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STEEL 2019

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STEEL SURFACES 2019 COATINGSPROMAG.COM 6 Steely Resolve: How Contractors Can Overcome Steel's Challenges By Ben DuBose Photos Courtesy of Aggreko, Belzona, DESCO Manufacturing, Gardco, Induron, Montipower, Sherwin-Williams, Tnemec, and U.S. Minerals F or contractors dealing with steel substrates, one of the only constants is change. With potential appli- cations including sectors such as maritime, oil and gas, bridges, water/wastewater, power generation, and even roofing, and with projects that can be both interior and exterior, hardly any two jobs are alike. us, understand- ing the unique needs of each individual jobsite is critical. "I think one of the greatest differences with steel is the impact the environment can have on it before you're able to coat it," said Nick Dunn, sales manager with temporary power, heating, cooling, and dehumidification equipment provider Aggreko. "You can have oxidation, rust, things like that, and from there, it can create a whole list of struggles." e options available for materials, equipment, and processes are almost limitless. To help narrow it down, CoatingsPro Magazine spoke to leading industry experts and companies across the numerous phases and steel sectors. Know Thy Substrate One initial priority is determining the exact type of substrate. "People use steel as a generic term, from basically cast iron, carbon steel, and stainless steel, all the way up to exotic alloys," said Barry Nisill, vice president of business development at protective coatings and repair composites manufacturer Belzona. "But they all behave differently, especially when it comes to the types of corrosion and the preparation you're able to achieve. It's important to know what kind of steel you're working with in the first place, and whether it is new or if it has been exposed to certain conditions." For example, Nisill said "new steel " may sit on a cargo ship for weeks heading to its destination, and exposure to salt air and water could impregnate the substrate. "e ambient conditions, such as temperature, substrate temperature, and relative humidity, are some of the conditions where steel is a little more of a vulnerable substrate versus something like concrete," said Ben Rowland, technical service director with Induron Protective Coatings. "You have to consider the ambient conditions in different ways than you would with other substrates. Especially with respect to humidity." Correctly identifying the substrate is an essential first step because it should also drive the selection of the new coating system as well as processes and equipment used. "You're always going to look first at the substrate and the desired performance, and then backfill from there as far as the chemical systems and the formulations for that applica- tion," said Murph Mahaffey, director of international sales for Polyurethane Machinery Corp. (PMC). Belzona's Nisill recommends an early checklist before beginning any project. "We have a simple checklist that narrows down the choices," he said. "First of all, what kind of Correctly identifying the substrate is an essential first step because it should also drive the selection of the new coating system as well as processes and equipment used. Steel Surfaces

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