ASTM D2619-95

Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)

SCOPE
1.1 This test method covers the determination of the hydrolytic stability of petroleum or synthetic-base hydraulic fluids.
Note 1—Water-base or water-emulsion fluids can be evaluated by this test method but are run "as is." Additional water is not added to the 100-g sample.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are provided for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in 3.1, 6.1, 6.3, 6.4, and Annex A1.

General Information

• Status: Historical
• Publication Date: 31-Dec-1994
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants

Relations

• Replaced By: ASTM D2619-95(2002)e1 - Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)
• Effective Date: 01-Jan-1995

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: D 2619 – 95 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle
1
Method)
This standard is issued under the fixed designation D 2619; 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 (e) indicates an editorial change since the last revision or reapproval.
200 kPa (2 atm) of air and water vapor at temperatures up to 93°C, a full
1. Scope
face shield and heavy woven fabric gloves should be worn when handling
2
1.1 This test method covers the determination of the
or working with the heated and sealed sample container.
hydrolytic stability of petroleum or synthetic-base hydraulic
fluids. 4. Significance and Use
4.1 This method differentiates the relative stability of hy-
NOTE 1—Water-base or water-emulsion fluids can be evaluated by this
test method but are run “as is.” Additional water is not added to the 100-g draulic fluids in the presence of water under the conditions of
sample.
the test. Hydrolytically unstable hydraulic fluids form acidic
and insoluble contaminants which can cause hydraulic system
1.2 The values stated in SI units are to be regarded as the
malfunctions due to corrosion, valve sticking, or change in
standard. The inch-pound units given in parentheses are
viscosity of the fluid. The degree of correlation between this
provided for information only.
test and service performance has not been fully determined.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
5.1 Air Oven, convection, adjusted to 93 6 0.5°C (200 6
priate safety and health practices and determine the applica-
4
1°F).
bility of regulatory limitations prior to use. Specific hazard
5
5.2 Pressure-Type Beverage Bottles, 200 mL (7-oz).
statements are given in Note 2, Note 3, Note 4, Note 5 and
5.3 Capping Press, for bottles.
Annex A1.
5.4 Rotating Mechanism, for holding bottles and rotating
2. Referenced Documents
end over end at 5 rpm in oven.
5.5 Centrifuge, 1500 rpm.
2.1 ASTM Standards:
5.6 Centrifuge Tubes, cone-shaped, 100-mL.
D 445 Test Method for Kinematic Viscosity of Transparent
6
5.7 Filtration Assembly, stainless screen/glass, membrane
and Opaque Liquids (and the Calculation of Dynamic
3
type 47-mm diameter.
Viscosity)
5.8 Typewriter Brush.
D 974 Test Method for Acid and Base Number by Color-
3
5.9 Separatory Funnel, 125-mL.
Indicator Titration
5.10 Microscope, for 203 magnification.
3. Summary of Test Method
5.11 Balance, sensitive to 0.2 mg.
5.12 Caps, for sealing bottles.
3.1 The sample of 75 g of fluid plus 25 g of water and a
7
5.13 Inert Seal, for cap gasket.
copper test specimen are sealed in a pressure-type beverage
8
5.14 Membrane Type Filter, cellulosic, 5-μm porosity,
bottle. The bottle is rotated, end for end, for 48 h in an oven at
47-mm diameter.
93°C (200°F). Layers are separated, and insolubles are
weighed. Weight change of copper is measured. Viscosity and
6. Reagents and Materials
acid number changes of fluid and acidity of water layer are
6.1 n-Heptane.
determined.
NOTE 2—Precaution: In addition to other precautions, because this test
method involves the use of a glass bottle that may contain approximately
4
An acceptable commercial unit is available from Falex Corp. 1020 Airpark Dr.,
Sugar Grove, IL 60554.
5
1
A 200-mL (7-oz) glass Coca Colat bottle has proven satisfactory. Bottles can
This test method is under the jurisdiction of ASTM Committee D-2 on
be obtained from beverage distributors.
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee
6
A Millipore XX10 047 30 or equivalent has proven satisfactory.
D02.N0.08on Stability.
7
A 0.127-mm (0.005-in.) thick fluorocarbon seal has proven satisfactory.
Current edition approved Jan. 15, 1995. Published March 1995. Originally
e1 8
published as D 2619 – 67. Last previous edition D 2619 – 88 (1994) . A Millipore SMWP 04700 or (5.0-μm porosity) or equivalent has proven
2
This test method is a modification of Federal Test Method Standard No. 791a, satisfactory. If there is a test fluid filter material incompatibility a fluorocarbon
Method 3457 for Hydrolytic Stability. membrane may be used. A Millipore FSLW 04700 (3.0-μm or equivalent porosity)
3
Annual Book of ASTM Standards, Vol 05.01. has proven satisfactory for example with phosphate ester fluids.
1

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D 2619
NOTE 3—Warning: Flammab
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