CoatingsPro Magazine

JAN 2019

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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Page 44 of 108

44 JANUARY 2019 COATINGSPROMAG.COM (176.5 m²) of the dry area. Aerolon is a spray-applied thermal insulating coating made using an efficient insulating solid called aerogel. With a low thermal conductivity value of 35 mW/mK, Aerolon helps reduce condensation by keeping surfaces above the dew point. It is often used on the dry interior portions of tanks and in pipe galleries to control condensation and prevent problems associated with corrosion under insulation (CUI) and thermal transfer. e insulating coating was new to the Ozark team, so Darrin and Penny sent the crew to Tnemec's corporate headquarters in Kansas City, Missouri, to get a firsthand look and to complete the training. "Our company and the client knew that this was an amazing product for our future, but it's one that we hadn't used yet," explained Penny. "We knew our crew could rise to the challenge, train, and do an excellent job." e Tnemec technician showed them the step-by-step process and nuances that they could expect when applying the product inside the tank. is allowed the team to use Aerolon in-shop before applying it in the field. Aerolon can be applied thicker than other insu lat- ing coatings; it is capable of being bui lt up to 40 –50 mi ls (1,016.0 –1,270.0 microns) DFT in one coat. For this tank, the crew used an airless pump to apply t wo coats of the Aerolon at an average of 50 mi ls (1,270.0 microns) DFT each. T hey wore Ty vek suits, gloves, and an air-fed hood for this stage of the job. e crew learned that when spraying, the Aerolon should not be allowed to spatter on the other parts of the water tank that were already coated. Aerolon is not NSF-approved and, therefore, cannot be used in areas of the tank that are in contact with potable water, such as the wet bowl. is can be a challenge because the access tube is so narrow, so the crew learned to use Visqueen plastic sheeting to keep the coating contained and away from the other areas. e crew finished this section with a coat of Tnemec 1028, an acrylic polymer, which they spray applied at an average of 2.5 mils (63.5 microns) DFT using a Graco airless sprayer. Final Steps T he Ozark team finally moved to the exterior of the tank, blasting it to achieve NACE No. 3/SSPC-SP 6. T he exterior of the tower was the largest section, totaling 9,755 square feet (906.3 m²). T hey applied a full prime coat of Tnemec 94 -H₂0 at 2.5–3.5 mils (63.5–88.9 microns) DFT and a full intermediate coat of Tnemec 1075 at 2–3 mils (50.8 –76.2 microns) DFT. Finally, the team applied a full finish coat of Tnemec 700, a f luoropoly mer finish coat made to provide long-term color and gloss retention, at 2–3 mils (50.8 –76.2 microns) DFT. T his entire exterior coating system was roller applied. Ozark aced the tank test: ey learned how to use an excit- ing new product and completed the project in two months. Even better, the customer is thrilled. e employees of Missouri 's PWSD #1 can tell that less condensation has built up in the areas of the dry riser. Penny was pleased but not sur prised by the outcome. " We have the most amazing crew," she said. " T heir reputations ref lect what we have tried to instill as our company values — integrity, respect, and honesty. I'm so proud of these boys." CP VENDOR TEAM 3M Safety equipment manufacturer 3M Center St. Paul, MN 55144 (888) 364-3577 Black Beauty by HARSCO Material manufacturer 5486 State Rte. 7 N Cheshire, OH 45620 (304) 845-0211 Clemco Industries Corp. Equipment manufacturer One Cable Car Dr. Washington, MO 63090 (636) 239-0300 Davis Instruments Corporation Equipment manufacturer 3465 Diablo Ave. Hayward, CA 94545 (510) 732-9229 Graco Inc. Equipment manufacturer 88 11th Ave. NE Minneapolis, MN 55413 (844) 241-9504 Tnemec Coatings manufacturer 123 W 23 rd Ave. North Kansas City, MO 64116 (816) 474-3400 Tyvek by DuPont Safety equipment manufacturer 5401 Jefferson Davis Hwy. Richmond, VA 23234 (800) 931-3456 In general, the crew continued to focus on safety. They wore gloves, masks, and hard hats, and they delivered a tank with less condensation buildup on the dry riser. Missouri Water Tower

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