ASTM D3945-93

Standard Test Methods for Shear Stability of Polymer-Containing Fluids Using a Diesel Injector Nozzle (Withdrawn 1998)

SCOPE
1.1 These test methods measure the percent viscosity loss at 100°C of polymer-containing fluids when evaluated by either of two diesel injector apparatus procedures. Procedure A uses European Diesel Injector Test Equipment and Procedure B uses Fuel Injector Shear Stability Test (FISST) equipment. The viscosity loss reflects polymer degradation due to shear at the nozzle.  Note 1-ASTM Test Method D2603 has been used for similar evaluation of this property. It has many of the same limitations as indicated in the significance statement. No detailed attempt has been undertaken to correlate the results by the sonic and the diesel injector methods. Equipment and replacement parts are no longer available for Test Method D2603. Note 2-Procedure A of this method uses test apparatus as defined in CEC L-14-A-79, IP 294/76 and DIN 51382. The operational procedure is different on four specific points. Procedure A evaluates hydraulic-type fluids at 30 cycles, with viscosities measured at 100°C. Results are reported for single determinations. No equipment severity correction factor is used to adjust results.
1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1992
• ICS: 75.100 - Lubricants, industrial oils and related products
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.07.0B - High Temperature Rheology of Non-Newtonian Fluids

Standards Content (Sample)

ASTM D3945 93 W 0759530 0528424 35T
(m Designation: D 3945 - 93 AMERICAN SOCIETY FOR TESllNG AND MATERIALS
An American Natii Standard
1916 Race St Philadelphia, Pa 19103
Reprinted from the Annual Book of ASTM Standards. Copyrbht
ASTM
If not listed in the current combined index, will appear in the next
edition
Standard Test Methods for
Shear Stability of Polymer-Containing Fluids Using a Diesel
Injector Nozzle'
This standard is issued under the fixed designation D 3945; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (c) indicates an editorial change since the last revision or reapproval.
NOTE-R~~~~UXS A and B of this method are in the process of being revised as separate ASTM Test Methods because tests of a series
of polymer-containing fluids showed that the two procedures often give different results.
1. scope The reduction in kinematic viscosity, reported as percent loss
of the initial kinematic viscosity, is a measure of the shear
1.1 These test methods measure the percent viscosity loss
stability of the polymercontaining fluid.
at 100°C of polymer-containing fluids when evaluated by
either of two diesel injector apparatus procedures. Procedure
4. Significance and Use
A uses European Diesel Injector Test Equipment and
Procedure B uses Fuel Injector Shear Stability Test (FISST) 4.1 Both Procedure A (using European Diesel Injector
Test Equipment) and Procedure B (using Fuel Injector Shear
equipment. The viscosity loss reflects polymer degradation
Stability Test - FISST - equipment) of this method evaluate
due to shear at the nozzle.
the percent viscosity loss for polymer-containing fluids
NOTE 1-ASTM Test Method D2603 has been used for similar
resulting from polymer degradation in the high shear nozzle
evaluation of this property. It has many of the same limitations as
device. Minimum interference from thermal or oxidative
indicated in the significance statement. No detailed attempt has been
undertaken to correlate the results by the sonic and the diesel injector
effects would be anticipated. The two procedures exhibit
methods. Equipment and replacement parts are no longer available for
essentially equal percent viscosity loss for each oil used in
Test Method D 2603.
developing the method. Both procedures also show essen-
NOTE 2-Procedure A of this method uses test apparatus as defined
tially comparable repeatability and reproducibility.
in CEC G14-A-79, IP 294/76 and DIN 51382. The operational
4.2 These methods are not intended to predict viscosity
procedure is Merent on four specific points. Procedure A evaluates
loss in field service for different polymer classes or for
hydraulic-type fluids at 30 cycles, with viscosities measured at 100°C.
different field equipment. However, it may be possible to
Results are reported for single determinations. No equipment severity
correction factor is used to adjust results.
establish some correlation for a specific polymer type in
specific field equipment.
1.2 This standard does not purport to address all of the
safety problems, if any, associated with its use. It is the
PROCEDURE A-EUROPEAN DIESEL INJECTOR TEST
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Apparatus
bility of regulatory limitations prior to use.
5.1 The apparatus basically consists of a fluid reservoir, a
double-plunger pump with an electric motor drive, an
2. Referenced Documents
atomization chamber with a diesel injector spray nozzle and
2.1 ASTM Standards:
a fluid cooling vessel, installed in an area with an ambient
D445 Test Method for Kinematic Viscosity of Trans-
temperature of 20 to 25°C (68 to 77°F). Figure A1.1, Annex
parent and Opaque Liquids (and the Calculation of
A 1 , shows the schematic representation of eq~ipment.~
Dynamic Viscosity)z
5.1.1 Fluid Reservoir, (7) in Fig. A 1.1 Annex A 1 , is open
D 2603 Test Method for Sonic Shear Stability of Polymer-
on the top, has a capacity of about 250 cm3, has a 45-mm
Containing Oils3
(1.772-in.) inner diameter and is calibrated in 25-cm3
intervals. It is fitted with an internal fluid distributor detailed
3. Summary of Test Method
as Fig. A 1.2. A 40-mm (1 S75-in.) diameter watch glass with
3.1 The polymer-containing fluid is passed through a
serrated edges is an acceptable distributor plate. The distrib-
diesel injector nozzle at a shear rate that causes the less shear
utor reduces the tendency of fluid channeling.
...