NDLI: Full Film, Boundary Lubrication and Tribochemistry in Steel Circular Contacts Lubricated with Glycerol

Content Provider	Springer Nature Link
Author	Habchi, W. Matta, C. Joly Pottuz, L. Barros, M. I. Martin, J. M. Vergne, P.
Copyright Year	2011
Abstract	In this article, the lubricating properties of pure glycerol are investigated under both mild and severe EHL regimes. Amazingly low friction coefficients (about 0.01) are reported by experiments in thick film regimes compared to traditional base oils. EHL calculations of film thickness and friction (including thermal effects) predict friction coefficients that are twice those actually found for glycerol. Chemical analysis of glycerol before and after the friction tests were performed by NMR and Karl Fischer methods, and they reveal that water is produced by tribochemical reaction as well as other species like aldehydes. This finding is in agreement with a corrosion pattern observed inside the wear scars of the steel samples. This study provides an explanation to the anomalously low friction observed in the thick film regime. In fact, water produced in the lubricant decreases traction forces due to the drastic decrease of the viscosity of glycerol with water addition.
Starting Page	351
Ending Page	358
Page Count	8
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	42
Issue Number	3
e-ISSN	15732711
Language	English
Publisher	Springer US
Publisher Date	2011-04-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Glycerol EHL lubrication Tribochemistry Water lubrication Surfaces and Interfaces, Thin Films Theoretical and Applied Mechanics Tribology, Corrosion and Coatings Physical Chemistry Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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