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Inhibitive effect by natural Cyperus esculentus L. oil on the corrosion of A356.0-type Al-Si-Mg alloy in simulated seawater environment
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نویسنده
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Mohammed R. A. ,Abdulwahab M. ,Madugu I. A. ,Gaminana J. O. ,Asuke F.
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منبع
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journal of materials and environmental science - 2013 - دوره : 4 - شماره : 1 - صفحه:93 -98
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چکیده
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The effect of cyperus esculentus l. oil as a corrosion inhibitor on the corrosion rate of a356.0-type al-si-mg alloy in simulated seawater environment was investigated using gravimetric method. the corrosion rates were studied in different concentrations of cyperus esculentus l. oil (0.2, 0.4, 0.6, and 0.8 g/v) at temperatures of 30, 50, and 700c. the results revealed that cyperus esculentus l. oil in 3.5% nacl-aluminium environment decreased the corrosion rate at various concentrations considered. results also showed that cyperusesculentus l. oil decreased the corrosion rate of al-si-mg alloy immersion time considered. the minimum inhibition efficiency was obtained at 700c while the maximum inhibition efficiency of 69.97% was achieved with 0.8g/v inhibitor concentration at 300c. cyperus esculentus l. oil acted as an effective corrosion inhibitor for al-si-mg alloy within the temperature and concentration range studied. the results demonstrated that cyperus esculentus l. oil adsorbed on the surface of al-si-mg alloy and obeyed langmuir adsorptionisotherm
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کلیدواژه
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Al-Si-Mg alloy ,gravimetric ,adsorption mechanism ,interface ,thin film
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آدرس
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Ahmadu Bello University, Department of Metallurgical and Materials Engineering, Nigeria, Ahmadu Bello University, Department of Metallurgical and Materials Engineering, Nigeria. Tshwane University of Technology, Department of Chemical and Metallurgical Engineering, South Africa, National Metallurgical Development Centre, Nigeria, Ahmadu Bello University, Department of Metallurgical and Materials Engineering, Nigeria, Ahmadu Bello University, Department of Metallurgical and Materials Engineering, Nigeria
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Authors
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