Materials Performance

SEP 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 SEPTEMBER 2018 FROM THE EDITOR'S DESK W W W.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 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 P M E D I A S A L E S William (Bill) Wageneck CO N S U LTA N T, +1 281-228-6441 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 Corrosion's Impact on the Environment N N ormally, when we think about the impact of corrosion on the environment, we picture oil slicks on lakes and streams where steel pipelines have leaked through corrosion holes, or water-filled streets that f looded when a prestressed concrete water main burst due to corroded wires. As I'm writing this, the collapse of the 51-year-old Morandi Bridge (part of the Polcevera viaduct on the A10 motorway in Genoa, Italy) has shaken that country and the world as we all wonder about the safety of our infrastructure. In the news, experts say that the bridge structure had serious corrosion problems—in particular, corrosion of the stay-cables embedded in concrete, which were difficult to inspect. In addition to the tragic loss of life, the impact on the environment around this bridge is significant. The sheer mass of the tons of concrete, steel rebar, and the 30 vehicles that fell to rest in the dry riverbed and on the railroad tracks created a potential dam and a f lood threat during heav y rains, as well as a block to train travel. With the Polcevera viaduct incapacitated, access to the airport and other cities is diminished. Nearby apartment buildings, as well as the remainder of the bridge, may need to be torn down. Unfortunately, this is a stark reminder that the environment is corrosive to steel, and the impact of that corrosion can have far-reaching effects. The good news is that NACE International members have been and are still working around the world to locate, understand, and mitigate corrosion as it relates to the health of our environment. One of the earliest MP technical articles, written in 1962 (p. 20), focuses on corrosion of soil-side surfaces of oil well casings, which was recognized as a major production cor- rosion problem. A study was designed to determine, among other things, the feasibility of protecting deep wells with cathodic protection (CP) and establishing a practical method to determine CP current requirements. Mitigating corrosion of pipelines that transport carbon dioxide (CO 2 )—the primary greenhouse gas emitted into the planet's atmosphere from fossil fuel combustion—for carbon capture and storage is addressed in the Material Matters article on p. 17. Depend- ing on the CO 2 sources and capture/separation technologies used, the transported CO 2 stream can contain some aggressive impurities that can lead to extensive corrosion of pipe steels. In the technical article on p. 46, risk-based inspection is presented as a way to foresee the operational risk of pressurized process equipment from localized and general corro- sion, pitting, and cracking. The authors of this article conclude that awareness of poten- tial degradation of material properties could proactively reveal the risk of cold cracking of welds. As long as societies around the globe use steel and other materials subject to corro- sion for critical infrastructure and equipment, we all will need the corrosion experts who are continually working to make sure the knowledge and technologies are available to keep the integrity of those systems sound. Kathy Riggs Larsen Editor

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