Corrosion and hydrogen permeation rates were measured at mild steel in hydrogen sulfide saturated alcohols (methanol, ethanol, propanol, ethylene glycol, diethylene glycol, triethylene glycol, glycerol) at 25 °C and ambient pressure. Hydrogen sulfide saturated methanol was also tested at 0 °C, 10 °C and 40 °C. It was found that hydrogen sulfide saturated anhydrous methanol exhibits similar corrosiveness for steel than hydrogen sulfide saturated water. Higher homologues showed decreasing corrosiveness. The diols and glycerols inhibit the hydrogen sulfide corrosion. Filming amines, quats and mercapto compounds were found to be effective inhibitors in hydrogen sulfide saturated methanol. Sulfoxides, sulfides and alkynols yielded only poor effects. Structure-efficiency relationships were rationalized via sulfanophilic/sulfanophobic interactions at the sulfide-covered metal surface.

Subject
Hydrogen sulfide, Alcohols, Water, Hydrogen permeation, Corrosion rate, Metal surfaces, Corrosivity, Solvents, Corrosion inhibitors, Glycol, Steel, Ethylene, Methanol
Keywords:
Hydrogen sulfide, mild steel, alcohols, methanol, ethanol, propanol, ethylene glycol, diethylene glycol, triethylene glycol, glycerol
© 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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