Lanthanum dithiocarbamates as potential extreme pressure lubrication additives

International Journal of Industrial Chemistry

دوره 3، شماره 1، اسفند 2012، صفحه 1-10

نوع مقاله: research article

شناسه دیجیتال (DOI): https://doi.org/10.1186/2228-5547-3-32

نویسندگان

Rashmi B Rastogi^* ؛ Jiya L Maurya؛ Vinay Jaiswal؛ Dhanesh Tiwary

Department of Applied Chemistry, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India

چکیده

The extreme pressure lubrication (EPL) properties of bipyridyl adducts of different lanthanum dithiocarbamates of the type LaL₃·bipy (where LH = dimethyl dithiocarbamate (Me₂DTCH), piperidine dithiocarbamate (PipDTCH), morpholine dithiocarbamate (MorphDTCH), and diphenyl dithiocarbamate (Ph₂DTCH); bipy = 2,2^′-bipyridyl) have been evaluated with a four-ball lubricant tester using steel balls of 12.7-mm diameter and molybdenum disulfide as a reference additive. Various tribological parameters, viz. mean wear scar diameter, friction coefficient, mean specific pressure, initial seizure load, 2.5-s seizure delay load, weld load, flash temperature parameter, mean Hertz load, pressure wear index, etc., have been determined. The surface topography of wear scar has been studied by atomic force microscopy and scanning electron microscopy. Energy-dispersive X-ray analysis has been performed to give the composition of the wear scar surface.

کلیدواژه‌ها

Lanthanum dithiocarbamates؛ Extreme pressure lubrication additives؛ SEM؛ EDX؛ AFM