An electrochemically-based technique, which uses assessment of the oxygen reduction reaction at a Rotating Disk Electrode (RDE), has been devised which shows promise as a method for studying nucleation and growth of scale at a solid surface. In this paper results are presented which illustrate the good correlation between the surface coverage predicted by electrochemical analysis and the actual coverage quantified by image analysis. Preliminary results in the presence of 1 ppm polyacrylic acid inhibitor have indicated that, in inhibited solution, the new technique is valid for prediction of surface coverage. The potential of this technique for mechanistic studies of surface scaling and for assessment of inhibitors is discussed.

Subject
Electric current, Acid inhibitors, Steel surfaces, Precipitation (solids), Diffusion, Surfaces, Surface analysis, Scale formation, Corrosion inhibitors, Scale, Oxygen, Electrodes, Scaling
Keywords:
scaling, carbonate, electrochemical, inhibitors, deposition, cathodic, RDE
© 1998 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).
1998
Association for Materials Protection and Performance (AMPP)
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