Tribological Behavior of Ni-P Electroless Plating of Low Alloy Steel With Carbon Nanotubes

The basic aim to study wear resistance and hardness of heat treatment of coatings with electroless Ni-P-CNT. Various concentration of CNTs range, 0, 0.1, 0.2 and 0.4 g/L in Ni-P-CNT composite was deposit on low alloy steel in electroless immersion. The Ni-P-CNT electroless coatings were prepared by using nickel chloride as a source for nickel in alkaline bath and used CNT. The formulas were characterized with means of EDS, SEM, micro hardness, surface roughness and wear resistance measurements. The results of that micro hardness showed higher hardness (560 HV) was achieved for heat-treated sample (Ni-B-0.1g/l CNT). The results enhance the concentration of CNTs caused structure of as-coated NiP conversion from amorphous to crystalline. Compared to the Ni-P coating, wear resistance of composite coating (Ni-PCNT) is better, and they become much better with the increase of CNT concentration. The adding of CNT makes the coating denser and the presence of CNT makes the size of grain to decrease in accordance with the heat treated formulae, but too much CNT deposited on the substrate leads to a high region of the CNT wrapped together. and agglomeration that occurs is very unfavorable to coating, resulting in lead wear resistance of the composite coating and becomes worse. The basic aim to study wear resistance and hardness of heat treatment of coatings with electroless Ni-P-CNT. Various concentration of CNTs range, 0, 0.1, 0.2 and 0.4 g/L in Ni-P-CNT composite was deposit on low alloy steel in electroless immersion. The Ni-P-CNT electroless coatings were prepared by using nickel chloride as a source for nickel in alkaline bath and used CNT. The formulas were characterized with means of EDS, SEM, micro hardness, surface roughness and wear resistance measurements. The results of that micro hardness showed higher hardness (560 HV) was achieved for heat-treated sample (Ni-B-0.1g/l CNT). The results enhance the concentration of CNTs caused structure of as-coated NiP conversion from amorphous to crystalline. Compared to the Ni-P coating, wear resistance of composite coating (Ni-PCNT) is better, and they become much better with the increase of CNT concentration. The adding of CNT makes the coating denser and the presence of CNT makes the size of grain to decrease in accordance with the heat treated formulae, but too much CNT deposited on the substrate leads to a high region of the CNT wrapped together. and agglomeration that occurs is very unfavorable to coating, resulting in lead wear resistance of the composite coating and becomes worse.