Combating Pipeline Internal Corrosion Using Jatropha Tanjorensis

Abstract This study explores the corrosion inhibition potential of Jatropha tanjorensis on aluminum (Al), mild steel (MS), and galvanized steel (GA) specimens immersed in a corrosive crude oil medium. Twelve specimens, divided into 4 groups for each metal type, were suspended in the corrosive medium using a unique setup involving plastic containers and wooden sticks. The inhibitor, extracted from 100g of Jatropha tanjorensis leaves in 400ml of ethanol, resulted in a 0.25M concentration solution. The MS, Al, and GA specimens were exposed to a control solution containing 100ml of crude oil with 1M H2SO4. Three concentrations (4ml, 6ml, and 8ml) of the Jatropha tanjorensis extract were added to separate cylinders, and corrosive crude oil with H2SO4 was introduced, following a gravimetric method for weight loss calculations. Results over 120 hours indicated poor inhibitor performance on aluminum, with increasing weight loss. Conversely, galvanized steel and mild steel showed minimal weight loss at all concentrations for the initial 48 hours, with a slight increase thereafter. Notably, the 6ml concentration of inhibitor exhibited the best overall corrosion inhibition and an optimal effectiveness in inhibiting corrosion of galvanized steel by 85.38%, and mild steel by 91.91%. This research contributes insights into combating internal corrosion in pipelines, particularly in the context of the oil and gas industry, and suggests avenues for further studies to refine corrosion inhibition strategies