Corrosion Inhibition of Mild Steel by Anogeissus Leiocarpa Root Extract Using Hexane in Acidic Medium

The menace caused by corrosion on mild steel and on the economy of any nation cannot be overlooked. If not checked will result in damning consequence. As a result there has been several researches tailored in this regard, controlling corrosion by using inorganic inhibitors. However, these inorganic inhibitors are not environmentally friendly. Organic inhibitors (of plant origin) appears to be good alternative due to the presence of phytochemicals and it’s readily available. One of such plants is the hexane root extract of Anogeiossus Leiocarpus (Africa birch). The method used is weight loss at 303k, 313k, 323k and 333k. The concentration of root extract used on mild steel are 0.7, 0.8, 0.9 and 1.0 grams. The results show the highest inhibition efficiency of 81 % for 1.0 g/l and 21 % for 0.7 g/l in 1M H2SO4 at 303k. This result implies that with increase of inhibitor, both surface coverage and inhibition efficiency increases but with decrease in corrosion rate. It was also observed that increase in temperature, there is reduction in inhibition efficiency. At 333k, IE % for 0.1 g/l is 51 % and 0.7 g/l is 13 %. For each temperature, it was also observed that with time increase, there is progressive decrease in weight loss and corrosion rate but increase in both surface coverage and IE %. The data derived from this research confirmed the fact that corrosion inhibition mechanism was affected by the root extracts