Effect of Surface Roughness on Tribochemical Decomposition of Synthetic Oils under High-Vacuum Conditions

This study investigates the effects of both, molecular structure and surface roughness, on the tribochemical decomposition of synthetic base oils under high-vacuum conditions. Nascent steel surfaces exhibit high activity to catalyze the decomposition of synthetic oil under lubricating conditions. De...

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Autores principales:	Koji Takiwatari, Hidetaka Nanao, Yasushi Hoshi, Michimasa Uchidate, Shigeyuki Mori
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2019
Materias:	nascent surface hydrogen evolution tribochemical decomposition synthetic oil surface roughness Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/2fc584143f0340db8620dafdd5908a02
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id	oai:doaj.org-article:2fc584143f0340db8620dafdd5908a02
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spelling	oai:doaj.org-article:2fc584143f0340db8620dafdd5908a022021-11-05T09:17:26ZEffect of Surface Roughness on Tribochemical Decomposition of Synthetic Oils under High-Vacuum Conditions1881-219810.2474/trol.14.398https://doaj.org/article/2fc584143f0340db8620dafdd5908a022019-12-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/14/5/14_398/_pdf/-char/enhttps://doaj.org/toc/1881-2198This study investigates the effects of both, molecular structure and surface roughness, on the tribochemical decomposition of synthetic base oils under high-vacuum conditions. Nascent steel surfaces exhibit high activity to catalyze the decomposition of synthetic oil under lubricating conditions. Decomposition was performed on multiply alkylated cyclopentane (MAC) and alkyl diphenyl ether (ADE) at the nascent surface of bearing steel 52100 and was monitored by a ball-on-disk friction tester in a vacuum chamber attached to a quadrupole mass spectrometer. Although MAC decomposed, ADE did not decompose on the flat steel surface. Steel surfaces used within this experiment underwent procedural abrasion, providing the requisite roughness to generate the nascent steel surface for the friction test. Decomposition of ADE and desorption of benzene were observed in the presence of the nascent steel surface under friction. As the surface morphology of the pretreated roughened surfaces changed during friction, the contact pressure and plasticity of the surface decreased. We concluded that the tribochemical decomposition of ADE was accelerated on rough steel surfaces by the generation of a nascent surface at the point of metal-metal contact. From these results, the critical role of a nascent steel surface on the tribochemical decomposition of syntheticoils is discussed.Koji TakiwatariHidetaka NanaoYasushi HoshiMichimasa UchidateShigeyuki MoriJapanese Society of Tribologistsarticlenascent surfacehydrogen evolutiontribochemical decompositionsynthetic oilsurface roughnessPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 14, Iss 5, Pp 398-403 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	nascent surface hydrogen evolution tribochemical decomposition synthetic oil surface roughness Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	nascent surface hydrogen evolution tribochemical decomposition synthetic oil surface roughness Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Koji Takiwatari Hidetaka Nanao Yasushi Hoshi Michimasa Uchidate Shigeyuki Mori Effect of Surface Roughness on Tribochemical Decomposition of Synthetic Oils under High-Vacuum Conditions
description	This study investigates the effects of both, molecular structure and surface roughness, on the tribochemical decomposition of synthetic base oils under high-vacuum conditions. Nascent steel surfaces exhibit high activity to catalyze the decomposition of synthetic oil under lubricating conditions. Decomposition was performed on multiply alkylated cyclopentane (MAC) and alkyl diphenyl ether (ADE) at the nascent surface of bearing steel 52100 and was monitored by a ball-on-disk friction tester in a vacuum chamber attached to a quadrupole mass spectrometer. Although MAC decomposed, ADE did not decompose on the flat steel surface. Steel surfaces used within this experiment underwent procedural abrasion, providing the requisite roughness to generate the nascent steel surface for the friction test. Decomposition of ADE and desorption of benzene were observed in the presence of the nascent steel surface under friction. As the surface morphology of the pretreated roughened surfaces changed during friction, the contact pressure and plasticity of the surface decreased. We concluded that the tribochemical decomposition of ADE was accelerated on rough steel surfaces by the generation of a nascent surface at the point of metal-metal contact. From these results, the critical role of a nascent steel surface on the tribochemical decomposition of syntheticoils is discussed.
format	article
author	Koji Takiwatari Hidetaka Nanao Yasushi Hoshi Michimasa Uchidate Shigeyuki Mori
author_facet	Koji Takiwatari Hidetaka Nanao Yasushi Hoshi Michimasa Uchidate Shigeyuki Mori
author_sort	Koji Takiwatari
title	Effect of Surface Roughness on Tribochemical Decomposition of Synthetic Oils under High-Vacuum Conditions
title_short	Effect of Surface Roughness on Tribochemical Decomposition of Synthetic Oils under High-Vacuum Conditions
title_full	Effect of Surface Roughness on Tribochemical Decomposition of Synthetic Oils under High-Vacuum Conditions
title_fullStr	Effect of Surface Roughness on Tribochemical Decomposition of Synthetic Oils under High-Vacuum Conditions
title_full_unstemmed	Effect of Surface Roughness on Tribochemical Decomposition of Synthetic Oils under High-Vacuum Conditions
title_sort	effect of surface roughness on tribochemical decomposition of synthetic oils under high-vacuum conditions
publisher	Japanese Society of Tribologists
publishDate	2019
url	https://doaj.org/article/2fc584143f0340db8620dafdd5908a02
work_keys_str_mv	AT kojitakiwatari effectofsurfaceroughnessontribochemicaldecompositionofsyntheticoilsunderhighvacuumconditions AT hidetakananao effectofsurfaceroughnessontribochemicaldecompositionofsyntheticoilsunderhighvacuumconditions AT yasushihoshi effectofsurfaceroughnessontribochemicaldecompositionofsyntheticoilsunderhighvacuumconditions AT michimasauchidate effectofsurfaceroughnessontribochemicaldecompositionofsyntheticoilsunderhighvacuumconditions AT shigeyukimori effectofsurfaceroughnessontribochemicaldecompositionofsyntheticoilsunderhighvacuumconditions
_version_	1718444400421371904

Effect of Surface Roughness on Tribochemical Decomposition of Synthetic Oils under High-Vacuum Conditions

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