A Comparison between the Effect of Heat Treatment and Plasma on the Wear Activities and Corrosion Resistance of Ni-B Electroless Coating with AISI 4340 Steel

The study the hardness, wear corrosion resistance of as-coating, heat treatment and plasma-nitriding Ni- B electroless coatings was deposit on 4340 steel. After procees coating, samples were in percentage hydrogen/nitrogen ratio (50%), temperature 400°C, at 4 hours compared with treatment. characterization by FESEM, XRD, microhardness, Corrosion Resistance surface roughness measurements. Microhardness show highest hardness 1050 HV obtained for Ni-B formula whereas greatest 800 become sample treated. coating is used enhancement properties AISI steel due to thickness deposition, which uniform, cold act as an active barrier between media metal, it should be noted that value Ecorr less negative rate Icorr lower plated than uncoated sample. decrement deposition time (4h) 400°C. Rate materials depends not just into condition test, but also several material features topography, friction coefficient.