The ep performance of certain S-benzylisoformamidinothiocarbamides in the four-ball test

Abstract

Load carrying capacities of certain 1-formamidino-2-S-benzyliso-3-arylthiocarbamides were assessed using a four-ball extreme-pressure (ep) lubricant testing machine. All the compounds tested were found to be effective at high loads. 1-formamidino-2-S-benzyliso-3-phenylthiocarbamide was potentially useful at high loads; m-chlorophenyl- and p-tolyl derivatives were effective at low loads as well. For a comparative study a reference additive was used. Scanning electron microscopy was used to study the tribological properties. © 1984.