An Investigation of Tribology Conduct of Alumina Coating on Austenitic Steel

The increasing importance of developments in mechanical industry requires a constant evolution of skills particularly in the area of functionalization and protection of metal surfaces. In this work, 500 micron thick Al2O3coating were deposited on substrate made of austenitic steel AISI 316 by thermal spray coating. For the protection against oxidation, Al2O3which has an excellent ability to hinder the inward diffusion of oxygen is desired. Especially above 1000o C Al2O3 become the most effective oxide against environmental attacks. In the experimental testing the Rockwell hardness of AISI 316 coated with Al2O3 is found out to be 27.83 HRC and in the salt spray test we noticed that the red rust formation is not found after 12 hours for the coated specimen and the red rust formation is found after 12 hours for the uncoated specimen.