This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Study of Pneumatic Rubber Valves Degradation by Formation of Esters in “Fresh” and “Used” Lubricating Oil
Annotation ability available
Sector:
Language:
English
Abstract
A great deal of problems occurring with several commercial vehicle marks world-wide is the frequent failure in rubber material of the pneumatic rubber of brake circuits. The most frequent fails observed in the field are: valves stuck, rubber wear off, rubber rupture and softening degradation. In order to determine the causes, studies were developed in laboratory following the formation of esters, searching for its effects and submitting the pneumatic rubber valves to direct contact and finally comparing the data with valves aged on the field.
Recommended Content
Authors
- Noel Massinhan Levy - COPEL - Companhia Paranaense de Energia
- Carlos Mathias Becker - Volvo do Brasil Veículos Ltda
- Mauricio Pereira Cantão - LAC - Laboratório Central de Pesquisa e Desenvolvimento (Convênio UFPR/COPEL)
- Paulo Roberto Janissek - LAC - Laboratório Central de Pesquisa e Desenvolvimento (Convênio UFPR/COPEL)
Citation
Levy, N., Becker, C., Cantão, M., and Janissek, P., "Study of Pneumatic Rubber Valves Degradation by Formation of Esters in “Fresh” and “Used” Lubricating Oil," SAE Technical Paper 973128, 1997, https://doi.org/10.4271/973128.Also In
References
- KLAMANN, D. “Lubricants and Related Products” Verlag Chemie Weinheim-Germany 44 45 177 196 1984
- DENISON, G.H. CLAYTON, J.O. SAE Journal 53 264 1945
- JAYNES, S.E. SALOMON, M.F. RIGA, A.T. KORNBREKKE, R.E. DAVIS, K.E. “Investigations of Lubricant Sludge Formation in the Field: Development of an Effective New Fleet Test Technique” Technical Paper Series N o 910748 SAE 1991
- GRAF, R.T. COPAN, W.G. KORNBREKKE, R.E. MURPHY, J.P. “Sludge Formation in Engine Testing and Field Service” Technical Paper Series, N o 881580 SAE 1988
- BARNES, L.D. “Evaluation of Elastomeric Compounds in ‘Fresh’ and ‘Used’ CG-4 Engine Oils” Technical Paper Series N o 961226 SAE 1996
- PEREZ, J.M. PEI, P. ZHANG, Y. HSU, S.M. “Diesel Deposit Forming Tendencies - Microanalysis Methods” Technical Paper Series N o 910750 SAE 1991
- AMERICAN SOCIETY FOR TESTING and MATERIALS - ASTM “Standard test method D 2272 - Oxidation Stability of Steam Turbine Oils by Rotating Bomb” 05.01 765 772 1995
- INTERNATIONAL ELECTROTECHNICAL COMMISSION - IEC “Standard test method 74 and 474 - Method for assessing the oxidation stability of insulating oils and Test method for oxidation stability of inhibited mineral insulating oils” 1974
- SOLOMONS, T.W.G. “Organic Chemistry” John Wiley & Sons 6th New York 812 815 1996
- HERGUTH, W.R. PHILLIPS, S. “Comparison of Common Analytical Techniques to Voltammetric Analysis of Antioxidants in Industrial in Industrial Lubricating Oils” Herguth Laboratories, Inc. 1995 CAMPBELL, T.W. COPPINGER, G.N. “The Reaction of t-Butyl Hydroperoxide with Some Phenols” J. Am. Chem. Soc. 74 1469 1471 1952
- ASTM STANDARD D 2982 - 93 “Standard Test Method for Detecting Glycol-Base Antifreeze in Used Lubricant Oils” 05.02 255 258 1993
- INTERCONECTED OPERATION COORDINATOR GROUP MAINTENANCE SUBCOMMITTEE Physical-Chemistry Study Commission “Analysis Recommendation and Sludge Control in Lubricating Oil” 1988