Friction reduction of pre-phosphating nanofilm on bearing steel by tricresyl phosphate pretreatment in boundary lubrication

Abstract

The study shows that the boundary lubrication performance of bearing steel can be improved by pretreatment with tricresyl phosphate. By X-ray photoelectron spectroscopy and scanning electron microscopic analyses of pre-slid and slid-bearing steel specimens, some mechanisms likely related to such improvement in tribological performance are revealed. It is identified that: (i) production of nanophosphate film on steel surface reduces friction from 0.08 to 0.035 and enhances anti-wear ability; (ii) wear mode is mainly ploughing in nature; and (iii) tricresyl phosphate surface pretreatment prevents the oxidation of lubricant oil. Such findings give some insight to applying tricresyl phosphate pretreatment on modifying the tribological behaviors of the rolling bearing of aeroengine.

Lubrication effectiveness investigation on the friendly capped MoS2 nanoparticles

“…The tribological tests were then carried out at room temperature and humidity. To ensure the boundary lubrication, tests were performed under the following conditions: a normal force of 30 N and a sliding velocity at 0.036 m s −1 . The reciprocating linear stroke was 6 mm.…”

Tribological Properties of Phosphate Ester Confined between Iron-Based Surfaces

“…In this study, our main focus is on antiwear additives that have a substantial impact on the friction reduction and antiwear properties of lubricating oil. Antiwear additives achieve their effects by forming chemically adsorbed films on the friction surfaces. − Zinc dialkyl dithiophosphate (ZDDP) is a widely used antiwear additive; however, the presence of phosphorus, sulfur, and especially zinc elements in ZDDP results in environmental concerns. Therefore, efforts have been made to search for ZDDP alternatives that are ashless (metal-free) and have lower levels of phosphorus and sulfur. − While completely eliminating these three elements from lubricating oil is challenging, numerous ashless ZDDP alternatives have emerged.…”

A Study on the Wettability of Ion-Implanted Stainless and Bearing Steels

“…Aeroengine bearings always work in complex conditions such as high temperature and load. Meanwhile, aeroengine bearings often encounter corrosive environments such as high humidity or salinity, as well as harsh environments during cross-sea flying or the berthing process [1][2][3]. Thus, it is urgently necessary to combat complex service environments through surface modification technologies to improve the corrosion and wear resistance of bearings under complex uses so as to extend service life.…”