-958. 9 API Spec 5L X52, "Specification for Line Pipe" (Washington, DC: API). MOHAMED HANAFY EL-SAYED is head of the training school, IWE, ATB, at the Central Metallurgical R&D Institute (CMRDI), PO Box 87, El-Tabeen, Helwan, Cairo, Egypt, e-mail: hanafys@hotmail. com. He received his Ph.D. in production engineering from JWRI of Japan. He conducts research and publishes in the areas of welding, brazing, soldering, and solid state joining. He is a lecturer in materials science, welding, and brazing for engineers working in the industrial sector in Egypt. He performs in situ metallogra- phy and replica testing for power plant, petrochemical, oil and gas, and cement companies, as well as failure analyses in these sectors. A 21-year member of NACE International, El-Sayed received a Award of the Japan High Temperature Society for a special invited lecture during a 2002 conference. of Readers Have a Role in Product Decisions 88 % 2.6 Readers per copy Potential Reading Audience 85,000 Take Action! 92% • Bought Products/Services • Recommend Products/Services • Visited Advertiser's Web Site • Discussed /Referred Ads and Articles • Connected via Social Media ADVERTISING OPPORTUNITIES Upcoming ISSUE EDITORIAL SPECIAL SECTION September Refinery and Chemical Processing Corrosion Company Showcase October Concrete Structure Corrosion | CORROSION 2016 Advance Program CORROSION 2016 Advance Program August Oil and Gas Pipeline Corrosion | Corrosion Control for Storage Tanks Call Diane Gross today at +1 281-228-6446 Corrosion Fatigue Failure of a Water Injection Line in Oil Operation

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