Linear polarization studies of the corrosion inhibition of aluminium using leaves extract of Alcalypha wilkesiana

Abstract

An electrochemical investigation was conducted to evaluate the corrosion behavior of Aluminum in 1M Hydrochloric acid medium. Corrosion currents were determined using the linear polarization technique. Tafel slopes, βa and βc were also determined by Tafel polarization measurements. The effect of Extracts of Alcalypha wilkesiana on the Aluminum corrosion behavior was observed in electrolyte solutions at room temperature. The results showed a lower corrosion rate (CR) in the Alcalypha wilkesiana solution (AS), having a CR of 14.26 mm/yr against that of the blank solution (BS) with a CR of 22.61 mm/yr. The calculated inhibition efficiency was 37 %.