Materials Performance

AUG 2018

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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W W W.MATERIALSPERFORMANCE.COM 8 AUGUST 2018 FROM THE EDITOR'S DESK WWW.MATERIALSPERFORMANCE.COM w w w.materialsper EDITORIAL MA N AG I N G E D I TO R - I N - C H I E F Gretchen A. Jacobson E D I TO R Kathy Riggs Larsen T E C H N I C A L E D I TO R Jack Tinnea, Tinnea Associates, LLC S TA F F W R I T E R Ben DuBose E D I TO R I A L A S S I S TA N T Anthony Punt P R O D U C T MA N AG E R, Husna Miskinyar E L E C T R O N I C M E D I A GRAPHICS E L E C T R O N I C P U B L I S H I N G Teri J. Gilley CO O R D I N ATO R G R A P H I C S D E S I G N E R Michele S. Jennings ADMINISTRATION C H I E F E X E C U T I V E O F F I C E R Rober t (Bob) H. Chalker G R O U P P U B L I S H E R William (Bill) Wageneck A S S O C I AT E P U B L I S H E R Eliina Lizarraga ADVERTISING S A L E S MA N AG E R Diane Gross, +1 281-228-6446 S A L E S D E V E LO P M E N T Tiffany Krevics R E P R E S E N TAT I V E, +1 281-228-6411 S A L E S S P E C I A L I S T Kaci Lamb, +1 281-228-6459 K E Y ACCO U N T E X E C U T I V E Eric Freer, +1 281-228-6292 M E D I A S A L E S R E P R E S E N TAT I V E Janis Mason, +1 847-234-6402 M E D I A S A L E S R E P R E S E N TAT I V E Leslie Whiteman, +1 281-228-6248 M E D I A A DV E RT I S I N G Brenda Nitz CO O R D I N ATO R, +1 281-228-6219 NACE International Contact Information Tel: +1 281-228-6200 Fax: +1 281-228-6300 Email: Firstser Web site: w w EDITORIAL ADVISORY BOARD Zahid Amjad, FNACE Walsh University Susan Borenstein General Dynamics Electric Boat Raul A. Castillo Consultant Ir vin Cotton Ar thur Freedman Associates, Inc. Wayne Frenier Frenier Chemical Consultants Fred Goodwin BASF Construction Chemicals, LLC David D. He Corrpro Jerr y Holton Specialty Polymer Coatings USA, Inc. W. Brian Holtsbaum Corsult Associates (1980), Ltd. Russ Kane iCorrosion, LLC Ernest Klechka CITGO Petroleum Corp. Kur t Lawson Mears Group, Inc. Lee Machemer Jonas, Inc. John S. Smar t III John Smar t Consulting Engineer Battling Corrosive Salts from the Seas I I nfrastructure and assets in or near marine environments are particularly susceptible to corrosion because seawater contains a significant concentration of dissolved salts that are very corrosive to metals. And corrosion in marine environ- ments can be costly. NACE International reports that the estimated total cost of marine corrosion worldwide annually is between $50 billion to $80 billion. Solutions for preventing asset degradation and preserving structures near coasts and waterways have been sought for many years by industries such as those who own or oper- ate manufacturing and chemical processing facilities, power plants, highway bridges, port infrastructure, ships and boats, offshore wind farms and other subsea energ y proj- ects, shipyards, subsea pipelines—basically any business with equipment that is in or near the water. This month's 75th Anniversary MP Classic article on p. 32, written almost 30 years ago by Ralph W. (Bud) Ross, Jr. and Arthur H. Tuthill, presents a practical guide to using marine fasteners. The article reviews the marine corrosion resistance of fasteners made from copper, iron, nickel, aluminum, and titanium alloys, as well as coated steel, and presents several alloys as candidate materials. Today, efforts continue all over the world to find corrosion solutions. For example: To assess the corrosivity of the underwater environments at the Yamal LNG carrier terminal in Siberia, Russian Federation, and identify the specific cathodic protection requirements in these environments, a corrosion study was conducted at the site, which is described in the feature article on p. 26. In Alaska, at the City of Juneau's Steamship Wharf and adjacent Marine Park, corro- sion repairs and upgrades were made to steel H-piles and a sheet pile seawall. In the tech- nical article on p. 38, authors Ryan Tinnea, Madeline Lee, and Erich Schaal discuss the corrosion challenges of this project that stemmed from the seawater environment, as well as additional obstacles such as remoteness of the area and population sparsity. When charged with predicting corrosion rates of carbon steel exposed to atmo- spheres in coastal, industrial, and rural areas in Taiwan, researchers used an artificial neural network to set up a forecasting model for metallic corrosion. Details of this project are provided in the technical article by C.M. Lo, et al., on p. 58. Copper-nickel alloy is frequently chosen for use in seawater applications such as bal- last tanks, but how does it stand up when the seawater has been treated for antifouling? In a study of the effects of seawater on ballast tanks dosed with chlorine, South Korean researchers examined the levels of bacterial control and corrosion of CuNi 90/10 alloy when exposed to various amounts of chlorine in seawater. More can be found in the Material Matters article on p. 14. Projects such as these are expected to continue as many corrosion professionals and others look for ways to prevent the deterioration of their assets in the presence of salt- laden marine atmospheres and corrosive chlorides. After all, the oceans cover ~70% of the Earth, and that water is salty. Kathy Riggs Larsen Editor

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