Eco-friendly corrosion inhibitor from Pennisetum purpureum biomass and synergistic intensifiers for mild steel

doi:10.1016/j.cjche.2016.04.028

摘要/Abstract

摘要： Extracts of elephant grass (Pennisetum purpureum) blended with some intensifier halides like ammonium chloride (AMC) and potassiumiodide (PTI) were investigated as corrosion inhibitor formild steel. The corrosion processwasmonitored in 3.5% HCl bymass loss and electrochemical techniques at 30, 40, 50, 60 and 90℃. Addition of AMC and PTI increased the inhibition efficiencywith the highest inhibition efficiency obtainedwith PTI blended extract. The blends behaved as mixed type inhibitors and were spontaneously adsorbed onmild steel surface in exothermic nature. Synergistic parameters of the intensifier ions revealed cooperative effect. Kinetic data treatment indicated increase in energy barrier by intensifier ions. The results demonstrate that elephant grass extract blended with halide ions can act as alternative ecofriendly inhibitor for mild steel at elevated temperatures.

关键词: Adsorption, Charge transfer resistance, Corrosion inhibitor formulations, Electrochemical techniques, Elephant grass

Abstract: Extracts of elephant grass (Pennisetum purpureum) blended with some intensifier halides like ammonium chloride (AMC) and potassiumiodide (PTI) were investigated as corrosion inhibitor formild steel. The corrosion processwasmonitored in 3.5% HCl bymass loss and electrochemical techniques at 30, 40, 50, 60 and 90℃. Addition of AMC and PTI increased the inhibition efficiencywith the highest inhibition efficiency obtainedwith PTI blended extract. The blends behaved as mixed type inhibitors and were spontaneously adsorbed onmild steel surface in exothermic nature. Synergistic parameters of the intensifier ions revealed cooperative effect. Kinetic data treatment indicated increase in energy barrier by intensifier ions. The results demonstrate that elephant grass extract blended with halide ions can act as alternative ecofriendly inhibitor for mild steel at elevated temperatures.

Key words: Adsorption, Charge transfer resistance, Corrosion inhibitor formulations, Electrochemical techniques, Elephant grass

Ekemini Ituen, Abosede James, Onyewuchi Akaranta, Shuangqin Sun. Eco-friendly corrosion inhibitor from Pennisetum purpureum biomass and synergistic intensifiers for mild steel[J]. , 2016, 24(10): 1442-1447.

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