Cadmium coatings have been widely used to protect ferrous substrate, mainly fasteners, against corrosion. In spite of presenting excellent properties, such as lubricity, low voluminous corrosion products, high performance and compatible cost, cadmium presents high toxicity. For this reason worldwide researchers are engaged to find replacers for cadmium coating. With this purpose, a project to identify cadmium coating replacers was conducted. In a previous way of this project, a wide bibliographical research was done in order to identify the potential replacers of cadmium available in the national and international market. Eleven coatings obtained through different application processes, including zinc alloy coatings, organometallic coatings and other trademark coatings were identified. This work presents the main results of the atmospheric corrosion tests conducted with and without intermittent spraying of a salt solution (Scab Test) for the twelve coatings (identified replacers and cadmium coating itself).

Subject
Accelerated corrosion tests, Zinc nickel coatings, Coating performance, Zinc rich coatings, Cathodic protection, Aluminum spraying, Materials performance, Aluminum, Spray coating, Corrosion products, Epoxy coatings, Carbon steel, Corrosion resistance
Keywords:
cadmium, corrosion protection, fastener, offshore, organometallic coating, metallic coating, marine corrosion
© 2012 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).
2012
Association for Materials Protection and Performance (AMPP)
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