Browsing by Author "Lawal, Abdulquadir"

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    IMPACTS OF COVID-19 PANDEMIC ON NIGERIA’S ECONOMY: EFFECTIVE FOUNDRY TECHNOLOGY AS A SUSTAINABLE SOLUTION
    (UNIVERSITY OF GALATI, 2022) Yusuf Lanre, Shuaib-Babata; Yusuf, Busari; Rasheedat, Mahamood; Salihu, Yaru; Lawal, Abdulquadir; Ibrahim Owolabi, Ambali; Kabiru Suleiman, Ajao; Sikiru, Abdulraman
    This study considered the effect of the Covid-19 pandemic on the economy of Nigeria and investigated the effective application of foundry technology to proffer a sustainable solution to the problem. Domestication of production of motorcycle components, being a significant means of transportation that is required for the development of any society was considered. Aluminium scraps from a waste dump and Belle and Oyun natural moulding sands in Kwara State, Nigeria, which have been previously recommended for non-ferrous casting in previous studies were considered and used for casting of motorcycle/tricycle parts (centre stand and brake pedal) using AFS guidelines. The scraps’ chemical compositions were analysed. Thereafter, some mechanical properties with the microstructure of the aluminium casts and that of commercially obtained imported types were examined using appropriate ASTM standards. Cast aluminium alloy produced using scrap had no casting defects and had some mechanical properties comparable to those available on the markets (imported). Thus, effective usage of naturally available moulding sands in Nigeria for foundry applications would help to proffer sustainable solutions to the nation’s economic problem as a result of the adverse effects of the Covid-19 pandemic.
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    MODELLING OF CORROSION INHIBITION OF CUCUMBER PLANT EXTRACTS ON AISI 1007 STEEL IN SEA WATER
    (UNIVERSITY OF GALATI, 2022) Yusuf Lanre, Shuaib-Babata; Hassan Kobe, Ibrahim; Yusuf, Busari; Rasheedat, Mahamood; Sikiru, Abdulraman; Ibrahim Owolabi, Ambali; Lawal, Abdulquadir; Ishaq, Aremu; Kabiru Suleiman, Ajao; Samuel, Ejiko
    Adsorption Models with the application of corrosion experimental data is a very popular mechanism to predict various inhibitive systems. The effective modelling and interpretation of adsorption isotherms reliably determine the level of accuracy of adsorption processes. This study aims to apply the adsorption models and inhibitive mechanism of Cucumber Peel Extract (CPE) and Cucumber Seed Oil (CSO) to corrosion of AISI 1007 steel grade in the saline medium using both the electrochemical (Tafel Polarisation) and non-electrochemical (Weight Loss) techniques. The chemical composition of AISI 1007 and the phytochemical properties of studied extracts were determined. Consideration was given to Langmuir and Dubinin-Radushkevich Isotherm models (D-RIM) to study the inhibitive properties of CPE and CSO on AISI 1007 steel in an aggressive medium. The result of inhibition efficiency from weight loss measurement showed maximum inhibitions of 94.44 % and 95.44 % with 1.0 g/L concentration of CPE and CSO respectively in sea water medium. The result of the studied extract at 25 ℃ in seawater showed that the corrosion current density of AISI 1007 steel decreased and increased in the inhibition efficiency with 87.33% and 94.67% for CPE and CSO respectively. The negative value of ΔGads was greater than 20 kJ/mol and was obtained as a result of electrostatic interaction between the adsorbed inhibitor molecules and the ions/atoms on the metal surface. The studied inhibitors were confirmed to be mixed organic corrosion inhibitors type. The values of E and maximum surface coverage (θmax) for the two measurements are satisfactorily in acceptable agreement as similar to the range of value obtained for inhibition efficiency.