Corrosion Inhibition Behaviour of Enantia chlorantha Extract on Pipeline Steel Corrosion in Acidic System

Abstract

The corrosion inhibition capacity of Enantia chlorantha bark (ECB) extract on the corrosion of pipeline steel in an acidic environment was studied using the gravimetric method. The result revealed that weight loss obviously increased with the rise in temperature though trend lines were not parallel. The results obtained from the evaluation showed that the corrosion inhibition efficiency of the extract increased with extract concentration
attaining an efficiency of 89.02% with 2.5 g/L concentration at 30 ºC. The corrosion inhibition efficiency, however, decreased with increase in temperature, while the corrosion rate decreased. The significant achievement in this study was the ability of Enantia chlorantha extract to reduce the corrosion rate constant, increase its surface coverage with consequent longer material half-life in an acidic environment.

Keywords: Inhibition efficiency, surface coverage, plant extract, weight loss, half-life