Study on the Evaluation Method of Sludge Formation during the Oxidation Process of Gear Oils

Generally synthetic gear oils have superior oxidation stability compared to mineral gear oils, although there is a concern that the oil life may depend on the sludge formation during its oxidation process. In the methods of ASTM D2893 or ASTM D5763 which are commonly used as oxidation tests of gear...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Akihiko Yano, Yo Akiyama, Miharu Matsuoka, Kazufumi Takayanagi
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2013
Materias:	gear oil synthetic oil oxidation degradation sludge 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/a099f1e844394800be39722fb6886fcf
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:a099f1e844394800be39722fb6886fcf
record_format	dspace
spelling	oai:doaj.org-article:a099f1e844394800be39722fb6886fcf2021-11-05T09:24:23ZStudy on the Evaluation Method of Sludge Formation during the Oxidation Process of Gear Oils1881-219810.2474/trol.8.162https://doaj.org/article/a099f1e844394800be39722fb6886fcf2013-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/8/2/8_162/_pdf/-char/enhttps://doaj.org/toc/1881-2198Generally synthetic gear oils have superior oxidation stability compared to mineral gear oils, although there is a concern that the oil life may depend on the sludge formation during its oxidation process. In the methods of ASTM D2893 or ASTM D5763 which are commonly used as oxidation tests of gear oils, the test duration for degradation is specified 312 hours. Considering the evaluation to select synthetic gear oils, the test duration is too short to find the significant difference since the degradation of synthetic gear oils would be minimal. The authors provide a new method, in which gear oils are oxidized and degraded by modified dry-TOST (dry-Turbine Oil Oxidation Stability Test) method without catalysts, and use the RPVOT (Rotating Pressure Vessel Oxidation Test) residual ratio as the newly introduced degradation index. This study shows the RPVOT residual ratio has a correlation with changes of kinematic viscosity or acid number which are generally used as the degradation index, and also presents that degradation tendency of the gear oils can be classified by the relationship graph between RPVOT residual ratio and sludge quantity.Akihiko YanoYo AkiyamaMiharu MatsuokaKazufumi TakayanagiJapanese Society of Tribologistsarticlegear oilsynthetic oiloxidationdegradationsludgePhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 8, Iss 2, Pp 162-170 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	gear oil synthetic oil oxidation degradation sludge Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	gear oil synthetic oil oxidation degradation sludge Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Akihiko Yano Yo Akiyama Miharu Matsuoka Kazufumi Takayanagi Study on the Evaluation Method of Sludge Formation during the Oxidation Process of Gear Oils
description	Generally synthetic gear oils have superior oxidation stability compared to mineral gear oils, although there is a concern that the oil life may depend on the sludge formation during its oxidation process. In the methods of ASTM D2893 or ASTM D5763 which are commonly used as oxidation tests of gear oils, the test duration for degradation is specified 312 hours. Considering the evaluation to select synthetic gear oils, the test duration is too short to find the significant difference since the degradation of synthetic gear oils would be minimal. The authors provide a new method, in which gear oils are oxidized and degraded by modified dry-TOST (dry-Turbine Oil Oxidation Stability Test) method without catalysts, and use the RPVOT (Rotating Pressure Vessel Oxidation Test) residual ratio as the newly introduced degradation index. This study shows the RPVOT residual ratio has a correlation with changes of kinematic viscosity or acid number which are generally used as the degradation index, and also presents that degradation tendency of the gear oils can be classified by the relationship graph between RPVOT residual ratio and sludge quantity.
format	article
author	Akihiko Yano Yo Akiyama Miharu Matsuoka Kazufumi Takayanagi
author_facet	Akihiko Yano Yo Akiyama Miharu Matsuoka Kazufumi Takayanagi
author_sort	Akihiko Yano
title	Study on the Evaluation Method of Sludge Formation during the Oxidation Process of Gear Oils
title_short	Study on the Evaluation Method of Sludge Formation during the Oxidation Process of Gear Oils
title_full	Study on the Evaluation Method of Sludge Formation during the Oxidation Process of Gear Oils
title_fullStr	Study on the Evaluation Method of Sludge Formation during the Oxidation Process of Gear Oils
title_full_unstemmed	Study on the Evaluation Method of Sludge Formation during the Oxidation Process of Gear Oils
title_sort	study on the evaluation method of sludge formation during the oxidation process of gear oils
publisher	Japanese Society of Tribologists
publishDate	2013
url	https://doaj.org/article/a099f1e844394800be39722fb6886fcf
work_keys_str_mv	AT akihikoyano studyontheevaluationmethodofsludgeformationduringtheoxidationprocessofgearoils AT yoakiyama studyontheevaluationmethodofsludgeformationduringtheoxidationprocessofgearoils AT miharumatsuoka studyontheevaluationmethodofsludgeformationduringtheoxidationprocessofgearoils AT kazufumitakayanagi studyontheevaluationmethodofsludgeformationduringtheoxidationprocessofgearoils
_version_	1718444363926732800

Study on the Evaluation Method of Sludge Formation during the Oxidation Process of Gear Oils

Ejemplares similares