Corrosion inhibition of mild steel in aqueous salt environments containing CO2 by thioglycolic acid (TGA) was studied using various electrochemical and analytical techniques. The inhibitor performance and its inhibition efficiency at various concentrations and the effect of exposure time and pH of the solution were evaluated. The proposed mechanism of inhibition by TGA considers the complexity of experimental data obtained by various techniques. This mechanism is discussed in terms of adsorption, protective film formation, and especially pH effect and the chemistry of the solution. The probability of local attack caused by TGA is also taken into consideration.

Subject
Circuits, Steel surfaces, Corrosion rate, Protective films, Impedance, Acidity, Corrosion products, Constants, Experimental data, Film formation, Corrosion inhibitors, Corrosion protection, Linear polarization resistance
© 2002 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).
2002
Association for Materials Protection and Performance (AMPP)
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