Title page for ETD etd-08132008-103521


Document Type Master's Dissertation
Author Mogwaneng, Pheladi Junior
URN etd-08132008-103521
Document Title Optimization of rolling mill oils evaluation using FT-IR spectroscopy
Degree MSc
Department Chemistry
Supervisor
Advisor Name Title
Prof D de Waal Supervisor
Keywords
  • rolling oils
  • vegetable-based rolling oils
  • lubricants
Date 2004-09-06
Availability unrestricted
Abstract
During the cold reduction of steel sheet in a rolling mill, rolling oils are used for lubrication to provide the desired steel surface. Rolling oil formulations consist largely of mineral oils, glycerides and/or synthetic esters, fatty acids, emulsifiers and additives. These oils are generally used as 2-5% emulsions and will be subjected to high temperature and pressure during use. This results in chemical changes within the oil that can affect steel surface cleanliness after annealing. It is advantageous to have rolling oils that are stable but easily removed during annealing and leaving a minimal amount of residues. Thus in the field of rolling mill technology the surface quality of rolled product and stability of rolling oils are critical in the selection of lubricants. Additionally, production cost and environmental impact are also critical in the selection of lubricants. In this study, the performance of vegetable-based rolling oils was investigated by recording the FTIR spectra of the oils using Horizontal Attenuated Total Reflectance, an internal reflection accessory, before and after systematic heat treatment. Evidence was found that the vegetable-based oils degraded on heating and the spectroscopic analysis indicated that this was due to rearrangement of unsaturated components from a cis to a trans configuration.

2004 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.

Please cite as follows:

Mogwaneng, PJ 2004, Optimization of rolling mill oils evaluation using FT-IR spectroscopy, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-08132008-103521/ >

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