A bare metal electrode device that was used to provide a pseudo reference potential was tested under high-temperature and high-pressure conditions. This reference potential was obtained from the polarization curve of the evolution reaction of hydrogen or oxygen. A cyclic voltammetric method was used in the experiments to obtain the polarization curve for the evolution reactions. Experimental results show that the measured potentials of a stainless steel electrode and a stainless steel vessel with respect to the new reference potential were consistent with the values measured against an Ag/AgCl reference electrode. As only bare metal electrodes are required in the reference electrode device, it is robust for applications under high-temperature, high-pressure and high-radiation conditions or in locations difficult to access.

Subject
Bare metal, Hydrogen concentration, Hydrogen evolution, Reference electrodes, Dissolved hydrogen, Potential measurements, Polarization curves, Stainless steel, Electrochemical potential, Electrodes, Corrosion potential, Electrode potential, Hydrogen
Keywords:
reference electrode, reference potential, corrosion potential, electrochemical potential, high temperature solution, high pressure solution, high temperature corrosion, nuclear reactor coolant, radiation field
© 1999 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).
1999
Association for Materials Protection and Performance (AMPP)
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