A study of a corrosion inhibitor from jackfruit resin extract for carbon steel in hydrochloric acid solution.

Plant-based corrosion inhibitors can reduce electrochemical corrosion and environmental impact. This study evaluates the corrosion inhibition performance of jackfruit resin extract (JRE) for carbon steel in a 1 M HCl environment. The composition analysis of JRE by ATR-FTIR and LC-QTOF-MS showed that this extract contained many polar organic compounds and fatty acids, which act as surfactants facilitating the formation of a protective film on the steel surface. Electrochemical analyses confirmed the formation of a self-assembled protective film with high inhibition efficiency, which decreased with increasing temperature. Based on these analyses, JRE is demonstrated to be a mixed-type inhibitor with high performance at 3000 ppm concentration. Specifically, this extract can effectively achieved of 93.14 ± 0.25% at 25 °C and 83.11 ± 0.58% at 35 °C. Furthermore, surface analysis by SEM/EDS mapping and XPS confirmed that the compounds from the extract adsorbed onto the metal surface to form a uniform protective film. Generally, this study shows that JRE acts as an eco-friendly corrosion inhibitor with high efficiency and shows potential for application in industrial corrosion protection systems.