This paper describes the range of variables encountered in nominally similar jar test methods for inhibitors of BaSO4 and SrSO4, the results of investigations into their effects on the repeatability and reproducibility of the tests, and the extent to which they may have an effect on the ranking of inhibitor performance. A Preferred Test Procedure was developed, and this is described, together with the results of a Round Robin test, carried out by the participants. The results of this study show that good repeatability and reproducibility can be achieved by controlling the many test variables in an improved test procedure that should be acceptable to manufacturers, service companies and end users.

Subject
Acids, Test methods, Water, Inhibitor performance, Composition, Scale inhibitors, Acidity, Incubation, Salinity, Corrosion inhibitors, Mixing, Brines, Samples
Keywords:
scale inhibitors, barium sulphate, strontium sulphate, jar test, testing technique, temperature, brine composition, pH, buffers, test duration
© 1992 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).
1992
Association for Materials Protection and Performance (AMPP)
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