Tribological performance of 2‐mercaptobenzothiazole derivatives as lubricating oil additives

Abstract

Purpose

The paper's aim is to study tribological performances of two 2‐mercaptobenzothiazole derivatives which are ashless and lacking in phosphorous as lubricating oil additives in HVIW H150 base oils.

Design/methodology/approach

The two 2‐mercaptobenzothiazole derivatives were synthesized; their tribological performances were evaluated with a four‐ball machine, and the worn surface was analyzed with a X‐ray photoelectron spectroscopy (XPS).

Findings

The two compounds possess good anti‐wear properties and excellent load‐carrying capacity. According to the XPS results, the additive reacted with counter‐face metal and generated a sulphur‐containing inorganic film consisting of FeS, FeS₂ and FeSO₄, and a complex N‐containing resin polymer film.

Research limitations/implications

Their antioxidant properties are not estimated, and their anti‐wear action mechanism need to be further explored.

Practical implications

Two useful ashless AW lubricating oil additives were synthesized, and may be has potential as gas engine lubricating oil additives.

Originality/value

This paper provides a study of some N, S‐containing heterocyclic compounds as lubricating oil additives.

Citation

Wu, H., Zeng, X.Q. and Ren, T.H. (2008), "Tribological performance of 2‐mercaptobenzothiazole derivatives as lubricating oil additives", Industrial Lubrication and Tribology, Vol. 60 No. 4, pp. 183-188. https://doi.org/10.1108/00368790810881524