Synthesis and Tribological Properties of Zinc Dodecoxyborate as Antiwear and Friction Reducing Additive of Lubricating Oil

Oil soluble zinc dodecoxyborate was synthesized. Its tribological properties as a lubricting oil additive were evaluated using four ball and ring on block tribotesters. The results indicate that the wear resistance and load carrying capacity of 500SN base oil were increased and the friction coefficient was decreased by the additive. The wear scar was observed with SEM. It has been found that the scufffing of the tested steel ball lubricated with addtive containing base stock is greatly abated as compared with that lubricated with base stock alone. It is suggested that tribochemical reactions were involved in the friction process, which generated a protective film containing borides on the lubricated steel surface. This contributes to improve the antiwear and extreme pressure properties of the base stock.