A new powder bed coating process has been developed to provide a highly adhesive, low-cost coating of saturated polyester on galvanized articles. The key point of this new process is to melt the resin powder applied to the galvanized article surface using the heat remaining in the article after it is removed from the molten zinc bath. In this process, resin powder is applied to the galvanized article immediately after it has been hot plated. Thus, this new process does not require the special heating procedure which is indispensable for the conventional powder bed coating process. This prevents surface oxidation caused by long heating time and resulting adehesiveness reduction of the coating film on the surface of the galvanized article. The treatment cost is also largely reduced since a special heating apparatus is unnecessary.

Subject
Films, Coating removal, Zinc rich coatings, Steel surfaces, Protective coatings, Coatings, Galvanized coatings, Cables, Powder coatings, Powders, Polyester coatings, Zinc, Polyester
Keywords:
Powder bed coating, Saturated Polyester, Protection, Galvanized Steel, Cable Coduit, Telephon pole, Organic coating
© 1991 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1991
Association for Materials Protection and Performance (AMPP)
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