Corrosion inhibition of mild steel by curcuma extract in petroleum refinery wastewater

الملخص EN

The inhibitor property of curcuma longa L.

extract in different concentrations of simulated refinery wastewater (0.05 %-2 % wt) and at various temperatures (30, 35 and 40 ˚C) is investigated using weight loss method.

The results show that the presence of about 1.2 % (v / v) of curcuma extract gives about 84 % inhibition indicating its effectiveness on mild steel corrosion in simulated refinery wastewater, besides the adsorption process on the mild steal surface obeys the Langmuir adsorption isotherm.