SuperCorona®

SuperCorona®

SuperCorona®

Product catalog summary
Introduction to SuperCorona Technology
The SuperCorona technology is designed to enhance the quality of powder coatings, particularly in applications requiring thicker coatings and high optical quality. It is suitable for coating profiles, wheels, fences, radiators, drawers, and textural powder applications, ensuring a balanced pattern.
Benefits of SuperCorona
The SuperCorona-head-piece, which can be retrofitted, utilizes a low-ionic charge to improve coating quality. This technology is particularly effective in reducing the "orange peel effect," a common issue in powder coating processes.
Understanding the "Orange Peel Effect"
The "orange peel effect" occurs due to the corona charging principle, where a large number of electrons are emitted at high voltage. Most electrons do not impact powder particles and become free ions, which settle on grounded objects. When the workpiece is coated, these ions create an induction charge, leading to an uneven powder layer. The SuperCorona technology mitigates this effect by reducing free air ions.
Contact Information
Gema Switzerland GmbH, Mövenstrasse 17, 9015 St.Gallen, Switzerland. Phone: +41 71 313 83 00, Fax: +41 71 313 83 83, Website: www.gemapowdercoating.com
Disclaimer
Gema Switzerland reserves the right to make technical changes without notice.
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Catalog excerpts

SuperCorona®-1

SuperCorona® The benefits of the SuperCorona The low-ionic charge with the retrofittable SuperCorona-head-piece is used in all cases, where thicker coatings and a high optical coating quality is required. Typical areas of use of the SuperCorona are the coating of profiles, wheels, fences, radiators and drawers. A further area of use is the coating with textural powder, where the SuperCorona leads to substantially balanced pattern. OptiGun with SuperCorona OptiSelect with SuperCorona Your global partner for high quality powder coating

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SuperCorona®-2

Why does “orange peel effect” occur? The corona charging principle ejects a large number of electrons with high voltage at the tip of the electrode. The powder is charged negatively and reaches the work piece with the help of the air stream. But 90 to 99% of the emitted electrons do not impact any powder particles and enter the booth space as free ions. These travel at high velocity toward the nearest grounded object (work piece, gun holder, metal booth wall) and settle there. On blank, uncoated metal the ions dissipate immediately via the ground connection. But as soon as the work piece is covered...

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