Department of Metallurgical and Materials Engineering, Ahmadu BelloUniversity Zaria, Nigeria; Department of Mechanical Engineering, University of Abuja, Abuja, Nigeria
Asuke, F., Department of Metallurgical and Materials Engineering, Ahmadu BelloUniversity Zaria, Nigeria; Yaro, S.A., Department of Metallurgical and Materials Engineering, Ahmadu BelloUniversity Zaria, Nigeria; Oloche, O.B., Department of Mechanical Engineering, University of Abuja, Abuja, Nigeria
The corrosion characteristic of Al-5%Si/15%SiC composite in 0.5molar sodium hydroxide solution (caustic soda) using Palm exudate (palm wine) as corrosion inhibitor was investigated employing gravimetric and potential measurements. The research was carried out at a constant time of five (5) hours and varying inhibitor concentrations and temperature in the range of 0.5 - 2.5% v/v and 30 - 70°C respectively. Results obtained revealed that palm wine is a moderate corrosion inhibitor for the composite with optimum concentration of 1.0% v/v, maximum inhibition efficiency of 47.63% was obtained at 30°C at the optimum inhibitor concentration. Thermodynamic parameters such as heat of adsorption, free energy and activation energy were obtained from experimental data. The inhibitor was chemically absorbed unto the surface of the composite. © 2010, INSInet Publication.
