Improve Wear Resistance by Nano Composite Electro Less Coating for Low Alloy Steel (Ni-P-Graphene)

Abstract

Several experiments were carried out for the electroless coating process , Sodium hypophosphate with (10 , 14 and 24)g/l were added to achieve low , medium and high phosphorous in electro less coating for low alloy steel , the coating time (45 ,75 and 105)min and use different heat treatment temperatures (200,300 and 400)°∁ . Wear resistance was tested by ASTM G99 to evaluate the best result of creating a nano composite coating, in order to add Nano graphene , the graphene was added by (0.1 , 0.3 , 0.5 and 0.7) g /l. to coating bath . The FESEM filed emission scanning electron was conduct , x-ray diffraction to figure out the alloy compound on the layer coating , EDS energy dispersive spectroscopy to calculate the wt% P for low , medium and high , the pin on disk type were accomplished to evaluate the coating best result against the wear resistance. The results of the experiments showed that the coating with different weight% P, different coating time and different heat treatment temperature leads to improved wear resistance due to increased hardness and reduced friction coefficient by the addition of graphene.

Preparation of a Ni-P-nanoPTFE Composite Coating on the Surface of GCr15 Steel for Spinning Rings via a Defoamer and Transition Layer and Its Wear and Corrosion Resistance

“…The prepared nickel–phosphorus coating exhibits good resistance to wear and corrosion. Simultaneously, it can further introduce various functional particles, such as SiC, Al 2 O 3 , PTFE, MoS 2 , and others, to co-deposit with the nickel–phosphorus alloy to form a composite coating, endowing the coating with special properties, such as super hardness and self-lubrication [ 12 , 13 , 14 , 15 ]. Among them are soft nano-PTFE particles, which have a considerably low dynamic friction coefficient [ 16 , 17 , 18 ].…”