Abstract
The load-carrying capacity, friction reduction and antiwear properties of two benzotriazole derivatives containing the R 2NC(=S)S- group, added in liquid paraffin under boundary lubrication conditions were evaluated using a Seta-Shell Four-ball lubrication machine and an optimal SRV tester. Their anticorrosive and antioxidative properties, and thermal stabilities 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 similar to ZDDP and better antiwear and antioxidative properties than ZDDP. Besides that, they have good anticorrosive properties and high thermal stabilities. The rubbed surfaces were investigated using X-ray photoelectron spectroscopy, Auger electron spectroscopy and electron probe microanalysis analytical tools. The extreme-pressure, antiwear and antioxidative mechanisms were discussed.
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