Browsing by Author "Busari, Yusuf O."
Now showing 1 - 3 of 3
Results Per Page
Sort Options
Item Design and Fabrication of Electric Muffle Furnace(Civil Engineering Department, University of Ilorin, 2018) Ahmed, Ismaila Idowu; Adebisi, Jeleel Adekunle; Busari, Yusuf O.; Ogunbiyi, I. B.; Gbadebo, A. O.; Adeko, A.; Omowumi, A.; Olanrewaju, S. O.; Abdulkareem, SulaimanThis work was aimed at the design and fabrication of heat treatment furnace, with automatic control system, using locally sourced materials. Computer- Aided Design (CAD) and Autodesk Inventor Professional were used for the structural design. And, consistent with materials selection procedures, mild steel was selected for the fabrication of casing, while other appropriate materials for the construction were selected based on service need using their relevant properties, cost considerations and ease of fabrication into the various component parts. The International Electric Equipment (IEE) regulation (BS 7671) was also followed in electrical and electronic components design to ensure compliance with the international standard. Performance evaluation of the muffle furnace showed a maximum attainable temperature of 920°C inside the enclosed heating chamber after a period of 15 minutes of continuous heating. This showed that, the furnace is suitable for all forms of heat treatment and melting of both ferrous and non-ferrous metals within the maximum attainable temperature. The maximum operating temperature of 650°C was therefore advised to ensure health and safety and extended operation life of the heating element.Item Effect of Heat Input on the Mechanical and Corrosion Behaviour of Smaw Mild Steel(University of Novi Sad, Serbia, 2017-11-29) Busari, Yusuf O.; Ahmed, Ismaila Idowu; Shuaib-Babata, Yusuf LanreThis study was carried out to assess the effect of heat input on the mechanical properties and corrosion behaviour of mild steel. The intrinsic nature of fusion welding has made it difficult to provide a complete understanding of corrosion behaviour in some systems. Optical metallography was used to determine grain size and HAZ zone, weldment and parent metal. Mechanical properties of the weldment were observed. Corrosion behaviour of mild steel were investigated in air, sea water, alkaline and acidic medium after welding with shielded metal Arc welding SMAW by varying the welding process parameter that leads to power input and monitoring its welding speed with a stop watch. The microstructural characterization of the welded sample carried out through a metallurgical microscope (x100) and the corrosion response rate by weight loss was observed in the different medium, the sample welded with 180A and low voltage displayed the highest Rockwell hardness and the same was observed for impact test. The effect of various heat inputs on the corrosion behaviour of shielded metal arc welded mild steel show thus the as-received sample have the greatest resistance to corrosion in all the medium, at 180 A, high voltage this is closely followed by sample welded with 180 A, low voltage. The sample welded with 90A, low voltage which has the least corrosion resistance in all medium during the exposure period studied. The low heat input welded samples underwent a long period of heating, low heat input could lead to a greater tendency of distortion which may produce a higher weld cracking in the aggressive corrosion medium. The higher the current, the higher the power input and the deeper the penetration. However, the use of too high weld current may cause problems such as excessive spatter, electrode overheating and cracking while too high weld voltage could cause the beads to be wider and flatter. The low arc voltage produces a stiffer arc that improves penetration. If the voltage is too low, a very narrow bead will result.Item Inhibitive Potentials of Bitter Kola Stem (BKS) on Mild Steel in Acidic Media(2017) Adediran, Adeolu Adesoji; Olawale, Olamide; Talabi, Segun Isaac; Busari, Yusuf O.This paper deals with the inhibitive potentials of bitter kola stem extract (BKS) on the deterioration of mild steel in 1 M HCl and 1 M H2SO4 using gravimetric method. Coupons of dimension 5.0 cm x 4.0 cm were immersed in test solutions of uninhibited acid and also in those containing various amount of BKS (10, 25 and 40 %v/v) at 30 oC and 60 oC respectively. The results showed that the extract addition reduced mild steel corrosion in the acidic media. The inhibitive efficiency of 92.07 % was attained at 40 %v/v in 1 M H2SO4 at 30 oC temperature, while the efficiency of 89.19 % was realized at the same concentration in 1 M HCl at 60 oC temperature. Hence, BKS can be considered as a good and safe inhibitor against mild steel corrosion in both acidic media.