TY - JOUR
T1 - Ashless and non-corrosive disulfide compounds as excellent extreme pressure additives in naphthenic oil
AU - Ling Ong, Chiu
AU - Jiang, Xuefeng
AU - Ching Juan, Joon
AU - Ghaffari Khaligh, Nader
AU - Heidelberg, Thorsten
N1 - Publisher Copyright:
© 2022
PY - 2022/4/1
Y1 - 2022/4/1
N2 - Medium chain chlorinated paraffin (MCCP) and zinc dialkyl dithiophosphate (ZDDP) are widely used as extreme pressure (EP) additives in metalworking fluids (MWFs). Currently, sulfur-based EP additives are found to be more environmentally friendly and biodegradable. Although naphthenic base oil (NBO) is suitable to be used in MWFs due to its low pour point and better emulsified ability, there is a lack of study on the sulfur additives in this type of oil. In this study, two organo disulfides compounds namely dibenzyl disulfide (DBDS) and dioctyl disulfide (DODS) have been synthesized as EP additives. These DBDS and DODS demonstrate an excellent EP performance, non-corrosive, ashless, and good anti-wear (AW) properties in NBO. The DBDS shows 1961 N (EP value) and 6 mm2 (AW scar area) in NBO, which is superior to DODS, MCCP and ZDDP. This is due to the formation of sulfur-based tribofilm on the interface that acts as a protective sulfur layer thus, enhancing the property of EP.
AB - Medium chain chlorinated paraffin (MCCP) and zinc dialkyl dithiophosphate (ZDDP) are widely used as extreme pressure (EP) additives in metalworking fluids (MWFs). Currently, sulfur-based EP additives are found to be more environmentally friendly and biodegradable. Although naphthenic base oil (NBO) is suitable to be used in MWFs due to its low pour point and better emulsified ability, there is a lack of study on the sulfur additives in this type of oil. In this study, two organo disulfides compounds namely dibenzyl disulfide (DBDS) and dioctyl disulfide (DODS) have been synthesized as EP additives. These DBDS and DODS demonstrate an excellent EP performance, non-corrosive, ashless, and good anti-wear (AW) properties in NBO. The DBDS shows 1961 N (EP value) and 6 mm2 (AW scar area) in NBO, which is superior to DODS, MCCP and ZDDP. This is due to the formation of sulfur-based tribofilm on the interface that acts as a protective sulfur layer thus, enhancing the property of EP.
KW - Ashless
KW - Extreme pressure
KW - Non-corrosive
KW - Sulfur additives
KW - Symmetrical disulfide
UR - https://www.scopus.com/pages/publications/85123872675
U2 - 10.1016/j.molliq.2022.118553
DO - 10.1016/j.molliq.2022.118553
M3 - 文章
AN - SCOPUS:85123872675
SN - 0167-7322
VL - 351
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
M1 - 118553
ER -