Utilising Fenton reagent to simulate oxidation processes in turbine oil. (31st August 2013)

• Record Type: Journal Article
• Authors: Lu, Ya; Zhou, Dong
• Is Part Of: Lubrication science. Volume 26:Number 2(2014:Mar.)
• Page Start: 131
• Page End: 139
• Publication Date: 2013-08-31
• Subjects: Tribology -- Periodicals; Lubrication systems -- Research -- Periodicals; Surfaces (Technology) -- Research -- Periodicals; 621.89
• DOI: 10.1002/ls.1237
• Languages: English
• ISSNs: 0954-0075

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>To meet the demands of less‐sludge deposit and longer‐service life, turbine oils need to possess superior oxidation stability. Commercially available turbine oil nitrogen tetroxide (NTO) became green in an actual turbine, which was a risk of serious damage to turbine bearing and lubricating systems. By analysis of pH discoloration, infrared spectroscopy, it is found that the chromogenic materials in in‐service oil of NTO (UTO) were the oxidation products of diphenylamine antioxidant at low temperatures. Then, a method utilising Fenton reagent was developed to accelerate oxidation process for assessment of discoloration of turbine oil in service. By screening of experimental conditions, the colour and structure of chromogenic materials in accelerated oxidation products from NTO are the same as those of in‐service oil of NTO. Turbine oils in different formulation are oxidised by Fenton reagent in preceding condition. The colours of oxidation products are consistent with the results of ASTM D943 after 1000 h test. This study also provided a better understanding of the oxidation process affecting lubricants and the functional mode of the radical scavenger antioxidant. Copyright © 2013 John Wiley &amp; Sons, Ltd.</p> </abstract>