Performance Evaluation of Palm Kernel Shell as Pitting Corrosion Inhibitor

DOI: 10.14800/IOGR.1336

Abstract

Pitting corrosion is a critical issue in the petroleum industry, leading to substantial economic losses and environmental hazards, such as equipment failures, product contamination, and catastrophic system breakdowns. The conventional reliance on synthetic corrosion inhibitors, while effective, raises concerns regarding their environmental impact and potential health risks. Moreover, the use of imported inhibitors introduces additional cost and logistical challenges. Recent trends have focused on developing sustainable and environmentally benign alternatives derived from locally available materials. This study evaluates the feasibility of palm kernel shell ash (PKSA), an abundant agricultural byproduct, as an eco-friendly corrosion inhibitor for petroleum production equipment. Experimental results demonstrate that PKSA significantly mitigates corrosion rates, offering a cost-effective and environmentally sustainable alternative to traditional inhibitors. X-ray fluorescence (XRF) analysis reveals that PKSA comprises approximately 27 mol% MgO, 14 mol% SiO₂, 29 mol% CaO, 7.72mol% K₂O, and 4.9mol% Al₂O₃, compounds known for their corrosion-inhibiting properties. The inhibition mechanism is attributed to the formation of a protective film on the metal surface, composed of calcium and magnesium compounds, which prevents the penetration of aggressive corrosive agents. Corrosion rate reduction is observed through weight loss measurements, with a gradual decline beginning at around 200^oC, highlighting the potential of PKSA as a viable corrosion control solution for petroleum systems.