To read this content please select one of the options below:

Corrosion inhibition by N coco‐amine‐2‐proprionic acid on mild steel in CO2 saturated 5 per cent NaCl at pH 6.5

Hassan Malik (Corrosion Engineer, Faculty of Metallurgy and Materials Engineering, GIK Institute of Engineering Sciences and Technology, Topi, District Swabi, NWFP, Pakistan)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 1 December 1999

395

Abstract

Work has been performed to assess the corrosion inhibiting performance of a tertiary amine possessing two carboxylic acid groups (N coco‐amine‐2‐proprionic acid), on initially clean and pre‐corroded mild steel. Using linear polarisation and AC impedance high levels of efficiency were measured within the first hour of inhibitor addition at a concentration level of 10ppm. Simultaneously rapid anodic changes in corrosion potential were observed. With increasing pre‐corrosion decreased efficiencies were obtained, but still greater than 90 per cent, and this coincided with a less rapid alteration in steady state potential. The good response of the inhibitor has been attributed to the adsorption of negatively charged oxygens at the anodic sites on the metal surface, although pitting was detected once testing was terminated. Previously using inhibitors possessing positive charges (short and long chained quarternary amines), under the same environmental conditions, efficiencies > 90 per cent after the first hour were not achieved.

Keywords

Citation

Malik, H. (1999), "Corrosion inhibition by N coco‐amine‐2‐proprionic acid on mild steel in CO2 saturated 5 per cent NaCl at pH 6.5", Anti-Corrosion Methods and Materials, Vol. 46 No. 6, pp. 434-438. https://doi.org/10.1108/00035599910299397

Publisher

:

MCB UP Ltd

Copyright © 1999, MCB UP Limited

Related articles