Inhibition Efficiency of Extracted Oil from Marble Vine (reflexa hook), Bottle Gourd Seed (largenaria siceraria ) and Melon Seed (citrullucolocynthis) on Substrates in Corrosive Environment

Abstract

This work investigated the possibility of using non-toxic corrosion inhibitors. Corrosion protection is an integral part of industrial development. Effective corrosion inhibitors prolong life of equipment and machinery and minimizes use of natural resources including ore, oil, petroleum, water, etc. Corrosion is both a chemical and electrical process, and is affected by changes in the pH of water. Corrosion inhibitors are generally described by terms such as oil soluble, water soluble, oil soluble-water dispersible, etc. Oil soluble inhibitor partitions between  liquid hydrocarbon phase and water phase. Water-soluble are designed for protection of four different types of metals: steel, iron, copper, brass, and bronze. The water - soluble can also prevent flash rusting. Applications include: lubricating  oil, brake fluid to stop the deterioration of the brake pads and disks; cars cooling system; also used to help protect the engine from rusting and  the structure of cars to avoid deterioration.

In this research, extracted oil from Marble Vine  (reflexa hook), bottle gourd seed (largenaria siceraria ) and melon seed (citrullucolocynthis) were used as inhibitors in different environments (grape juice and sea water) with steel and ductile iron as test specimens, using weight loss and potentiodynamic polarization measurements. The experimental results showed that marble vine oil had the best inhibition performance , followed melon seed oil and combination of melon seed oil with bottle gourd oil in equal proportion. Inhibition efficiency of the combination of marble vine oil and melon seed oil has a high percentage inhibition efficiency of up to 75% at 600 hours of exposure. Their performances depended on inhibitor concentration.