Titanium-based coatings of three kinds are discussed: pure titanium and titanium alloy compositions cathodic to steel, titanium compound coatings and cermet composite coatings containing titanium compounds and aluminum, and titanium alloy compositions that would be anodic to steels. Merits and economics of titanium coatings are considered. Coating methods are discussed, of which ion implantation, cementation, and chemical vapor deposition could be used to develop undercoats of titanium compositions over which thicker coatings can be applied by plasma spraying or by other means. Past results are reviewed and results from author's work are reported. Salient discussions include the results of the author obtained in Ti-Al and Ti-Al-Zn alloys, wherein phases that are anodic to steels have been discovered. Characteristics of TiN, TiC, TiN-Al, as well as of Ti2Fe coatings on steels in salt waters are described. Several directions for new developments in the coatings area and the possible uses of Ti-coatings in marine environment are considered.

Subject
Zinc rich coatings, Water, Coatings, Composition, Salts, Tin, Spray coating, Steel, Titanium, Corrosion resistance, Zinc, Titanium alloys, Corrosion potential
© 1981 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).
1981
Association for Materials Protection and Performance (AMPP)
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