Tribological studies on a new borated mannich base containing benzotriazole group as additive for environmentally adapted lubricant

A novel borated mannich base containing benzotriazole group additive (abbreviated as BTBM) is synthesised and characterised. Its tribological properties as an additive in rapeseed oil are evaluated and compared with zinc dialkyldithiophosphate (ZDDP). The results show that BTBM have high P-B value, but bad anti sintering ability. The anti-wear property of BTBM is not as good as ZDDP; however, it shows excellent property in friction-reducing and expects to be a comprehensive friction modifier. X-ray photoelectron spectroscopy results indicate that BTBM can form adsorption layer consisting of fracted organic borates or deposited B2O3 and organic nitrogen compounds settled layer in the process of friction. As corrosion inhibitor, BMBT can inhibit the corrosion of active S element to copper significantly.