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Standard Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus (Includes all amendments and changes 6/16/2020).
Přeložit název
NORMA vydána dne 1.6.2020
Označení normy: ASTM D6278-20a
Datum vydání normy: 1.6.2020
Kód zboží: NS-995321
Počet stran: 9
Přibližná hmotnost: 27 g (0.06 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
diesel injector apparatus, mechanical shear stability, polymer containing fluid, viscosity loss,, ICS Number Code 75.160.20 (Liquid fuels)
Significance and Use | ||||||||||
5.1 This test method evaluates the percent viscosity loss for polymer-containing fluids resulting from polymer degradation in the high shear nozzle device. Thermal or oxidative effects are minimized. 5.2 This test method is used for quality control purposes by manufacturers of polymeric lubricant additives and their customers. 5.3 This test method is not intended to predict viscosity loss in field service in different field equipment under widely varying operating conditions, which may cause lubricant viscosity to change due to thermal and oxidative changes as well as by the mechanical shearing of polymer. However, when the field service conditions, primarily or exclusively, result in the degradation of polymer by mechanical shearing, there may be a correlation between the results from this test method and results from the field. |
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1. Scope | ||||||||||
1.1 This test method covers the evaluation of the shear stability of polymer-containing fluids. The test method measures the percent viscosity loss at 100 °C of polymer-containing fluids when evaluated by a diesel injector apparatus procedure that uses European diesel injector test equipment. The viscosity loss reflects polymer degradation due to shear at the nozzle. Note 1: Test Method D2603 has been used for similar
evaluation of shear stability; limitations are as indicated in the
significance statement. No detailed attempt has been undertaken to
correlate the results of this test method with those of the sonic
shear test method.
Note 2: This test method uses test apparatus as defined in CEC
L-14-A-93. This test method differs from CEC-L-14-A-93 in the
period of time required for calibration.
Note 3: Test Method D5275 also shears oils in a diesel
injector apparatus but may give different results.
Note 4: This test method has different calibration and
operational requirements than withdrawn Test Method D3945.
Note 5: Test Method D7109 is a similar procedure that
measures shear stability at both 30 and 90 injection cycles. This
test method uses 30 injection cycles only.
1.2 The values stated in SI units are to be regarded as the standard. 1.2.1 Exception—Non-SI units are provided in parentheses. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to 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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