Corrosion Inhibition of Copper Using African Black Velvet Tamarind (Dialium indium) Extract in Sulphuric Acid Environment

Inhibition of corrosion of copper in aerated 0.5M sulphuric acid solutions containing various concentrations of Dialium indium extract was studied at a temperature range of 30 - 50ºC using weight loss and gasometric techniques. Results showed that Velvet Tamarind concentration range of 0.05 - 0.25g/500ml exhibited a good corrosion inhibition of 71.76%. Generally, it was observed that the rate of inhibition increased with temperature of the corrosive media and concentration of the inhibitor. This shows that Velvet Tamarind is a good, efficient and eco-friendly corrosion inhibitor for copper in 0.5M H2SO4 solution at room temperature and better at higher temperature.