A growing application area is the use of protective coatings to reduce corrosion of stainless steel components exposed to hydrochloric acid (HCl) and sea water. In this presentation discussion will be focused on chemical vapor deposition (CVD) coatings for protection against corrosion caused by HCl and salt environments.

Initial discussion will be on the process of applying CVD coatings. The CVD coatings discussed in this presentation are amorphous silicon coatings developed specifically for stainless steel. Examples will be shown of application of CVD coatings to a wide variety of geometries and steels of varying composition.

The importance of the ruggedness and durability of the CVD coatings will be evaluated. Advantages and disadvantages of CVD coatings to solve corrosion problems versus metallurgical solutions will be discussed.

Data comparing the resistance to corrosion by HCl and sea water of a coated stainless steel surface versus non-coated stainless steel will be given. Discussion will focus on using the CVD coatings for reducing maintenance costs and lowering materials cost by using a coated stainless steel versus expensive high nickel alloys of stainless steel in HCl and salt service.

Subject
Costs, Test methods, Steel surfaces, Coatings, Materials, Photography, Steel coupons, Ferric chloride, Silicon, Steel, Corrosion protection, Stainless steel, Barrier coatings
Keywords:
silicon, chemical vapor deposition, coating, hydrochloric acid, sea water, corrosion, stainless steel
© 2008 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).
2008
Association for Materials Protection and Performance (AMPP)
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