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  • ASTM
    D6022-06(2012) Standard Practice for Calculation of Permanent Shear Stability Index
    Edition: 2012
    $144.00
    Unlimited Users per year

Description of ASTM-D6022 2012

ASTM D6022 - 06(2012)

Standard Practice for Calculation of Permanent Shear Stability Index

Active Standard ASTM D6022 | Developed by Subcommittee: D02.07

Book of Standards Volume: 05.02




ASTM D6022

Significance and Use

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.

1. Scope

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.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D2603 Test Method for Sonic Shear Stability of Polymer-Containing Oils

D4485 Specification for Performance of Active API Service Category Engine Oils

D5119 Test Method for Evaluation of Automotive Engine Oils in the CRC L-38 Spark-Ignition Engine

D5275 Test Method for Fuel Injector Shear Stability Test (FISST) for Polymer Containing Fluids

D5621 Test Method for Sonic Shear Stability of Hydraulic Fluids

D6278 Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus

D7109 Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus at 30 and 90 Cycles

CEC Standards

CECL45 T 93 Viscosity Shear Stability of Transmission Lubricants (KRL)

Keywords

permanent shear stability index; shear; shear stability index; viscosity loss ;


ICS Code

ICS Number Code 17.060 (Measurement of volume, mass, density, viscosity)


DOI: 10.1520/D6022-06R12

ASTM International is a member of CrossRef.

ASTM D6022



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