Abstract

We are reporting a series of chalcone based corrosion inhibitors for mild steel. The compounds were synthesized by grinding azoacetophenone and substituted aromatic aldehyde together in the presence of a base. The compounds were isolated in high purity. The synthesized chalcones' corrosion inhibition activity was studied using weight loss and acidimetric method for mild steel in 1 M hydrochloric acid. The experimental results showed that all corrosion inhibitors' inhibition efficiency increases with an increase in concentration and decreases with an increase in temperature. The good inhibition activity is attributed to the formation of a protective layer on mild steel surfaces. Adsorption of inhibitor on mild steel surface obeyed Langmuir's adsorption isotherm. The mechanical properties of mild steel specimen were also evaluated with Universal Testing Machine (UTM).

Key words: Acidimetry; Chalcone; Corrosion; Corrosion inhibitor; Mild steel; Weight loss