Rust is caused by the influence of water, oxygen and time. Air pollution and contaminants on steel surfaces speed up the corrosion process.

When corrosion is caused by condensation water, a micro-porous coating can considerably enhance traditional corrosion protection. in 4 distinct ways:

  1. It delays the forming of condensation on the surface

  2. It absorbs the condensation into the micro-pores during heavy condensation periods, spreads it in the porous matrix and makes it evaporate at a much faster speed than from a smooth surface. Thus it reduces the time corrosive contaminants are in contact with the surface.

  3. It is anti-static and does not attract the various substances that air pollution consists of.

  4. It reveals imperfections of the rust protection.

The micro-porous coat is consequently both reducing the corrosion activity time and minimizing the amount of aggressive substances contained in condensation that speed up the corrosion process.

Laboratory tests as well as full scale objects show that the life span of a traditional corrosion protection will be two to three times longer with a topcoat of a micro porous material than without one. In addition the micro-pore coat acts as an early warning system in case of defective or damaged corrosion protection.

Subject
Steel surfaces, Protective coatings, Water, Materials, Top coats, Condensation, Condensates, Vapors, Rust, Dew point, Corrosion protection, Blistering, Paints
© 2008 Association for Materials Protection and Performance (AMPP). All rights reserved. This work is protected by both domestic and international copyright laws. 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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