Evaluation of wear and corrosion behaviors of boride and borochromized coatings formed on 316L austenitic stainless steel

Effect of boriding and borochromizing treatments on microhardness, wear properties and corrosion resistance of austenitic low carbon stainless steel (AISI 316L) has been studied. Coating was applied by using of pack cementation method. The pin on disk test was employed at two loads of 75 and 115N to evaluate the wear behavior of the samples. Corrosion test was performed by using of immersion method in (10 vol.%)HCl and (10 vol.%)H2SO4 acid solutions on uncoated, borided and borochromized specimens.The results reveals that specimen with borochromized coating provides higher surface hardness and more desirable wear behavior in respect to uncoated and borided specimens. Fatigue- oxidation wear mechanism is also found as the main deterioration mechanisms of surface layers in coated specimens. Borochromized specimen has Also higher corrosion resistance in comparision with the borided specimen, although, it has, in some extend, similar corrosion behavior to that of the substrate.