ASTM F482-03
(Test Method)Standard Test Method for Corrosion of Aircraft Metals by Total Immersion in Maintenance Chemicals
Standard Test Method for Corrosion of Aircraft Metals by Total Immersion in Maintenance Chemicals
SIGNIFICANCE AND USE
This test method not only provides information on the accumulated effects of corrosion at specific time periods under a given set of conditions, but also provides information on the initial rate of corrosion of virgin metal, the corrosion rate of metal per unit time after long exposure, and the initial corrosion rate of virgin metal after long exposure of the corroding fluid to metal. The test also provides a means of determining the direction corrosion will take with time, although causes for increase or decrease in the corrosiveness and corrodibility of media and metal (such as passive film formation or destruction, depletion of corrosive contaminate, and so forth) as a function of time are not given.
SCOPE
1.1 This test method covers the determination of the corrosiveness of tank-type aircraft maintenance chemicals on aircraft metals and the corrodibility of metals in these maintenance chemicals with time. The determination is made under conditions of total immersion by a combination of weight change measurements and visual qualitative determinations of change.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are 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. For specific precautions, see Section 5.
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Standards Content (Sample)
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Designation:F 482–03
Standard Test Method for
Corrosion of Aircraft Metals by Total Immersion in
1
Maintenance Chemicals
This standard is issued under the fixed designation F 482; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope corrosion rate of virgin metal after long exposure of the
corroding fluid to metal. The test also provides a means of
1.1 This test method covers the determination of the corro-
determining the direction corrosion will take with time, al-
siveness of tank-type aircraft maintenance chemicals on air-
thoughcausesforincreaseordecreaseinthecorrosivenessand
craft metals and the corrodibility of metals in these mainte-
corrodibility of media and metal (such as passive film forma-
nance chemicals with time. The determination is made under
tion or destruction, depletion of corrosive contaminate, and so
conditions of total immersion by a combination of weight
forth) as a function of time are not given.
change measurements and visual qualitative determinations of
change.
4. Apparatus
1.2 The values stated in SI units are to be regarded as the
4.1 Wide-Mouth Glass Jar or Flask of suitable sizes (3000
standard. The values given in parentheses are for information
to 4000 mL), capable of accommodating a reflux condenser, a
only.
thermometer, and a specimen support system. Fig. 1 shows a
1.3 This standard does not purport to address all of the
typical arrangement, but any array meeting the provisions of
safety concerns, if any, associated with its use. It is the
4.2-4.5 is acceptable.
responsibility of the user of this standard to establish appro-
4.1.1 If agitation is required, use an apparatus capable of
priate safety and health practices and determine the applica-
accepting a stirring mechanism, such as a magnetic stirrer or
bility of regulatory limitations prior to use. For specific
impeller. Choose the glass jar or flask such that the specimens
precautions, see Section 5.
will remain fully immersed in a vertical position during the
2. Referenced Documents test, and the ratio of area of immersed metal to volume of
solution will be in accordance with 8.1.
2.1 ASTM Standards:
4.2 Specimen-Supporting Device—a glass or fluorocarbon
D235 Specification for Mineral Spirits (Petroleum Spirits)
2 plastic supporting system designed to keep the specimen fully
(Hydrocarbon Dry Cleaning Solvent)
2
immersed while assuring free contact with the corroding
D329 Specification for Acetone
2 solution,anddesignedtophysicallyisolatethespecimensfrom
D740 Specification for Methyl Ethyl Ketone
3
each other.
D1193 Specification for Reagent Water
4 4.3 Condenser—a glass reflux condenser of the water-
E1 Specification for ASTM Thermometers
cooled type, having a condenser jacket 200 to 300 mm in
3. Significance and Use length.
4.4 Constant-Temperature Device—Use any suitable regu-
3.1 This test method not only provides information on the
latedheatingdevice(mantle,hotplate,orbath)tomaintainthe
accumulated effects of corrosion at specific time periods under
solution at the required temperature.
a given set of conditions, but also provides information on the
4.5 Thermometer—an ASTM 75-mm (3-in.) immersion
initial rate of corrosion of virgin metal, the corrosion rate of
thermometer having a range from −18 to 150°C (0 to 302°F)
metal per unit time after long exposure, and the initial
and conforming to requirements forThermometer 1F in accor-
dance with Specification E1.
1
This test method is under the jurisdiction of ASTM Committee F07 on
Aerospace andAircraft and is the direct responsibility of Subcommittee F07.07 on
5. Safety Precautions
Qualification Testing of Aircraft Cleaning Materials.
5.1 The solvents used in the cleaning of test specimens are
Current edition approved Apr. 10, 2003. Published May 2003. Originally
e1
published in 1977. Last previous edition approved in 1999 as F482–84 (1999) .
flammable and harmful if inhaled. Keep away from sparks and
2
Annual Book of ASTM Standards, Vol 06.04.
openflames.Avoidbreathingvaporsandprolongedorrepeated
3
Annual Book of ASTM Standards, Vol 11.01.
4 contact with the skin. Use with adequate ventilation.
Annual Book of ASTM Standards, Vol 14.03.
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F482–03
7. Test Specimen
7.1 Preheatthetestspecimensto60 62°C(150 65°F)and
immerse in a beaker containing Mineral Spirits, Type II,
conforming to Specification D235. Swab the surface of the
individualspecimenthoroughlyusingcleanforcepstoholdthe
specimen and the cotton
...
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