Corrosion and tribological performance of PTFE-coated electroless nickel boron coatings
Year: 2016
Journal: Surf. Coat. Technol.
Authors: Wan, Y; Yu, Y; Cao, L; Zhang, M; Gao, J; Qi, C
Electroless nickel boron (Ni-B) coatings are finding their applications in the aerospace, automotive, chemical and electrical industries due to their properties such as high hardness and high wear resistance. However, Ni-B coatings generally show high friction. They also suffered from severe attacks in aqueous solution containing Cl- ion. In this paper, the experiments are carried out to reduce the friction and improve corrosion resistant properties of Ni-B coating by PTFE impregnation. It is found that Ni-B coating after impregnated by an aqueous solution containing 40 wt% PTFE nanoparticles is able to withstand a rubbing test duration of 3600 s with the coefficient of friction as low as <0.1 under both dry sliding and lubricated by 3.5% NaCl solution. Additionally, the corrosion resistance of Ni-B coating on steel can be improved after PTFE impregnation. (C) 2016 Elsevier B.V. All rights reserved.
