Sensor technology, particularly that based on microelectronic fabrication methods, can measure properties of condensates in real time and can increase the quantity and quality of information gathered from accelerated testing in the laboratory. The objective of these studies is to develop a series of electrochemical corrosion sensors to measure the corrosivity of condensates formed within heat exchangers and vents of gas furnaces. Corrosion sensors have been developed to measure several corrosion parameters such as pH, time-of-wetness, and temperature. Measurements have been made on a series of simulated and real condensates ranging from aggressive to benign corrosivity. Subsequent testing of the sensors was performed at the American Gas Association Laboratories on gas fired appliances. Data is presented from these tests and related to the corrosion behavior of the heat exchangers. Prototype systems were developed and tested for each type of sensor.

Subject
Acids, Sensors, Moisture, Laboratory data, Probes, Walls, Condensation, Condensates, Flue gas, Acidity, Furnaces, Heat exchangers, Electrodes
Keywords:
sensors, pH, microelectrodes, gas appliances, gas furnaces
© 1994 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).
1994
Association for Materials Protection and Performance (AMPP)
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