Development of Environmental Friendly Inhibitor for Corrosion Prevention of Mild Steel in Aerated Drinking Water system

Drinking water supply system is facing severe problems due to corrosion of iron pipes. The factors that affect pipeline corrosion include water composition, flow conditions and biological activity. The inhibitive effect of murraya koenigii leaf (curry leaf) extract on the corrosion of mild steel in drinking water was studied using weight loss, open circuit potential measurements and potentiodynamic polarization techniques. The results show that murraya koenigii leaf extract is effective in inhibiting corrosion of mild steel in drinking water system. As the concentration of the inhibitor in the medium increases, the inhibition efficiency increases. The percentage inhibitor efficiency calculated based on weight loss method is found to be above 95% when the medium contains 400ppm of inhibitor. The presence of murraya koenigii leaf (curry leaf) extract in drinking water improves the quality of water in addition to prevent the corrosion of iron pipes.