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In this work, the inhibitive power of a natural organic compound (the essential oil of clove) on API 5L X60 pipeline steel inan acidic medium (HCl) was studied using the gravimetric technique and electrochemical methods. The results obtainedrevealed that the addition of clove essential oil to the corrosive medium considerably slows down the corrosion process andthat the maximum inhibitory efficiency of 86.97% is obtained for a concentration of 400 ppm in inhibitor.Keywords: Corrosion, inhibitor, API 5L X60 steel, Eessential oil of clove ;