The effect of molecular weight on the behavior of polystyrene coated steel disks under fretting conditions

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dc.contributor.authorBradley, Randall S.en
dc.contributor.committeechairEiss, Norman S. Jr.en
dc.contributor.committeememberFurey, Michael J.en
dc.contributor.committeememberTaylor, Larry T.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:40:57Zen
dc.date.adate2010-07-21en
dc.date.available2014-03-14T21:40:57Zen
dc.date.issued1988-12-09en
dc.date.rdate2010-07-21en
dc.date.sdate2010-07-21en
dc.description.abstractThin polymeric coatings have been applied to metal surfaces to prevent and/or prolong the onset of fretting corrosion, but the properties that make a polymeric coating effective and the means by which a coating fails are unknown. The purpose of this study was to determine the effect of molecular weight, casting solvent, and amplitude of motion on the life of thin (25 ~m nominal) polystyrene coatings. Narrow molecular weight distribution polystyrene coatings ranging from <Mw>=19,400 to <Mw>=1,460,000 were applied to UNS G10450 steel disks with toluene and MEK as casting solvents. The coatings were fretted against UNS G52100 steel balls at 20 Hz under 22.3 N normal load. Amplitudes of motion ranged from 100 ~m to 500 ~m. Coating life and friction force were measured. Coatings of <Mw>=207,700 showed maximum life at all amplitudes. Friction remained constant for all tests, and increasing amplitude decreased life. Toluene-cast coatings had slightly shorter lives and more coating racks than MEK-cast coatings. Toluene-cast coatings below <Mw>=53,700 cracked severely during solvent removal and were not tested.en
dc.description.degreeMaster of Scienceen
dc.format.extentxiii, 211 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-07212010-020238en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07212010-020238/en
dc.identifier.urihttp://hdl.handle.net/10919/43837en
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1988.B723.pdfen
dc.relation.isformatofOCLC# 19609314en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1988.B723en
dc.subject.lcshFretting corrosionen
dc.subject.lcshProtective coatings -- Testingen
dc.subject.lcshSteel -- Surfacesen
dc.titleThe effect of molecular weight on the behavior of polystyrene coated steel disks under fretting conditionsen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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