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SURFACE 2018

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16 SURFACE PREP 2018 COATINGSPROMAG.COM vacuum with each piece of equipment," EDCO's Stanczyk said. "Failure to provide dust-less equipment could result in stiff OSHA penalties to end users." EDCO's vacuum line, which pairs seamlessly with its surface prep equipment, exceeds the new OSHA standards, according to the company. "You need to use a dust collector that has a filter with 99.9 percent greater efficiency," Stanczyk said. "You need to have a dust collector that takes on 99.9 percent with an exter- nal filter cleaning mechanism that prevents the operator from being exposed to dust and debris." Other vacuuming specialists include Pullman-Ermator and Industrial Vacuum. And other equipment manufacturers include BlastPro, Diamatic, and Novatek. Surface Profiling Before installing new coatings, a specific surface profile is typically required. e precise profile helps ensure optimal adhesion for coatings and effectively serves as an anchor for the new system. Surface profile is usually achieved mechani- cally, with abrasive blasting, shot blasting, and power tooling as popular methods. Blasting can be done either wet, in which a high-powered stream of water is mixed with an abrasive material, or dry, when highly-pressurized air is used in conjunction with abrasives. BlastOne is one of many specialists in this field, and its Tornado XL is a cart-mounted blaster designed to blast tank exteriors and interiors, decks, wind towers, and other large steel structures or flat surfaces. "It comes equipped with two large spinning nozzles that can do the work of five normal blasters at once," said Marketing Administrator Tom Blackham. "It can be mounted on a cart, boom lift, or on a wall, thus reducing any strain on human operators." Primary benefits of the system include increased speed and efficiency, can be used in tandem with the pressure washing and water- jetting processes, as well as abrasive blasting. "Some lower-quality abrasives can contain higher than acceptable levels of chlorides and other salts," said Joyce Wolf, marketing manager at Barton International, a supplier of garnet abrasives for use in surface preparation. "ese residues are often left behind on the substrate, which leads to a condition called osmotic blistering. e result is corrosion under the coating and premature coating failure." CHLOR*RID and HoldTight Solutions are two compa- nies that manufacture chemical treatment products that can be used to remove these soluble salts. HoldTight's flagship product — the HoldTight 102 salt remover and flash rust preventer — is added to water for wet abrasive blasting or pressure washing. From there, the water-based product, which does not contain volatile organic compounds (VOCs), reduces surface tension within the water and works to remove soluble salts, contaminants, and fractured coating and blast media. e product prevents flash rust for up to 72 hours and leaves no residue, according to the company. Meanwhile, CHLOR*RID manufactures a full line of surface decontamination and passivation products, along with a range of salt testing kits. HOLD*BLAST is the compa- ny's liquid salt remover, used to prevent flash rust. e company also offers technical support to assist in the applica- tion of its various products. Grinding Away For some assignments, preparing the surface for the next coatings system may require grinding, scarifying, scraping, or even complete removal of the existing surface. General Equipment Co. is one such specialist. e group's SG12/E single-head surface grinder features a single rotat- ing disc with a 12-inch (30.5 cm) working width. Powered by an enclosed, fan-cooled 1.5-horsepower electric motor, the surface grinder offers a top disc rotation speed of 250 rpm. Applications include grinding concrete surfaces; removing mastics, adhesives, epoxies, and urethanes; breaking up deposits of grease and dirt; removing rubber carpet backing and industrial residues; and polishing more delicate terrazzo and marble floor surfaces. EDCO is another provider in this space. In addition to basic floor grinders, the company produces high-speed turbo grinders for industrial jobs; scarifiers to level, clean, and texturize surfaces; and compressed, air-powered scabbler machines to remove thin layers of concrete from a structure. To address the trend toward more stringent dust regula- tions, most of these machines have built-in dust shrouds and vacuum ports. ese industrial vacuum systems are paired with the surface preparation machines, thus providing an end-to-end solution. "Rental companies are required to supply an appropriate Succeed at Surface Prep Grinders, such as those from General Equipment, aren't just for creating a surface profile on concrete surfaces. They can also be used to remove toppings and polish some floor surfaces. Succeed at Surface Prep continued from page 11

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