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Chapter 4- Surface Preparation (eChapter from User's Guide to Powder Coating, Fourth Edition)  Image

Chapter 4- Surface Preparation (eChapter from User's Guide to Powder Coating, Fourth Edition)


Author(s)/Editor(s): Nicholas Liberto PE
Published By:
SME

Published: 02/28/2003
Product ID:
BK03PUB1_E_CH-4
ISBN:
978-1-62104-046-0

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SME Members: $ 8.00
Non members: $ 10.00

Description

The highest quality powder coating will provide excellent results only if pretreatment (cleaning, phosphatizing, and conversion coating) is done correctly and the overall pretreatment system is maintained up to its potential. In powder coating, the pretreatment basics of cleaning, rinsing, phosphatizing, and seal rinsing are slightly more critical than their importance in liquid-coating systems. Considering all of the key elements involved in producing high quality, powder-coated products, cleaning is the single most important to maximizing powder-coating results. Mechanical methods of cleaning can be generally applied to all types of surfaces since they involve abrasion of surfaces by scrubbing, sanding, grinding, tumbling, or vibrating with abrasive media and wet (slurry) or dry abrasive blasting. Most surfaces that are powder coated after cleaning are either galvanized steel, steel, or aluminum.