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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45 NACE INTERNATIONAL: VOL. 56, NO. 3 MATERIALS PERFORMANCE MARCH 2017 Unprecedented Mobile Integration Seamless Online Integration with an Internet Connection. PosiTector Probe Interchangeability Wirelessly connect PosiTector probes to your smart device using our SmartLink and mobile app to turn your cell phone or tablet into a virtual PosiTector gage 1-800-448-3835 www.DeFelsko.com D e Fe l s k o C o r p o r a t i o n Ogdensburg, New York USA +1-315-393-4450 t e c h s a l e @ d e f e l s k o . c o m TM COATINGS & LININGS ESSENTIALS Continued f rom page 43 Continued on page 47 crew members safe from the abrasive, they added another layer of safety concerns to the job: heat. Not only did this project take place during the summer months in Mis- souri when the plant was at its peak, but there were furnaces in the room below working on high demand. "I have much re- spect for these guys for not only performing difficult tasks, such as abrasive blasting, but doing so in temperatures exceeding 120 °F [48.9 °C]," says Strupp. e substrate itself got up to 150 °F (65.6 °C) at times. Strupp explains, "is called for frequent breaks, which slowed production, but kept our men safe from heat stroke." It also called for heat-stress training and the use of climate control cooling vests. With the substrate prepped, the crew was able to move on to the two-component polyurethane primer. ey wore steel-toed boots, gloves, hardhats, safety glasses, and half-face respirators with cartridges while they installed an average of 5 mils (127 µm) of the urethane primer using spray, brush, and roller techniques. All layers of the liq- uid-applied coating system were applied across the floor and ~6 in (152 mm) up the walls. Because the crew members had to work around the coal conveyors that ran almost the entire length of each room, they had to coordinate with the owner's rep at the facil- ity to have the conveyors turned off for short periods of time. When the conveyor belts were on, which was most of the time, the crew worked very carefully around the potentially dangerous equipment to pre- pare the equipment and substrate. Time was crucial in the next step of the coating process: the polyurea. e crew applied an average of 90 mils (2,286 µm) using rented plural-component spray equipment. "We utilize daily toolbox talks and implement Jobsite Safety Analysis forms on all projects," Strupp explains of the Coatings Unlimited crew, which also uses online resources for safety training. "When utilizing a plural-component pump for application of coating materials, I would recommend having plenty of work- ers on hand for handling the hose lines and running the pump. Once the trigger is pulled, you can't necessarily stop to make adjustments to anything; you must keep moving," Strupp says. e crew applied this layer of the system by "flooding" areas where steel beams or holes came through the substrate. In areas with larger gaps, they used foam backer rods prior to applying the polyurea. at helped keep the polyurea from flowing into the rooms below the work area and saved on material. "is solution for the owner's problem came from Creative Polymers of St. Louis, Missouri, who wrote the specification and provided on-site tech- nical support throughout the project," Strupp explains.

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