This content is not included in your SAE MOBILUS subscription, or you are not logged in.
The Influence of Iron Salts and Blow-By Products Including Water and N 2 O On the Oxidation of Automotive Lubricants
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1988 by SAE International in United States
Annotation ability available
THE PENN STATE MICROOXIDATION TEST has been shown to be useful for the study of the influence of non-volatile compounds such as metal salts on the oxidative behavior of lubricants. A pressurized microoxidation test has been developed to evaluate the effects of water, NOx, and blow-by products on the stability of fully formulated motor oils. In this evaluation, H2O, N2O and metal salts of organic acids have been evaluated as single contaminants and in various combinations at test temperatures of 150°C and 175°C. In general, these studies show that water alone and in combination with the other contaminating products produces a substantial deposit under mild oxidation conditions such as oxidation at 175°C for less than ten hours. Under somewhat more severe conditions (175°C, time > 15 hours), relatively large amounts of soluble iron salts appear to dominate the deposition process. In a combination of all of the contaminants including the water, the water appears to dominate the early deposit-forming process. The presence of the other contaminants does not appear to affect the influence of water, although the water appears to limit or influence the deposition associated with these contaminants. In this test procedure, N2O does not appear to have a significant effect on the deposit formation alone or with other contaminants.
CitationDincher, T., Klaus, E., and Duda, J., "The Influence of Iron Salts and Blow-By Products Including Water and N2O On the Oxidation of Automotive Lubricants," SAE Technical Paper 881617, 1988, https://doi.org/10.4271/881617.
- Klaus E. E. Tewksbury E. J. “Microoxidation Studies With Functional Fluids,” Lub. Engr. 29 5 205 11 1973
- Lahijani J. Lockwood F. E. Klaus E. E. “The Influence of Metals on Sludge Formation,” ASLE Trans. 25 1 25 32 1982
- Lockwood F. Klaus E. E. “Ester Oxidation--The Effect of an Iron Surface,” ASLE Trans. 25 2 236 44 1982
- Clark D. B. Klaus E. E. Hsu S. M. “The Role of Iron and Copper in the Oxidative Degradation of Lubricating Oils,” Lub. Engr. 41 5 87 230 1385
- Klaus E. E. Ugwuzor D. I. Naidu S. K. Duda J. L. “Lubricant Metal Interaction Under Conditions Simulating Automotive Bearing Lubrication,” Proceedings of the JSLE International Tribology Conference 64 859 Tokyo, Japan July 1985
- Ku C. S. Hsu S. M. “A Thin-Film Oxygen Uptake Test for the Evaluation of Automotive Crankcase Lubricants,” Lub. Engr. 40 2 74 83 1984
- Klinkhamar M. D. “Short-Term Tests to Assess Marine Steam Turbine and Diesel Lubricating Oils,” SAE Paper No. 851251 Zuidema H. H. “Oxidation of Lubricating Oils,” Chem. Revs. 38 197 226 1946
- Cecil R. “High-Temperature Thickening of Motor Oils,” J. Inst. Petro. 59 201 210 1973
- Cho L. F. Klaus E. E. “Microoxidation Evaluation of Automotive Crankcase Oils,” SAE Sp. Pub. 558 1 23 1983
- Klaus E. E. Shah P. Krishnamachar V. “Development and Use of the Microoxidation Test With Crankcase Oils,” Proceedings of the Conference on Measurements and Standards for Recycled Oil The National Bureau of Standards September (1982)
- Oliphant T. L. Klaus E. E. “Estimating Engine High-Temperature Operating Severity Using Evaporation Modeling,” Lubr. Engr. 43 9 745 751 1987
- Klaus E. E. Cho L. Dang H. “Adaptation of the Penn State Microoxidation Test for the Evaluation of Automotive Lubricants,” SAE Paper No. 801362 83 92 1980
- Perez J. M. Kelley F. A. Klaus E. E. Bagrodia V. “Development and Use of the PSU Microoxidation Test for Diesel Engine Oils,” SAE Paper No. 872028 Toronto, Canada November 1987
- Shen S. Y. Klaus E. E. “A Kinetic Study of Oil Oxidation in Concentrated Contacts,” ASLE Trans. 277 1 45 52 1984
- Klaus Bailey J. L. “Evaluation of Some Poly-Alpha Olefins in a Pressurized Penn State Microoxidation Test,” Lub. Engr. 43 8 529 635 1987
- Naidu S. K. Klaus E. E. Duda J. L. “Kinetic Model for High-Temperature Oxidation of Lubricants,” Ind. Eng. Chem. Prod. 25 596 603 1986