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Tribological behavior of the low‐concentration boric acid and ZDDP lubricating oil mixtures
Author(s) -
Özkan Doğuş,
Sulukan Egemen
Publication year - 2019
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6656
Subject(s) - tribology , boric acid , tribometer , base oil , materials science , boundary lubrication , lubrication , lubricant , base (topology) , reciprocating motion , zinc , metallurgy , chemical engineering , chemistry , composite material , organic chemistry , scanning electron microscope , mechanical engineering , engineering , mathematical analysis , mathematics , gas compressor
Zinc dithiophosphate (ZDDP)‐free environmental friendly lubricating oil research studies have gained importance due to the governmental regulations over the last decade. In this study, low concentration boric acid‐base oil and ZDDP‐base oil mixtures were investigated with a ball on flat reciprocating tribometer to evaluate their tribological performances. The tribological performances of 1, 3, and 5% additive and base oil mixtures were evaluated at boundary lubrication condition in three main contexts including wear rates, surface tribochemistry, and friction. Results showed that there was no significant difference between boric acid and ZDDP friction coefficients. However, boric acid showed poor wear resistance when compared with ZDDP and it cannot be an alternative additive alone to ZDDPs.