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ASTM F862-93(2002)

(Test Method)

Standard Test Method for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids (Withdrawn 2011)

Standard Test Method for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids (Withdrawn 2011)

SIGNIFICANCE AND USE
On application of the hydraulic fluid within the mechanical fluidic system, the fluid may become contaminated with acid and chloride ion. Mechanical shearing of the hydraulic fluid in the presence of the minute quantity of water and residual amount of organic solvents, used in cleaning, may initiate formation of acid and chloride ion. Measurements are desired to control and maintain the cleanliness and noncorrosiveness of the fluidic system.
SCOPE
1.1 This test method covers the measurement of the pH and chloride ion of water extraction of aerospace hydraulic fluids.  
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.
WITHDRAWN RATIONALE
Rationale
This test method covers the measurement of the pH and chloride ion of water extraction of aerospace hydraulic fluids. Formerly under the jurisdiction of Committee F07 on Aerospace and Aircraft, this test method was withdrawn in July 2011. This standard is being withdrawn without replacement due to its limited use by industry.

General Information

Status
Historical
Publication Date
14-Jan-1993
Withdrawal Date
18-Jul-2011
ICS
49.080 - Aerospace fluid systems and components
Technical Committee
F07 - Aerospace and Aircraft
Drafting Committee
F07.07 - Qualification Testing of Aircraft Cleaning Materials
Current Stage
Ref Project

Relations

Replaces
ASTM F862-93(1998) - Standard Test Method for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids
Effective Date
15-Jan-1993
Replaced By
ASTM F862-11 - Standard Practice for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids
Effective Date
01-Dec-2011

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ASTM F862-93(2002) - Standard Test Method for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids (Withdrawn 2011)ASTM F862-93(2002) - Standard Test Method for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids (Withdrawn 2011)
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ASTM F862-93(2002) - Standard Test Method for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids (Withdrawn 2011)
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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:F862–93 (Reapproved 2002)
Standard Test Method for
pH and Chloride-ion Concentration of Aerospace Hydraulic
Fluids
ThisstandardisissuedunderthefixeddesignationF862;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Apparatus
1.1 This test method covers the measurement of the pH and 5.1 pH Meter, with expanded millivolt scale and a sensitiv-
chloride ion of water extraction of aerospace hydraulic fluids. ity of 1 mV. The method can be adopted for use with a
1.2 This standard does not purport to address all of the selective-ion meter.
safety concerns, if any, associated with its use. It is the 5.2 Glass Electrode—The pH response shall be 60.05 pH.
responsibility of the user of this standard to establish appro- 5.3 Reference Electrode—A calomel, silver/silver chloride,
priate safety and health practices and determine the applica- or other reference electrode of constant potential.
bility of regulatory limitations prior to use. 5.4 Silver/Silver Sulfide Electrode.
5.5 Double Junction Reference Electrode, sleeve-type.
2. Referenced Documents
5.6 Separatory Funnel, 250 mL.
2.1 ASTM Standards:
5.7 Buret, 10-mL capacity.
D1193 Specification for Reagent Water 5.8 Titration Stand,preferablybuiltasanintegralpartofthe
meterhousingandprovidedwithsupportfortheelectrodesand
3. Summary of Method
electrical stimer, all connected to ground.
3.1 The aerospace hydraulic fluid sample is shaken with
5.9 Gran’s Plot Paper.
water, and the pH and the quantity of chloride ion are
6. Reagents
determined from the water layer.
3.1.1 The pH is measured using a glass electrode and pH
6.1 Water, reagent grade, Type IV, in accordance with
meter. Specification D1193.
3.1.2 The quantity of the chloride ion is determined using a 6.2 Reference Buffer Solutions, Standards 185, 186,
silver/sulfide electrode and a specific ion meter.
and 187—Materials supplied by the National Bureau of Stan-
dards with pH values.
4. Significance and Use −3
6.3 Silver Nitrate Solution, Standard (2.82 310 M)—
4.1 On application of the hydraulic fluid within the me-
Dissolve4.7909gofsilvernitratedissolvedin1Lofwaterand
chanical fluidic system, the fluid may become contaminated
diluted 1:10.
withacidandchlorideion.Mechanicalshearingofthehydrau-
7. Standardization of pH Meter
lic fluid in the presence of the minute quantity of water and
residual amount of organic solvents, used in cleaning, may
7.1 Turn on the instrument, allow it to warm up thoroughly,
initiate formation of acid and chloride ion. Measurements are and bring it to electrical balance in accordance with the
desired to control and maintain the cleanliness and noncorro-
manufacturer’s instructions. Wash the glass and reference
siveness of the fluidic system. electrodes with three changes of water. Form a fresh liquid
junction if a sleeve-type reference junction is used.
7.2 Fill the sample cup with the first reference buffer
This test method is under the jurisdiction of ASTM Committee F07 on
solution and immerse the electrodes. If the pH meter is of the
Aerospace andAircraft and is the direct responsibility of Subcommittee F07.07 on
zero-nulltype,setthedialofthemetertoequalpHvalueofthe
Qualification Testing of Aircraft Cleaning Materials.
Current edition approved Jan. 15, 1993. Published April 1993. Originally
published as F862–84. Last previous edition F862–84. DOI: 10.1520/F0862-
93R02. The Orion Model 901 has been found satisfactory.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or The Orion Research Model has been found satisfactory.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM The Orion Model 90-01 has been found satisfactory.
Standards volume information, refer to the standard’s Document Summary page on Gran’s plot paper is available from Orion Research, Inc., 380 Putnam Ave.,
the ASTM website. Cambridge, MA 02139.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F862–93 (2002)
reference buffer solution. Engage the operating button and PART B—CHLORIDE-ION CONCENTRATION
rotate the standardization knob until the meter is brought to MEASUREMENT
balance. If the pH meter is of the direct-reading type, engage
the operating button, turn the range switch to the proper 12. Procedure
position, and rotate the asymmetry-potential knob until the
12.1 Adda100-mLsampleofhydraulicfluidand100mLof
reading corresponds to the pH of the reference buffer. Empty
reagent water to a 250-mL separatory f
...

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