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dc.contributor.authorSautermeister, F.A.*
dc.contributor.authorPriest, Martin*
dc.contributor.authorLee, P.M.*
dc.contributor.authorFox, M.F.*
dc.date.accessioned2016-10-07T14:39:14Z
dc.date.available2016-10-07T14:39:14Z
dc.date.issued2013
dc.identifier.citationSautermeister FA, Priest M, Lee PM and Fox MF (2013) Impact of sulphuric acid on cylinder lubrication for large 2-stroke marine diesel engines: contact angle, interfacial tension and chemical interaction. Tribology International. 59: 47-56.
dc.identifier.urihttp://hdl.handle.net/10454/9724
dc.descriptionother
dc.descriptionno
dc.description.abstractThe effect of sulphuric acid on the chemical and physical behaviour of the piston ring lubricant in a marine engine cylinder was investigated. To reveal the basic influence of H2SO4 on the lubricant film, the saturated hydrocarbon Squalane (C30H62) was chosen as a simple model oil. The interfacial tension between aqueous H2SO4 (0-98% w/w) and C30H62 was measured between -3 and 165 degrees C to understand droplet formation in the lubricant. Interfacial tension decreases with increasing acid concentration and is temperature dependent.
dc.description.abstractThe wettability of engine parts with corrosive sulphuric acid was characterised by the contact angle. The contact angle of H2SO4 (0-98% w/w) on a grey cast iron cylinder liner material (Wartsila, RT84) and a piston ring chrome-ceramic coating (Federal Mogul Goetze, CKS, empty set960 mm) immersed in C30H62 was measured over a temperature range from 20 to 165 degrees C. In general, larger contact angles were measured under higher temperature conditions and on chrome surfaces.
dc.description.abstractIn addition to the physical measurements, chemical reaction between H2SO4 and C30H62 was observed which influenced the interfacial tension, visual appearance, phase separation and formation of solid matter. The reaction time was found to be faster than the neutralisation times of commercially formulated lubricants. The reaction products were analysed using FTIR spectroscopy and EDX to find oxidation and sulphonation.
dc.relation.isreferencedbyhttp://dx.doi.org/10.1016/j.triboint.2012.06.002
dc.subjectLubrication base oil; Lubrication emulsion; Surface wetting; Lubricant degradation; Marine diesel engines
dc.titleImpact of sulphuric acid on cylinder lubrication for large 2-stroke marine diesel engines: Contact angle, interfacial tension and chemical interaction
dc.typeJournal Article
dc.type.versionNo full-text in the repository


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