Determination of Optimum Ratio of Selected Carbonaceous Materials on Mechanical and Corrosion Behavior of Carburized Mild Steel
AbstractThis work is centred on the determination of optimum ratio of selected carbonaceous materials of A(40% Snail shell + 40% Animal bone), B(60% Snail shell + 20% Animal Bone), C(20% Snail shell + 60% Animal bone), D(50 Snail shell + 30 Animal bone) and E(30 Snail shell + 50% Animal bone), the mechanical properties and corrosion behaviour of carburized mild steel. Which were carburized at single austenitic temperatures of 1000°C, soaked at single carburizing time of 5hr, at the treatment temperature and samples were then quenched in water. Before the carburization process, standard test specimens were prepared from the received sample for testing hardness, tensile strength, wear, and microstructure analysis. After the carburization process, the test samples are subjected to standard testing to generate data on the ultimate tensile strength and wear rate of the carburized samples. Research shows that the mechanical properties of mild steel are strongly influenced by each of the mixed ratios of the carbonaceous material (Such as Snail shell and Animal Bone). An improved hardness values in all the samples were observed, with sample A having the highest hardness value of 59.05 RHC while sample B and sample C have the highest wear resistance value of 0.090. The samples were immersed in 0.3M H2SO4 solution for potentiodynamic studies. There results show that sample E had the least corrosion rate of 8.1809 mpy hence is less prone to corrosion attack in acidic environment than others. These samples are found to be useful in automobile industry.
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