International Science and Technology Journal

This study aims to propose an analysis to improve wear and corrosion resistance of carbon steel by hot dip aluminizing coating. It investigates the effect of varying dip times at different diffusion temperatures on the microstructure and micro-hardness of aluminized and diffused specimens. The results show that a higher diffusion temperature yields porous surface and lower dip time showed a thin layer of case depth. Aluminized and diffused studies have confirmed the presence of aluminides in the surface layer, which could be instrumental in the significant increase in surface hardness. This could be used for components in automotive and other engineering applications. Wear resistance is considered critical. To achieve these variables, the aluminum layer coat was produced by different immersion aluminizing temperature (700, 750, 800 and 850 °C) and time (15, 30, 45, 60, 90 and 120 sec) visual inspection (visual appearance), coating thickness measurement, coating hardness, and degree of roughness, and aluminized low carbon steel. The results of appearance showed many defects on the surfaces in condition (700, 750 °C and aluminizing time 15, 30 and 45 second) respectively, while good appearance was noted in condition at aluminizing temperatures 850 °C and aluminizing time 90 &120 seconds, respectively. Coating thickness and coating hardness were increased with an increased aluminizing temperature and time. It has also been noted that the aluminizing temperature is more effective than aluminizing time. The immersion speed is respected: while fast immersion product pulped on the surface, slow drawing shows homogeneity surface coating.