Historical aspects of atmospheric corrosion monitor (ACM) development and the utility of these devices as Time of Wetness (TOW) monitors are reviewed first and the recent advancements in their state of the art are discussed thereafter. Current focus is in evolving the total atmospheric corrosion sensors that would not only monitor and measure the corrosion rates continuously, but measure the variations in corrosion-causing atmospheric parameters as well. Such total devices are projected also to be in-situ and measure the prevalent corrosion rates of the metal directly in the structural member itself. The review also discusses the principles of other possible techniques, other than the commonly adopted electrochemical polarization technique, such as surface acoustic wave spectroscopy (SAWS), electrochemical impedance spectroscopy (EIS), and quartz crystal microbalance (QCMB) analysis and ponders over the future prospects of incorporating these in the total in-situ atmospheric corrosion microsensors.

Subject
Atmospheric corrosion, Time of wetness, Sensors, Materials, Corrosion rate, Metal surfaces, Impedance, Quartz, Corrosion products, Metals, Equipment, Elements, Electrodes
Keywords:
Atmospheric corrosion, time of wetness, atmospheric corrosion monitors, total atmospheric corrosion sensors, total in-situ atmospheric corrosion microsensors, surface acoustic wave spectroscopy, electrochemical impedance, quartz crystal microbalance
© 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)
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