ASTM D6022 - 19 - Standard Practice for Calculation of Permanent Shear Stability Index

ASTM D6022 - 19

Standard Practice for Calculation of Permanent Shear Stability Index

Status : Current   Published : December 2019



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.

Standard NumberASTM D6022 - 19
TitleStandard Practice for Calculation of Permanent Shear Stability Index
Publication Date01 December 2019
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors permanent shear stability index, shear, shear stability index, viscosity loss
File Size77 KB

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