The Friction and Wear Behaviors of (quinazolin-4-ones)-3-methyl-butyl Borate as Additive in Liquid Paraffin

There has been growing concern for the use of mineral oils because of the worldwide interest in environmental issues. This has promoted the use of ash less additives as environmental friendly lubricants. A potential ash less additive containing N, B, and O was synthesized by reacting 3-hydroxymethyl-quinazolin-4-ones and formal in in 1, 4-dioxane solutin, the resulting product then being reacted with butanol and boric acid in dimethylbenzene solution. The friction and wear behaviors of the novel co pound when added to liquid paraffin was evaluated using a four-ball tester and a ring-on-block machine. The relationship between performance and concentration was analysed, and the results show that the compound possesses good anti wear, friction-reducing and load-carrying properties. The mechanism of action of the additive was investigated using X-ray photoelectron spectroscopy (XPS). Surface analysis indicated the formation of a protective film containing borate, Fe₃O₄, and an organ nitrogen compound. This protective film formed during sliding processes contributes to the increase in wear resistance.