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ASTM F862-11(2022)

(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, health, and environmental 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
Published
Publication Date
30-Apr-2022
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

Refers
ASTM E70-24 - Standard Test Method for pH of Aqueous Solutions With the Glass Electrode
Effective Date
01-Jan-2024
Refers
ASTM E70-07(2015) - Standard Test Method for pH of Aqueous Solutions With the Glass Electrode
Effective Date
01-Jun-2015
Refers
ASTM D512-10 - Standard Test Methods for Chloride Ion In Water
Effective Date
15-Sep-2010
Refers
ASTM D1193-06 - Standard Specification for Reagent Water
Effective Date
01-Mar-2006
Refers
ASTM D512-04 - Standard Test Methods for Chloride Ion In Water
Effective Date
01-Jul-2004
Refers
ASTM D512-89(1999) - Standard Test Methods for Chloride Ion In Water
Effective Date
10-Jun-1999
Refers
ASTM D1193-99e1 - Standard Specification for Reagent Water
Effective Date
10-Feb-1999
Refers
ASTM D1193-99 - Standard Specification for Reagent Water
Effective Date
10-Feb-1999

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ASTM F862-11(2022) - Standard Practice for pH and Chloride-ion Concentration of Aerospace Hydraulic FluidsASTM F862-11(2022) - Standard Practice for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids
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ASTM F862-11(2022) - Standard Practice for pH and Chloride-ion Concentration of Aerospace Hydraulic Fluids
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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.
Designation: F862 − 11 (Reapproved 2022)
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 3.1.1 The pH is measured using a glass electrode and pH
meter.
1.1 This practice covers the measurement of the pH and
3.1.2 The quantity of the chloride ion is determined using a
chloride ion of water extraction of aerospace hydraulic fluids.
chloride selective ion electrode and a selective ion meter.
1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
4. Significance and Use
standard.
4.1 On application of the hydraulic fluid within the me-
1.3 This standard does not purport to address all of the
chanical fluidic system, the fluid may become contaminated
safety concerns, if any, associated with its use. It is the
with acid and chloride ion. Mechanical shearing of the hydrau-
responsibility of the user of this standard to establish appro-
lic fluid in the presence of the minute quantity of water and
priate safety, health, and environmental practices and deter-
residual amount of organic solvents, used in cleaning, may
mine the applicability of regulatory limitations prior to use.
initiate formation of acid and chloride ion. Measurements are
1.4 This international standard was developed in accor-
desired to control and maintain the cleanliness and non-
dance with internationally recognized principles on standard-
corrosiveness of the fluidic system.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5. Apparatus
mendations issued by the World Trade Organization Technical
5.1 Combination pH Selective Ion Meter,
Barriers to Trade (TBT) Committee.
5.2 Glass Electrode—The pH response shall be 60.05 pH.
2. Referenced Documents
5.3 Reference Electrode—A calomel, silver/silver chloride,
or other reference electrode of constant potential.
2.1 ASTM Standards:
D512 Test Methods for Chloride Ion In Water (Withdrawn
5.4 Chloride Selective Ion Electrode.
2021)
5.5 Double Junction Reference Electrode, sleeve-type
D1193 Specification for Reagent Water
E70 Test Method for pH of Aqueous Solutions With the
5.6 Separatory Funnel, 250 mL.
Glass Electrode
6. Reagents
3. Summary of Method
6.1 Water, reagent grade, Type IV, in accordance with
3.1 The aerospace hydraulic fluid sample is shaken with Specification D1193.
water, and the pH and the quantity of chloride ion are
6.2 Reference Buffer Solutions, SRM/RM 185, 186,
determined from the water layer.
and 187—Materials supplied by the National Institute of Stan-
dards and Technology with pH values.
This practice is under the jurisdiction of ASTM Committee F07 on Aerospace
7. Standardization of pH Meter
and Aircraft and is the direct responsibility of Subcommittee F07.07 on Qualifica-
tion Testing of Aircraft Cleaning Materials.
7.1 Standardize the pH meter in accordance with Test
Current edition approved May 1, 2022. Published June 2022. Originally
Method E70.
approved in 1984. Last previous edition approved in 2017 as F862 – 11(2017). DOI:
10.1520/F0862-11R22.
PART A—pH MEASUREMENT
For referenced ASTM stand
...

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Standard Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters

SIGNIFICANCE AND USE
5.1 Reported particle size measurement is a function of both the actual particle dimension and shape factor, as well as the particular physical or chemical properties of the particle being measured. Caution is required when comparing data from instruments operating on different physical or chemical parameters or with different particle size measurement ranges. Sample acquisition, handling, and preparation can also affect the reported particle size results.
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1.1 These test methods cover the determination of the size distribution and quantity of particulate matter contamination from aerospace fluids isolated on a membrane filter. The microscopical techniques described may also be applied to other properly prepared samples of small particles. Two test methods are described for sizing particles as follows:  
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This practice establishes the apparatuses and materials needed, possible hazards, and two standard procedures for taking samples of cryogenic aerospace fluids for analysis. For the Dewar flask procedure, a clean Dewar flask is used to collect a sample of cryogenic aerospace fluid either from a sampling valve, or poured from a Dewar flask used for storage. Whereas, for the cryogenic sampler procedure, the sampler is used to withdraw a small amount of liquefied gas from a large supply, and is then allowed to cool until a steady stream of cryogenic liquid exists in the sampler. Once the sampling valves are closed, the trapped liquid will convert to gas and pressurize the sampling vessel.
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SIGNIFICANCE AND USE
7.1 Although a cleaning action is imparted to the test component, it is not the intent of this practice to serve as a cleaning procedure. Components are normally cleaner after each consecutive test; thus repeated tests may be used to establish process limits for a given component (Fig. 4). A specific set of test parameters must be supplied by the agency specifying cleanliness limits. Fig. 1, Fig. 2, and Fig. 3 may be used as a guide to establish the desired parameters of test fluid, vibration, extraction, and analysis.
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1.1 This specification (see Note 1) covers grades of fuel oil intended for use in various types of fuel-oil-burning equipment under various climatic and operating conditions. These grades are described as follows:  
1.1.1 Grades No. 1 S5000, No. 1 S500, No. 1 S15, No. 2 S5000, No. 2 S500, and No. 2 S15 are middle distillate fuels for use in domestic and small industrial burners. Grades No. 1 S5000, No. 1 S500, and No. 1 S15 are particularly adapted to vaporizing type burners or where storage conditions require low pour point fuel.  
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1.4.1 Non-SI units are provided in Table 1 and Table 2 and in 7.1.2.1/7.1.2.2 because these are common units used in the industry.
Note 3: The generation and dissipation of static electricity can create problems in the handling of distillate burner fuel oils. For more information on the subject, see Guide D4865.  
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5.2 This test method is used, or referred to, in specifications and classifications of rear-axle gear lubricants such as:  
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5.2.2 American Petroleum Institute (API) Publication 1560.  
5.2.3 SAE J308.  
5.2.4 SAE J2360.
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5.1.4 Panel shear stiffness,  
5.1.5 Panel strength, and  
5.1.6 Panel failure modes.
SCOPE
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