The  study  of  corrosion  inhibition  of  Mild-Steel  in 1.5M HCl  with  Taliniun Triangulare  extract

Abstract

Corrosion inhibition of mild steel in 1.5M hydrochloric acid solution with Talinum Triangulare  (waterleaf) extract was investigated using the weight loss method. It was deduced that the extract from Talinum Triangulare was an effective corrosion inhibitor of mild steel in a hydrochloric acid solution which acted as a corrodent. There was a significant decrease in weight loss of the mild-steel in the corrodent solutions containing mixtures of the leaf extract and 1.5M hydrochloric acid compared to the control corrodent of hydrochloric acid only. This showed that the extract from Talinum Triangulare played a major role in inhibiting the corrosion level of the mild steel by the hydrochloric acid solution.   The finding indicates that Talinum Triangulare acts as an effective corrosion inhibitor for mild steel in hydrochloric acid solution. The effectiveness of the inhibition and surface coverage of mild steel increased with the increasing concentration of hydrochloric acid but reduced as the temperature is lowered. Langmuir adsorption isotherm and Freundlich adsorption isotherm were used to deduce that the adsorption mechanism was physical adsorption. The inhibitive ability of the extract was attributed to the presence of oxygen, nitrogen, and aromatic components in its structure.