Physico-chemical Properties of Ni-P Hexagonal Boron Nitride Composite Coatings

Abstract

Certain nickel polyalloys, such as Ni-P-BN(h) and Ni-P-PTFE, are commonly used in the molding and stamping industries as they produce superior anti-galling coatings. In addition, PTFE and BN(h) are known for their high thermal stability and great solid lubrication, which can improve the wear characteristics of the coating. On the other hand, poor wettability of the BN(h) coating counts as a disadvantage that can be solved by incorporation within the Ni-P matrix. BN(h) particles also improve the corrosion resistance of Ni-P coatings, and heat treatment can raise their hardness. This study focuses on the corrosion behavior of hexagonal boron nitride (BN(h)) co-deposited on nickel-phosphorus (Ni-P) coating by utilizing an electroless deposition process. Tribological and electrochemical tests are utilized to study the interaction between the coating and substrates of mold used in the tire industry.