INFLUENCE MECHANISM OF TCP AND T706 ON CORROSION WEAR PERFORMANCE OF AERO-TURBINE ENGINE LUBRICATING OIL
Aiming at the problem of corrosion wear caused by aviation turbine engine lubricating oil on the friction surface of the transmission system of the turbine engine,based on the evaluation method of corrosion wear of aviation turbine engine lubricating oil,the influence of impurities such as chlorine and sulfur content in the additives of trimethylphenol phosphate(TCP)and benzotriazole(T706)in aviation turbine engine lubricating oil on the corrosion wear of the friction pair was studied by using a four ball tester,and the mechanism of its impact on corrosion was revealed.The results showed that impurities such as chlorine in both TCP and T706 could cause corrosion wear of metal,the influence of chlorine in T706 on corrosion wear was greater than that of chlorine in TCP.The corrosion caused by chlorine in T706 is mainly electrochemical corrosion,but not chemical corrosion.However,the influence of sulfur in T706 on surface corrosion of metal is more complicated,when the sulfur content is low,shallow corrosion is prone to occur;when the sulfur content is high,deep corrosion occurs,forming dense corrosion pits.Organic acid is not the main factor causing metal corrosion,so the introduction of acid scavengers does not significantly improve metal corrosion.Urea as a corrosion inhibitor can greatly improve the metal corrosion caused by chlorine in T706.
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