Products Finishing

NOV 2013

Products Finishing magazine is the No. 1 industrial finishing publication in the world. We keep our readers informed about the latest news and trends in plating, painting, powder coating, anodizing, electrocoating, parts cleaning, and pretreatment.

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PAINTING I would opt for a UV-curable coating based on a personal bias. —C.S. A. Thank you for writing to Painting Clinic, C.S. The coatings you suggested are excellent choices. I like UV-curable coatings, too, probably for the same reasons you do, including their ability to be applied and cured on heatsensitive substrates. CLINIC Clean Competitive Filter Phosphate Pretreatment of Galvanized Steel Q. We use a seven-tank process for pretreating cold-rolled steel sheet that has been working fine, but our customer has changed the material to galvanized steel. We are pretreating it using the same seven-tank process, but there are now paint-adhesion failures. What must we do to change the process to pretreat GI sheet? —M.T. A. The following are two possible causes of your problem: 1. The cleaner you are using in your seven-stage pretreatment system is not removing the oil or wax from the surface of the galvanized steel. Oils and waxes are applied to galvanized steel to protect it from white rusting, a coating of unsightly zinc oxide crystals on the surface. 2. You may be using iron phosphate chemicals in your seven-stage pretreatment system. Although you may get light phosphate coating on galvanized steel surfaces using iron phosphate pretreatments, to provide better paint adhesion, it is better to pretreat galvanized steel using zinc phosphate chemicals. Supplying Quality Finishing Systems for 30 Years Dirty Paint Pockets Which filter would you change next? If you chose the dirty one on the bottom, don't feel bad, ® because you probably haven't experienced the Paint Pockets difference. Fact is, the clean, "straight-from-the-box" filter on the top will need to be changed much sooner than the dirty Paint Pockets® filter on the bottom. ® Even after heavy loading, this Paint Pockets filter still has at least twice as much effective filtering life as the clean filter on the top. (By the way, these are actual photos without any fancy retouching.) A better way to calculate filter cost Savvy sprayers know that you have to measure filter life by the number of parts sprayed—not by the square foot. That's ® where Paint Pockets exclusive, patented Diamond Pocket TechnologyTM delivers a clear advantage. Independent tests in ® real-world production environments prove that Paint Pockets outperforms competitors, allowing up to 500% more product to be finished between filter changes. ® Discover why hundreds have switched to Paint Pockets and why you should too. FINISHING SYSTEMS: • PORCELAIN ENAMEL • POWDER COAT • E-COAT • WET SPRAY SERVICES: • SYSTEM AUDITS • SYSTEM UPGRADES • SPARE PARTS Get a FREE set of filters for your spray booth and prove it for yourself! TM ® The KMI mission is to engineer, design and build paint and porcelain enamel fnishing systems at a reasonable cost and within the project schedule. These systems must be reliable, environmentally friendly, require low operating cost and produce high quality fnishes. We achieve customer satisfaction so consistently that our customers insist on becoming repeat customers! With decades of experience, KMI has the knowledge and expertise to meet your needs. KMI, we are in your home. Why not include us in your business? Only Paint Pockets delivers the time and money-saving performance of the patented Diamond Pocket TechnologyTM Paint Pockets C Phone: 815-459-5255 Fax: 815-459-6051 sales@kmisystemsinc.com www.kmisystemsinc.com O M P A N Y TM 877-768-7587 • www.paintpockets.com PRODUCTS FINISHING — pfonline.com 39

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