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ASTM D6022-19
Standard Practice for Calculation of Permanent Shear Stability Index
Přeložit název
NORMA vydána dne 1.12.2019
Informace o normě:
Označení normy: ASTM D6022-19
Datum vydání normy: 1.12.2019
Kód zboží: NS-980244
Počet stran: 4
Přibližná hmotnost: 12 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM D6022-19 :
Keywords:
permanent shear stability index, shear, shear stability index, viscosity loss,, ICS Number Code 17.060 (Measurement of volume, mass, density, viscosity)
Doplňující informace
| Significance and Use | ||||||||||||||||
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5.1 Permanent Shear Stability Index (PSSI) is a measure of the loss of viscosity, due to shearing, contributed by a specified additive. Note 2: For example, a PSSI of 50 means the additive will lose
50 % of the viscosity it contributes to the finished
oil.
5.2 The selection of appropriate base fluids and additive concentrations to be used in test oils is left to individual operators or companies. These choices will depend on the intended application for the additive. Note 3: PSSI may depend more strongly on base fluid, additive
concentration, additive chemistry, and the presence of other
additives for base fluids of unusual composition (for example,
esters) or if additives outside the common range of chemistries and
concentrations are used. Caution should be exercised when
interpreting results from different sources.
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| 1. Scope | ||||||||||||||||
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1.1 This practice specifies the procedure for the calculation of Permanent Shear Stability Index (PSSI) of an additive using viscosities before and after a shearing procedure. 1.2 PSSI is calculated for a single blend component and can then be used to estimate the effects of that component on finished lubricant blends. 1.3 This practice is applicable to many products and may use data from many different test methods. The calculation is presented in its most general form in order not to restrict its use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||||||||||||||
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