In the abrasive blast preparation of rail equipment, abrasive hardness, sieve size of abrasive, angle of blast, and duration or dwell of blast are fundamental characteristics which can be correlated to profile height under a given set of blast parameters. The nature of an existing coating to be removed however, can shift this relationship.

The relative abrasion resistance between different generic classes of coatings will require different amounts of dwell time to achieve a given degree of cleanliness. Differences in dwell time in turn give rise to differences in profile height for a given abrasive. The removal rate of existing coatings respond differently to abrasive sieve size depending on the coatings relative abrasion resistance. More abrasion resistant coatings respond favorably to a larger sieve size whereas less abrasion resistant coatings respond more favorably to a smaller sieve size.

Subject
Abrasive blasting, Rockwell hardness, Rail, Coating removal, Coatings, Abrasives, Steel, Hardness, Alkyds, Abrasion resistance, Paints, Coating systems, Samples
© 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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