Plated coatings are one of the most extensively applied, yet expensive and deficient methods of protection from corrosion, providing high decorative quality and special properties of parts and constructions used in vessels. The technology of galvanic coating presents a health risk and is an ecologically dangerous process. Thus, the optimization of the coating's thickness to exclude the losses under the use of excessive thickness, and to prevent the necessity to restore the coatings after the covering with understated thicknesses are the vital problems.

It can be successful if accelerated safe investigation methods allowing the determination of the service life of coatings are developed and applied.

A series of investigations were completed on the influence of the sea water aggressivity factors (temperature, humidity, SO2 Cl concentration) on the kinetics and mechanism of the coatings failure. We determined the regularities of the thickness decrease and the formation rate of failed parts of coatings in conditions of the operation.

The results allowed us to work out the optimal regimes of tests for the zinc, cadmium and nickel coatings with coefficient of acceleration for 17 to 21. The mechanism of coating failure existing in conditions of vessel operation is preserved in these tests.

Subject
Zinc rich coatings, Protective coatings, Coatings, Composition, Corrosion rate, Inspection, Corrosion products, Mechanical failure, Steel, Coating service life, Marine vessels, Corrosion protection, Durability
Keywords:
methods of experiments, plated coating, zinc, cadmium, nickel, service life, ships constraction
© 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.