Thermal spraying of zinc as an anode material is an effective means of providing cathodic protection to reinforced concrete. An empirical modeling technique was used to optimize the properties of the zinc coating and make the thermal spray parameterization efficient. The two properties optimized in this study were tensile adhesion strength of the coating, which gives a measure of durability; and deposition efficiency, which is a measure of the process efficiency and, therefore, the process economics.

A novel single wire arc plasma system was used to apply the zinc coatings. The parameters varied were (i) torch to substrate distance, (ii) cooling gas pressure and (iii) arc current. The results of the modeling indicate that the torch to substrate distance and gas pressure exert greater control over tensile adhesion strength and deposition efficiency than arc current.

Subject
Bond strength, Zinc rich coatings, Materials, Cathodic protection, Substrates, Wiring, Adhesive strength, Gas pressure, Plasma, Substrate surfaces, Zinc, Concrete, Thermal spray coatings
Keywords:
thermal spray process, process parameterization, zinc coatings, adhesion strength, cathodic protection, concrete
© 1995 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).
1995
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.