Mass transfer limiting current density (MTLCD) measurements is a convenient way to evaluate surface velocities in highly perturbed environments. The potential of using measurements of mass transfer limiting current density of dissolved oxygen in hydrodynamically turbulent environments was tested on copper cylinders pre-exposed to common corrosive agents. It was found that, following a proper cathodic treatment, such a technique was a reliable way to evaluate surface velocities provided the concentration of dissolved oxygen was known. Additional tests with an orifice cell have permitted to validate the technique for typical testing rig conditions and establish a sound basis for further electrochemical testing of materials. In a reducing environment, other reactions and chemical species could be used to evaluate surface velocities and calibrate testing rig parameters.

Subject
Test methods, Materials, Electrochemical cells, Cylinders, Tubes, Hydrodynamics, Mass transfer, Oxygen, Dissolved oxygen, Copper, Risk reduction, Erosion corrosion, Electrodes
Keywords:
Erosion Corrosion, Surface Velocity, Mass Transfer, Limiting Current Density, Oxygen Reduction
© 1990 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).
1990
Association for Materials Protection and Performance (AMPP)
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