Performance evaluation of a natural and synthetic compound as corrosion inhibitors of API 5l X52 steel in hydrochloric acid media
Abstract
A comparative study of corrosion protection of pipeline steel API 5L X52 in hydrochloric acid solution was conducted between a synthetic commercial corrosion inhibitor and a green corrosion inhibitor extract from the leaves of Ruta Chalepensis (LERC). It has been found that LERC inhibiting ability is quite high and depends strongly on its concentration in the corrosive solution. At an elevated temperature (353K), the LERC inhibitor demonstrates higher effectiveness than the commercial inhibitor. The electrochemical study showed that the LERC inhibitor affects both the anodic and cathodic corrosion reactions. The LERC adsorption mechanism on steel surface was assessed and some thermodynamic parameters of its process were determined.