New Method of Simulation to Evaluate the Sensitivity to Oxidation of Lubricating Oils: An Aging Cell Coupled with Fourier Transform Infrared Spectroscopy

Authors: Priéri, F.¹; Gresser, E.²; Le Dréau, Y.¹; Obiols, J.²; Kister, J.¹

Source: Applied Spectroscopy, Volume 62, Issue 7, Pages 160A-174A and 721-832 (July 2008) , pp. 810-816(7)

Publisher: Society for Applied Spectroscopy

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Abstract:

This study presents a new method for evaluating the oxidation of lubricating oils. An aging cell adapted to a Fourier transform infrared (FT-IR) spectrometer allows the continuous and direct study of the oxidative aging of base oils. During the test, oxidation bands appeared in the spectra (carbonyl bands around 1730 cm⁻¹). The graphic representation of the carbonyl band modification—using a spectroscopic index—makes it possible to monitor the evolution of the lubricant composition. Comparing the oxidation constants, determined from the kinetic plots of several base oils, makes it possible to evaluate their relative sensitivity.

Keywords: OXIDATION STABILITY; LUBRICATING OILS; FOURIER TRANSFORM INFRARED SPECTROSCOPY; FT-IR SPECTROSCOPY; AGING CELLS; SIMULATION

Document Type: Research article

DOI: 10.1366/000370208784909571

Affiliations: 1: Université Paul Cézanne, UMR CNRS 6171 Système Chimique Complexe, Laboratoire de Géochimie Organique Analytique et Environnement, case 451, 13397 MARSEILLE cedex 20 2: Centre de recherche Total France (CReS), BP22 - 69360 Solaize Cedex