Oxidation and the Testing of Turbine Oils PDF Download
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Author: Cyril A. Migdal
Publisher: ASTM International
ISBN: 0803134932
Category : Antioxidants
Languages : en
Pages : 929
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Book Description
This work presents papers from a December 2005 symposium held in Norfolk, Virginia, and sponsored by ASTM Committee D2 on Petroleum Products and Lubricants and its Subcommittees D02.09 on Oxidation and D02.C0 on Turbine Oils. Contributors include equipment manufacturers, end users, lubricant producers, lubricant additive suppliers, test equipment manufacturers, and standard test method developers. They share information on industry trends, evolving technologies, and changing equipment designs and operating conditions, with a focus on how these factors impact oxidation. Some topics covered include turbine oil performance limits, a new form of the rotating pressure vessel oxidation test, and degradation mechanisms leading to sludge and varnish in modern turbine oil formulations. B&w photos are included. There is no subject index. Migdal is affiliated with Chemtura Corporation.
Author: Cyril A. Migdal
Publisher: ASTM International
ISBN: 0803134932
Category : Antioxidants
Languages : en
Pages : 929
Get Book Here
Book Description
This work presents papers from a December 2005 symposium held in Norfolk, Virginia, and sponsored by ASTM Committee D2 on Petroleum Products and Lubricants and its Subcommittees D02.09 on Oxidation and D02.C0 on Turbine Oils. Contributors include equipment manufacturers, end users, lubricant producers, lubricant additive suppliers, test equipment manufacturers, and standard test method developers. They share information on industry trends, evolving technologies, and changing equipment designs and operating conditions, with a focus on how these factors impact oxidation. Some topics covered include turbine oil performance limits, a new form of the rotating pressure vessel oxidation test, and degradation mechanisms leading to sludge and varnish in modern turbine oil formulations. B&w photos are included. There is no subject index. Migdal is affiliated with Chemtura Corporation.
Author: Emily R. Schneller
Publisher:
ISBN:
Category : Antioxidant
Languages : en
Pages : 20
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Book Description
The current turbine oil oxidation bench tests have been in place for many years. Recently, however, the basestocks used to formulate these lubricants have changed significantly. Traditional basestocks, containing high levels of aromatics and sulfur, have been substantially displaced by more highly refined basestocks, which have very low levels of aromatics and almost no sulfur. Over time it has become clear that the oxidation performance of the different basestock classes is quite different. One key question, however, remains unanswered, "What modifications are required in current bench tests to adequately mimic oxidation processes in modern turbine lubricants?" In order to adequately address this critical question, the fundamentals of lubricant oxidation and stabilization will be discussed. Data will be presented on the oxidation of different basestocks under varying conditions of temperature, metal catalysts and antioxidant type, using model bulk oil oxidation tests. The data highlights the fundamental oxidation mechanisms that can occur in turbine oil systems and new test methods are proposed.
Author: VJ. Gatto
Publisher:
ISBN:
Category : Active oxygen
Languages : en
Pages : 20
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Book Description
The current turbine oil oxidation bench tests have been in place for many years. Recently, however, the basestocks used to formulate these lubricants have changed significantly. Traditional basestocks, containing high levels of aromatics and sulfur, have been substantially displaced by more highly refined basestocks, which have very low levels of aromatics and almost no sulfur. Over time it has become clear that the oxidation performance of the different basestock classes is quite different. One key question, however, remains unanswered. "What modifications are required in current bench tests to adequately mimic oxidation processes in modern turbine lubricants?" In order to adequately address this critical question, the fundamentals of lubricant oxidation and stabilization will be discussed. Data will be presented on the oxidation of different basestocks under varying conditions of temperature, metal catalysts and antioxidant type, using model bulk oil oxidation tests. The data highlights the fundamental oxidation mechanisms that can occur in turbine oil systems and new test methods are proposed.
Author: Committee C Staff
Publisher: ASTM International
ISBN:
Category : Gas-turbines
Languages : en
Pages : 121
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Book Description
Author: Marc Ribeaud
Publisher:
ISBN:
Category : Acid number
Languages : en
Pages : 8
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Book Description
Four turbine oils formulated with varying types and concentrations of antioxidants were aged via D 943 exposure and examined extensively at 1000, 2000, 5000, and 10 000 h. Acid number, Rotary Pressure Vessel Oxidation Test (RPVOT), High Pressure Differential Scanning Calorimetry (HPDSC)RP, and sludge determinations were made at each time interval. Only a combined evaluation of the test results for the 10 000 h oil samples (a "Total Oxidation Products" approach) gave a reasonable estimation of the true oxidative state of the fluids. One shorter term test, ASTM D 6514, was found to give a fair prediction of the overall quality of the fluids at 10 000 h.
Author: DE. Chasan
Publisher:
ISBN:
Category : Acid number
Languages : en
Pages : 9
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Book Description
Four turbine oils formulated with varying types and concentrations of antioxidants were aged via D 943 exposure and examined extensively at 1000, 2000, 5000, and 10 000 h. Acid number, Rotary Pressure Vessel Oxidation Test (RPVOT), High Pressure Differential Scanning Calorimetry (HPDSC)RP, and sludge determinations were made at each time interval. Only a combined evaluation of the test results for the 10 000 h oil samples (a "Total Oxidation Products" approach) gave a reasonable estimation of the true oxidative state of the fluids. One shorter term test, ASTM D 6514, was found to give a fair prediction of the overall quality of the fluids at 10 000 h.
Author: T. W. Selby
Publisher:
ISBN:
Category : Dry-bath RPVOT.
Languages : en
Pages : 9
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Book Description
The importance of oxidation-resistant turbine oils in the various applications in which turbines are used is difficult to understate. Turbines in themselves are very costly energy-converting mechanisms which, among many other applications, provide much of the electricity for the power grids of modern society. Most critical to these turbines are the lubricants that are essential to their operation in long, dependable service. Equally critical, then, are the tests that determine the acceptability of these turbine oils and the understanding of the oxidation mechanisms that cause these oils to form deposits and otherwise lose their ability to properly lubricate the turbine. This paper is a first report on a new dry-bath approach to not only determine antioxidation characteristics of turbine oils in the well-known Rotating Pressure Vessel Oxidation Test (RPVOT) but to enable the direct study and modification of the oxidation process as it occurs. The instrument not only eliminates the hot oil-bath associated with the RPVOT but also allows the test fluid to be available for direct monitoring of temperature, chemical content, and the effects of injecting reactants. In the process of gathering the preliminary information for this paper, it was found that significant exotherms may develop in the turbine oil at a critical stage of oxidation response. These exotherms can vary in duration and temperature rise depending on the nature of the antioxidant system and other properties of the formulated turbine oil. Moreover, the fact that these exotherms seem to mark a certain level of the oxidation process, brings the opportunity to more thoroughly investigate and understand oxidation processes as well as the chemistries of other lubricants.
Author: Brian T. Thompson
Publisher:
ISBN:
Category : Anti-oxidants
Languages : en
Pages : 18
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Book Description
One of the primary factors in determining the life and performance of turbine oils is its oxidation stability. Oxidation can cause a host of problems for in-service turbine oils, such as sludge, deposits, lacquer, and varnish formation. There is limited published research on the performance of turbine oils once oxidation begins. This paper presents data on the relationship between several turbine oil characteristics during the oxidation process by focusing on the measurable physical and chemical changes that occur. Five turbine oils were chosen, each employing different antioxidants and base oil refining technologies to represent a typical selection of commercially available turbine oils. A 49-day experiment was completed in which the oils were subjected to a controlled and accelerated oxidative process under laboratory conditions. Throughout the testing period, samples were drawn and a range of chemical, physical, and performance tests were performed. The data obtained from this experiment identify several correlations that relate to the performance of each oil. These data are useful in understanding the relationship between turbine oil oxidation and fluid performance and will help end-users in selecting and optimizing their turbine lubricant.
Author: American Society for Testing and Materials
Publisher:
ISBN:
Category : Lubricating oils
Languages : en
Pages : 5
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Book Description
Author: H. K. Zobel
Publisher:
ISBN:
Category : Acid number
Languages : en
Pages : 11
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Book Description
Traditionally, long established oxidation tests such as TOST (ASTM D 943-03) and RPVOT (ASTM D 2272-02) in combination with the acid number (ASTM D 974-03) test has been used to screen the oxidation stability of turbine oils. Lately, nevertheless, a new voltammetric method has been applied to measure the remaining useful life (RUL) of turbine oils, RULERTM (ASTM D 6971-03) as it uses microlitre amounts of sample and needs only a short testing time. The aim of this study is to examine the correlation between the RULERTM voltammetric test in comparison to the standing oxidation turbine methods, TOST and RPVOT.Three fully formulated commercially available oils were studied; two were based on synthetic esters and one was mineral oil based. In addition, other oils were tested in our laboratories in Norway and Sweden in order to investigate the correlation between RULERTM and RPVOT oxidation stability tests. Field samples were also used to evaluate those methods.Although those studies have been worthwhile, reaching a definite conclusion regarding correlations has proven to be somewhat difficult. It is clear, however, that by a careful methodology, a useful correlation for the investigated oil types may be obtained. For example, guide limits for RULERTM results and their correlation to RPVOT values were established.
