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Emerald Group Publishing Limited
Copyright © 2001, MCB UP Limited
In this issue, Sven Berg of Lulea University of Technology in Sweden presents more of his work on lube oil sampling techniques. Following on from the methods that he covered in our last issue he now moves on to recommendations on the best method to use and highlights the variations in analytical results possible between the different methods. This work will be of wide interest to those involved with preventative maintenance systems using used oil sampling techniques. Considerable time is spent by those engaged in interpreting analysis results when the reliability of the sample or the sampling technique may not be as good as it could be. More basic work similar to that undertaken by Sven in this field will I am sure improve our real predictability of service life from oil analysis.
Drilling muds, although used in very large quantities around the world, rarely feature in our journal. However considerable work has been going on in this lubricant field especially to meet ever more stringent environmental constraints. It is interesting then for us to be able to publish work done by Basil Onyekpe of Shell in Nigeria. Basil has looked at the effects on drilling muds of carbonate contamination. Although of primary use to those working in the same field it does seem likely that this work will be useful to others interested in lubricant contamination generally.
Professor Yilbas of the ME Department of KFUPM in Dhahran, Saudi Arabia and colleagues from Dublin City University in Ireland present in this issue work they have done on the alloy Iconel 617. This material is widely used in for example aircraft gas turbines because of its high temperature properties. However after a long period of time the microcrystalline structure changes. The work done examines the results of corrective heat treatment in terms of fatigue strength and, perhaps more importantly in our field surface corrosion potential.
I hope that these three excellent pieces of work from widely differing areas will provide our readers with some thoughts that can be transported to their own area of activity