Petroleum and related products. Determination of the ageing behaviour of inhibited oils and fluids. TOST test. Part 1: Procedure for mineral oils (ISO 4263-1:2003)
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ISO 4263-1:2003 specifies a method for the determination of the ageing behaviour of rust- and oxidation- inhibited mineral oils having a density less than that of water, used as turbine oils (categories TSA, TGA, TSE, TGE of ISO 6743-5, hydraulic oils (categories HL, HM, HR, HV, HG of ISO 6743-4), and circulating oils (category CKB of ISO 6743-6). Oils containing synthetic components can be tested by this procedure, but no precision statement is available yet for such fluids. This test method is widely used in specifications and is considered of value in comparing the oxidation stability of oils that are prone to contamination with water. However, because of the large number of individual field service applications, the correlation between the results of this test and actual service performance can vary markedly, and is best judged on experience.
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Sisällysluettelo
Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
5 Apparatus
6 Sampling
7 Preparation of materials and apparatus
7.1 Cleaning catalysts
7.2 Preparation of catalyst coil
7.3 Catalyst storage
7.4 Cleaning new glassware
7.5 Cleaning used glassware
7.6 Cleaning aliquot-removal device
8 Procedure
9 Calculation
10 Expression of results
11 Precision
11.1 General
11.2 Repeatability, r
11.3 Reproducibility, R
11.4 Reproducibility with duplicate tests
12 Test report
Annex A Liquid-in-glass thermometer specifications (normative)
Annex B Procedure for packaging and storage of catalyst coils (normative)
Annex C Method for the determination of the insolubles content of mineral oils (informative)
Annex D Appearance rating of catalyst coil wires (informative)
Annex E Determination of metals content (informative)
ISO 3170:2004 Petroleum liquids -- Manual sampling
ISO 3696:1987 Water for analytical laboratory use -- Specification and test methods
ISO 6618:1997 Petroleum products and lubricants -- Determination of acid or base number -- Colour-indicator titration method
ISO 3170:2004 Petroleum liquids -- Manual sampling
ISO 3696:1987 Water for analytical laboratory use -- Specification and test methods
ISO 6618:1997 Petroleum products and lubricants -- Determination of acid or base number -- Colour-indicator titration method
ISO 6619:1988 Petroleum products and lubricants -- Neutralization number -- Potentiometric titration method
ISO 7537:1997 Petroleum products -- Determination of acid number -- Semi-micro colour-indicator titration method