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ASTM F862-11(2017)

(Practice)

Standard Practice for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids

Standard Practice for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids

SIGNIFICANCE AND USE
4.1 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 non-corrosiveness of the fluidic system.
SCOPE
1.1 This practice covers the measurement of the pH and chloride ion of water extraction of aerospace hydraulic fluids.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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.  
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.

General Information

Status
Historical
Publication Date
31-May-2017
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

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ASTM F862-11(2017) - Standard Practice for pH and Chloride-ion Concentration of Aerospace Hydraulic FluidsASTM F862-11(2017) - Standard Practice for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 − 11 (Reapproved 2017)
Standard Practice for
pH and Chloride-ion Concentration of Aerospace Hydraulic
Fluids
ThisstandardisissuedunderthefixeddesignationF862;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 The quantity of the chloride ion is determined using a
chloride selective ion electrode and a selective ion meter.
1.1 This practice covers the measurement of the pH and
chloride ion of water extraction of aerospace hydraulic fluids.
4. Significance and Use
1.2 The values stated in SI units are to be regarded as
4.1 On application of the hydraulic fluid within the me-
standard. No other units of measurement are included in this
chanical fluidic system, the fluid may become contaminated
standard.
with acid and chloride ion. Mechanical shearing of the hydrau-
1.3 This standard does not purport to address all of the
lic fluid in the presence of the minute quantity of water and
safety concerns, if any, associated with its use. It is the
residual amount of organic solvents, used in cleaning, may
responsibility of the user of this standard to establish appro-
initiate formation of acid and chloride ion. Measurements are
priate safety and health practices and determine the applica-
desired to control and maintain the cleanliness and non-
bility of regulatory limitations prior to use.
corrosiveness of the fluidic system.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard- 5. Apparatus
ization established in the Decision on Principles for the
5.1 Combination pH Selective Ion Meter,
Development of International Standards, Guides and Recom-
5.2 Glass Electrode—The pH response shall be 60.05 pH.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. 5.3 Reference Electrode—A calomel, silver/silver chloride,
or other reference electrode of constant potential.
2. Referenced Documents
5.4 Chloride Selective Ion Electrode.
2.1 ASTM Standards:
5.5 Double Junction Reference Electrode, sleeve-type
D512 Test Methods for Chloride Ion In Water
5.6 Separatory Funnel, 250 mL.
D1193 Specification for Reagent Water
E70 Test Method for pH of Aqueous Solutions With the
6. Reagents
Glass Electrode
6.1 Water, reagent grade, Type IV, in accordance with
Specification D1193.
3. Summary of Method
6.2 Reference Buffer Solutions, SRM/RM 185, 186,
3.1 The aerospace hydraulic fluid sample is shaken with
and 187—Materials supplied by the National Institute of Stan-
water, and the pH and the quantity of chloride ion are
dards and Technology with pH values.
determined from the water layer.
3.1.1 The pH is measured using a glass electrode and pH
7. Standardization of pH Meter
meter.
7.1 Standardize the pH meter in accordance with Test
Method E70.
This practice is under the jurisdiction of ASTM Committee F07 on Aerospace
PART A—pH MEASUREMENT
and Aircraft and is the direct responsibility of Subcommittee F07.07 on Qualifica-
tion Testing of Aircraft Cleaning Materials.
CurrenteditionapprovedJune1,2017.PublishedJuly2017.Originallyapproved 8. Procedure
in 1984. Last previous edition approved in 2011 as F862 –11. DOI: 10.1520/F0862-
8.1 Add a 50-mL sample of hydraulic fluid and 50 mL of
11R17.
For referenced AST
...


This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F862 − 11 F862 − 11 (Reapproved 2017)
Standard Practice for
pH and Chloride-ion Concentration of Aerospace Hydraulic
Fluids
This standard is issued under the fixed designation F862; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice covers the measurement of the pH and chloride ion of water extraction of aerospace hydraulic fluids.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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.
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.
2. Referenced Documents
2.1 ASTM Standards:
D512 Test Methods for Chloride Ion In Water
D1193 Specification for Reagent Water
E70 Test Method for pH of Aqueous Solutions With the Glass Electrode
3. Summary of Method
3.1 The aerospace hydraulic fluid sample is shaken with water, and the pH and the quantity of chloride ion are determined from
the water layer.
3.1.1 The pH is measured using a glass electrode and pH meter.
3.1.2 The quantity of the chloride ion is determined using a chloride selective ion electrode and a selective ion meter.
4. Significance and Use
4.1 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 non-corrosiveness of the fluidic system.
5. Apparatus
5.1 Combination pH Selective Ion Meter,
5.2 Glass Electrode—The pH response shall be 60.05 pH.
5.3 Reference Electrode—A calomel, silver/silver chloride, or other reference electrode of constant potential.
5.4 Chloride Selective Ion Electrode.
5.5 Double Junction Reference Electrode, sleeve-type
This practice is under the jurisdiction of ASTM Committee F07 on Aerospace and Aircraft and is the direct responsibility of Subcommittee F07.07 on Qualification
Testing of Aircraft Cleaning Materials.
Current edition approved Dec. 1, 2011June 1, 2017. Published January 2012July 2017. Originally approved in 1984. Last previous edition approved in 20022011 as
F862 – 93 (2002)F862 which was withdrawn January 2011 and reinstated in December 2011. DOI: 10.1520/F0862-11. –11. DOI: 10.1520/F0862-11R17.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box
...

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