Fabrication of Ni-B-G Wear Resistant Coating by Electroless Method

Nickel-Boron autocatalytic coatings are widely used in several industries to improve mechanical properties of materials such as hardness and wear resistance. Tribological properties were evaluated in Ni-B-G autocatalytic coatings deposited on AISI 4140 carbon steel before and after a heat  treatment at 400 °C for one hour. Tribological tests were carried out by pin-on-disk method, using a load of 5 N and speed of 0.04 m/s, which followed ASTM G99 standard. According to the tribological evaluation, the heat treatments applied to Ni-B-G coatings improved their tribological performance. This research corroborates that by applying an adequate heat treatment, hardness and wear resistance of Ni-B-G coatings can be improved significantly.