The corrosion rate of AISI 1018 carbon steel was measured over a range of temperatures, CO2 partial pressures, flow rates, and solution chemistry under turbulent pipe flow conditions. The combined effects of CO2 partial pressure, ionic strength, temperature, and initial bicarbonate ion concentration, i.e., solution chemistry, may be described by a single variable, pH. The effects of flow can be combined with pH to form a new variable, hydrogen ion flux, to describe the overall effect of solution chemistry and flow on the sweet corrosion of a film free carbon steel surface. Sweet corrosion rates are directly proportional to hydrogen ion flux over a wide range of temperatures and solution pH’s. Finally, the separate effects of dissolved iron and chloride ion concentration are described.

Subject
Piping, Fluxes, Ions, Corrosion rate, Wall shear stress, Bicarbonates, Mass transfer, Sodium chloride solution, Ion concentrations, Fluids, Carbon dioxide, Carbon steel, Hydrogen
Keywords:
solution chemistry, pH, CO2 corrosion, wall shear stress, mass transfer, hydrogen ion flux
© 1995 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).
1995
Association for Materials Protection and Performance (AMPP)
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