STUDY ON l,3,4-TH1ADIAZOLE DERIVATIVES AS NOVEL MULTIFUNCTIONAL OIL ADDITIVES

摘要

The load-carrying capacity, friction reduction, and antiwear properties of two l,3,4-thiadiazole derivatives added to liquid paraffin under boundary lubrica- tion conditions were evaluated using a four-ball test machine. Their anticor- rosive and antioxidative properties and thermal stability were also examined. The results when compared with those of zinc butyloctyldithiophosphate (ZDDP) show that the two novel compounds possess an excellent load- carrying capacity and better antiwear and antioxidative properties than ZDDP. In addition, they have good anticorrosive properties and high thermal stability. The rubbed surface was investigated using X-ray photoelectron spectroscopy and electron probe microanalysis. The extreme-pressure antiwear and anti- oxidation mechanisms are discussed.