Inhibition of Mild Steel Corrosion using Binary Mixture of Sesame and Castor Oil

Mild steel is utilized as a prominent metal in the construction of equipment’s such as pipes and storage tanks in the oil and gas industry. It is vulnerable to a high rate of corrosion attack which has led to great losses and damages in the industry. The effect of corrosion attack on mild steel have continued to create a global interest on a means of controlling it. Different research have reported different ways of preventing corrosion, one of which involves the application of inhibitors on these structures. Previous research works have demonstrate the use of corrosion inhibitors as an effective means of reducing corrosion rate. This research study was to explore the efficiency of the binary mixture of castor and sesame oil as an organic corrosion inhibitor at different concentration of brine, volume of binary inhibitor and time. Minitab 17 was used as an optimization tool for the experimental procedure. The highest corrosion rate of 42.20 mm/yr was observed at 0.7 M brine solution, 19 mL volume of the binary inhibitor, over a period of 21 days. The lowest corrosion rate (3.01 mm/yr) was observed at 0.7 M brine solution, 23 ml of binary inhibitor and at 13 days. The results shows that the binary mixture of both castor and sesame oil is an effective and efficient organic inhibitor used in controlling corrosion.