Corrosion Inhibition Efficacy of Cninodosculus chayamansa Extracts on Aluminum Metal in Acidic and Alkaline Media

Abstract

The corrosion behavior of extracts of Cninodosculus chayamansa(CC) on aluminum in 0.5 M NaOH and 1 M HCl was investigated using gravimetric technique. The effects of temperature, concentration and the addition of KI on the inhibition performance of the extracts were assessed. The experimental findings revealed that the extracts of CC inhibited corrosion reaction in both the acidic and alkaline environments with the effect becoming more vivid as the CC extract concentration increased, weight loss increased as temperature increased. The addition of KI to the extracts of CC significantly reduced the rate of corrosion in the alkaline environment and slightly in the acidic environment. Experimental data was seen to fit the Langmuir isotherm, this revealed that the organic constituents of the extracts chemically adsorbed on the metal/surface interface.