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Bronze-Steel Friction Characteristics under the Lubrication of Modified Water/Glycerol Mixtures
Luleå University of Technology, Department of Engineering Sciences and Mathematics. (Master Tribos)
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Increasing environmental awareness has driven a lot of research to look into various environmentally friendly lubricants which can replace more conventional mineral oil based lubricants. This is true in particular for marine and hydropower applications where the risk of lubricant leakage can be damaging to the local environment. Glycerol is an organic compound produced as a byproduct when producing Biodiesel. It is environmentally friendly and has been used by the pharmaceutical and food industries for a long time. Recent research has shown that glycerol has very good tribological properties and can be used as a lubricant in some applications. However, its high viscosity and high static friction are disadvantageous and needs improvement. The purpose of this study is to investigate possible surface active environmentally adapted additives in glycerol and water solutions. 14 additives have been selected for testing and were tested in a pin-on-disc start-stop friction test to see their effect on the static and dynamic friction coefficients. From these 14 additives two were selected due to their superior performance and were further studied. The effect of concentration of water and additive in glycerol was also investigated using the same test conditions. A phosphor based additive has been found to be the best performing.

Place, publisher, year, edition, pages
2017. , p. 29
Keywords [en]
Glycerol, glycerol additives, stick-slip, shudder, friction modifiers
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
URN: urn:nbn:se:ltu:diva-65217OAI: oai:DiVA.org:ltu-65217DiVA, id: diva2:1134646
Educational program
Mechanical Engineering, master's level (120 credits)
Supervisors
Examiners
Available from: 2017-08-22 Created: 2017-08-21 Last updated: 2018-01-13Bibliographically approved

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Hamouda, Karim
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Tribology (Interacting Surfaces including Friction, Lubrication and Wear)

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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Output format
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