CoatingsPro Magazine Supplements

STEEL 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.

Issue link: https://coatingspromag.epubxp.com/i/1097656

Contents of this Issue

Navigation

Page 13 of 27

14 STEEL SURFACES 2019 COATINGSPROMAG.COM Minerals believes copper slag is making inroads. "It is a heavier product that can provide higher performance level when needed and still be 'dialed down' by using finer gradations," said Jason Vukas, vice president of sales and marketing. Another media choice is garnet abrasives, supplied by companies such as GMA Garnet, Chemours, and BARTON. Garnet can provide a clean surface finish with a uniform profile that is virtually free of particle embedment. According to BARTON, garnet contains very low levels of chlorides and other salts and has been rigorously tested to conform to the U.S. Occupational Safety and Health Administration's (OSHA) enhanced standard for respirable crystalline silica. "e critical factors that determine successful blasting for surface preparation are the magnitude and consistency of the resulting anchor pattern; surface cleanliness; low levels of salts, which can lead to premature coatings failures; and low dust levels," said Joe Morris, national sales manager at BARTON. "Garnet is heavier and harder than other comparable minerals abrasives. Because of this, garnet produces lower levels of dust and increases productivity, all while using less abrasive." Kleen Blast is a separate provider that offers not only various blasting media but also equipment and accessories. Depending on the application, additional precau- tions may need to be taken with blast media. "W hen blast- ing a tank, all you're looking to control is dust and debris from flying onto adjacent private property," said Sherwin- Williams' Morris. "Many of these are in rural America, so it may not be as big of a factor unless there's lead-based paint." On the other hand, Morris stated that bridges typically need a containment apparatus to keep product off vehicular traffic in adjacent lanes, waterways, and other environments. No matter the preparation or profile, it is crucial for contractors to remain aware of their environment. "I've worked with specifiers that aren't always fully aware of the realities of some of the standards," said Induron's Rowland. "One of the standards, such as a white metal blast cleaning, is very difficult to obtain and maintain prior to application of the coating. Maintaining this level of cleanliness is often not realistic outside of a shop environment. When such standards are implemented, we're able to use primers, such as Induron's CeramaPrime, that offer ease of application and quick through- put, due to its fast cure and recoat times. It's necessary to know what's realistic in the shop and field so that we're helping to write specifications most conducive to the work at hand." Handheld Options For tighter locations when larger blasting equipment may not be logistically feasible, smaller hand tools can do the trick. e Model 18 Needlegun from DESCO Manufacturing, which is available with dust-shrouding for applications needing containment, operates as a hand-held scaler with extended reach. e company also offers scarifiers such as its Mini-Flushplate with multiple interchangeable abrasive heads, along with grinders, sanders, and industrial vacuums. "One size does not fit all, and sand blasting is not the most cost-effective method of preparing a surface in all cases," said Ralph Fabian, CEO of DESCO. "For smaller spot repairs, it can be much more cost effective to attack the problem with a power tool than breaking out a blast machine. If lead, chrome, or other hazardous materials are present, the scale leans that much more in favor of vacuum-assisted power tools when factoring in the costs of building containment and disposing of contaminated blast media." Fabian noted that for projects in environments where operations cannot be shut down, such as power plants or ships, blasting operations and associated dust may be untenable. Another handheld option is the Bristle Blaster line from Montipower, Inc., which utilizes rotating wire bristle Steely Resolve continued from page 11 When picking a blast media, according to U.S. Minerals, you should consider what material is being removed, the desired surface finish and profile, the budget/cost of the blasting media, and the availability of supply. Exceptional areas, such as power plants and wind turbines, may require special tools to get the job done, such as DESCO Manufacturing's Needlegun. The industry also offers wire rotating brushes for these areas. Steely Resolve

Articles in this issue

Links on this page

Archives of this issue

view archives of CoatingsPro Magazine Supplements - STEEL 2019