ASTM F482-09(2014)

Standard Practice for Corrosion of Aircraft Metals by Total Immersion in Maintenance Chemicals

SIGNIFICANCE AND USE
3.1 This practice 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 practice 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 6.

General Information

• Status: Historical
• Publication Date: 30-Nov-2014
• ICS: 49.025.05 - Ferrous alloys in general
• ICS: 49.025.15 - Non-ferrous alloys in general
• Technical Committee: F07 - Aerospace and Aircraft
• Drafting Committee: F07.07 - Qualification Testing of Aircraft Cleaning Materials

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F482 − 09 (Reapproved 2014)
Standard Practice for
Corrosion of Aircraft Metals by Total Immersion in
Maintenance Chemicals
ThisstandardisissuedunderthefixeddesignationF482;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope a given set of conditions, but also provides information on the
initial rate of corrosion of virgin metal, the corrosion rate of
1.1 This practice covers the determination of the corrosive-
metal per unit time after long exposure, and the initial
ness of tank-type aircraft maintenance chemicals on aircraft
corrosion rate of virgin metal after long exposure of the
metals and the corrodibility of metals in these maintenance
corroding fluid to metal. The test also provides a means of
chemicals with time. The determination is made under condi-
determining the direction corrosion will take with time, al-
tions of total immersion by a combination of weight change
thoughcausesforincreaseordecreaseinthecorrosivenessand
measurementsandvisualqualitativedeterminationsofchange.
corrodibility of media and metal (such as passive film forma-
1.2 The values stated in SI units are to be regarded as the
tion or destruction, depletion of corrosive contaminate, and so
standard. The values given in parentheses are for information
forth) as a function of time are not given.
only.
4. Apparatus
1.3 This standard does not purport to address all of the
4.1 Wide-Mouth Glass Jar or Flask of suitable sizes (3000
safety concerns, if any, associated with its use. It is the
to 4000 mL), capable of accommodating a reflux condenser, a
responsibility of the user of this standard to establish appro-
thermometer, and a specimen support system. Fig. 1 shows a
priate safety and health practices and determine the applica-
typical arrangement, but any array meeting the provisions of
bility of regulatory limitations prior to use. For specific
4.2 – 4.5 is acceptable.
precautions, see Section 6.
4.1.1 If agitation is required, use an apparatus capable of
accepting a stirring mechanism, such as a magnetic stirrer or
2. Referenced Documents
2 impeller. Choose the glass jar or flask such that the specimens
2.1 ASTM Standards:
will remain fully immersed in a vertical position during the
D235Specification for Mineral Spirits (Petroleum Spirits)
test, and the ratio of area of immersed metal to volume of
(Hydrocarbon Dry Cleaning Solvent)
solution will be in accordance with 9.1.
D329Specification for Acetone
4.2 Specimen-Supporting Device—a glass or fluorocarbon
D1193Specification for Reagent Water
E1Specification for ASTM Liquid-in-Glass Thermometers plastic supporting system designed to keep the specimen fully
immersed while assuring free contact with the corroding
3. Significance and Use
solution,anddesignedtophysicallyisolatethespecimensfrom
each other.
3.1 This practice not only provides information on the
accumulated effects of corrosion at specific time periods under
4.3 Condenser—a glass reflux condenser of the water-
cooled type, having a condenser jacket 200 to 300 mm in
length.
This practice is under the jurisdiction ofASTM Committee F07 on Aerospace
and Aircraft and is the direct responsibility of Subcommittee F07.07 on Qualifica- 4.4 Constant-Temperature Device—Use any suitable regu-
tion Testing of Aircraft Cleaning Materials.
latedheatingdevice(mantle,hotplate,orbath)tomaintainthe
Current edition approved Dec. 1, 2014. Published December 2014. Originally
solution at the required temperature.
published in 1977. Last previous edition approved in 2009 as F482–09. DOI:
10.1520/F0482-09R14.
4.5 Thermometer—an ASTM 75-mm (3-in.) immersion
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
thermometer having a range from −18 to 150°C (0 to 302°F)
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
and conforming to requirements forThermometer 1F in accor-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. dance with Specification E1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F482 − 09 (2014)
openflames.Avoidbreathingvaporsandprolongedorrepeated
contact with the skin. Use with adequate ventilation.
6.2 Flammable solvents, acids, or alkalis, or other toxic
compounds are occasionally found in the material used for
aircraft maintenance. Take suitable precautions to prevent
personnel injury.
7. Test Specimens
7.1 The test specimens of a given alloy shall be taken from
thesamesheetstockandshallmeasure50.8by25.4by1.6mm
(2 by 1 by 0.06 in.) with a 3.2-mm (0.125-in.) diameter
mountingholesuitablylocatedatoneendofthespecimen.Test
at least two and preferably three replicates in each concentra-
tion of maintenance chemical solution in accordance with 9.2.
The total area of the specimen shall be taken as 28.2 cm (4.4
in. ).
8. Test Specimen
8.1 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 swab.
8.2 Shake off the excess solvent. Transfer and immerse the
test specimens separately several times in a beaker of methyl
n-propyl ketone.
8.3 Shake off excess methyl n-propyl ketone and dry in a
vacuumdesiccatororinalowtemperatureovenat37.7 63°C
(100 65°F) for 15 min.
9. Conditioning
A = Condenser
9.1 Volume of Solution—The volume of solution shall be
B = Stirring mechanism
500 mL per specimen. Use fresh solution for each set of
C = Containing vessel
D = Specimen holder
replicates.
E = Thermometer
9.2 Solution Concentration:
F = Metal specimen
G = Maintenance chemical solution
9.2.1 Unless otherwise specified, test the specimens in
NOTE 1—THIS IS ONE FORM THAT THE EQUIPMENT CAN TAKE, AND IS NOT
solutions of the maintenance chemical in the concentrated
MANDATORY.ANY ARRAY MEETING THE REQUIREMENTS OF 4.2 – 4.5 is acceptable.
as-received condition and at the recommended dilution using
distilled or deionized water conforming to Specification
FIG. 1 Test Apparatus
D1193, Type IV. (For solid materials, concentrated condition
shallmeaninasaturatedsolutionofthesolidmaterial.)Incase
5. Reagents and Materials
the material is not soluble to the extent noted, record this fact
5.1 Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry
and continue with the test.
Cleaning Solvent, conforming to Specification D235.
9.2.2 Test diphase materials with an appropriate amount of
5.2 Methyl n-propyl ketone (MPK). each phase loaded into the test vessel to simulate use condi-
tions. Totally immerse the corrosion specimens in the working
5.3 Acetone, conforming to Specification D329.
phase of the maintenance chemical.
5.4 Reagent Water, conforming to Specification D1193.
9.2.3 If water is not used as the diluent, record the type and
specification of diluent used in the test.
6. Safety Precautions
9.3 Temperature—Unless otherwise specified, the tempera-
6.1 The solvents used in the cleaning of test specimens are
ture shall be 37.7 63°C (100 62°F).
flammable and harmful if inhaled. Keep away from sparks and
9.4 Test Duration—Total test duration shall be 168 h, with
3 specimens being added or removed at intermediate intervals.
The sole source of supply of Methyl n-Propyl Ketone (MPK) known to the
committee at this time is Eastman Chemical Company, Kingsport,TN, USA. If you
9.5 Ifthemaintenancechemicalistobeusedwithagitation,
are aware of alternative suppliers, please provide this information to ASTM
also test the specimens with appropriate agitation to simulate
International Headquarters. Your comments will receive careful consideration at a
meeting of the responsible technical committee, which you may attend. use conditions.
F482 − 09 (2014)
10. Procedure 10.6.2.4 Pitting, and
10.6.2.5 Presence of selective or localized attack.
10.1 Weighfouroffivespecimens(S , S , S ,and S)ofthe
1 2 3 4
10.6.3 If any corrosion deposits remain, remove these prod-
samealloytothenearest0.1mg.Recordtheweights S W , S
1 1 2
ucts from S in accordance with Annex A1 and Annex A2.
W , S W , S W . Retain the fifth specimen of each alloy for
1 3 1 4 1
Rinse with distilled water conforming to Specification D1193,
comparison purposes.
Type IV followed by acetone conforming to Specification
10.2 Immerse three of the specimens (S , S , and S)inthe
1 2 3
D329 and dry.
test solution using only specimens of the same alloy in the
10.6.4 Weigh to the nearest 0.1 mg and calculate the weight
containing vessel. Retain S for use in accordance with 10.5.
lossasW .Ifthespecimenhasbeentreatedinaccordancewith
Annex A1 and Annex A2, subtract any weight losses of the
10.3 At the end of 48-h exposure time, remove S and
controlspecimenofAnnexA1andAnnexA2,fromtheweight
proceed as follows:
loss of the test specimen.
10.3.1 Rinse thoroughly under hot tap water, 49 to 60°C
(120 to 140°F), while scrubbin
...

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: F482 − 09 F482 − 09 (Reapproved 2014)
Standard Practice for
Corrosion of Aircraft Metals by Total Immersion in
Maintenance Chemicals
This standard is issued under the fixed designation F482; 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 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 6.
2. Referenced Documents
2.1 ASTM Standards:
D235 Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)
D329 Specification for Acetone
D1193 Specification for Reagent Water
E1 Specification for ASTM Liquid-in-Glass Thermometers
3. Significance and Use
3.1 This practice 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.
4. Apparatus
4.1 Wide-Mouth Glass Jar or Flask of suitable sizes (3000 to 4000 mL), capable of accommodating a reflux condenser, a
thermometer, and a specimen support system. Fig. 1 shows a typical arrangement, but any array meeting the provisions of 4.2 –
4.5 is acceptable.
4.1.1 If agitation is required, use an apparatus capable of accepting a stirring mechanism, such as a magnetic stirrer or impeller.
Choose the glass jar or flask such that the specimens will remain fully immersed in a vertical position during the test, and the ratio
of area of immersed metal to volume of solution will be in accordance with 9.1.
4.2 Specimen-Supporting Device—a glass or fluorocarbon plastic supporting system designed to keep the specimen fully
immersed while assuring free contact with the corroding solution, and designed to physically isolate the specimens from each other.
4.3 Condenser—a glass reflux condenser of the water-cooled type, having a condenser jacket 200 to 300 mm in length.
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 May 15, 2009Dec. 1, 2014. Published June 2009December 2014. Originally published in 1977. Last previous edition approved in 20032009 as
F482 – 03.F482 – 09. DOI: 10.1520/F0482-09.10.1520/F0482-09R14.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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 C700, West Conshohocken, PA 19428-2959. United States
F482 − 09 (2014)
A = Condenser
B = Stirring mechanism
C = Containing vessel
D = Specimen holder
E = Thermometer
F = Metal specimen
G = Maintenance chemical solution
NOTE 1—THIS IS ONE FORM THAT THE EQUIPMENT CAN TAKE, AND IS NOT MANDATORY. ANY ARRAY MEETING THE REQUIREMENTS OF 4.2 – 4.5 is acceptable.
FIG. 1 Test Apparatus
4.4 Constant-Temperature Device—Use any suitable regulated heating device (mantle, hot plate, or bath) to maintain the
solution at the required temperature.
4.5 Thermometer—an ASTM 75-mm (3-in.) immersion thermometer having a range from −18 to 150°C (0 to 302°F) and
conforming to requirements for Thermometer 1F in accordance with Specification E1.
5. Reagents and Materials
5.1 Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent, conforming to Specification D235.
5.2 Methyl n-propyl ketone (MPK).
5.3 Acetone, conforming to Specification D329.
5.4 Reagent Water, conforming to Specification D1193.
The sole source of supply of Methyl n-Propyl Ketone (MPK) known to the committee at this time is Eastman Chemical Company, Kingsport, TN, USA. If you are aware
of alternative suppliers, please provide this information to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible
technical committee, which you may attend.
F482 − 09 (2014)
6. Safety Precautions
6.1 The solvents used in the cleaning of test specimens are flammable and harmful if inhaled. Keep away from sparks and open
flames. Avoid breathing vapors and prolonged or repeated contact with the skin. Use with adequate ventilation.
6.2 Flammable solvents, acids, or alkalis, or other toxic compounds are occasionally found in the material used for aircraft
maintenance. Take suitable precautions to prevent personnel injury.
7. Test Specimens
7.1 The test specimens of a given alloy shall be taken from the same sheet stock and shall measure 50.8 by 25.4 by 1.6 mm
(2 by 1 by 0.06 in.) with a 3.2-mm (0.125-in.) diameter mounting hole suitably located at one end of the specimen. Test at least
two and preferably three replicates in each concentration of maintenance chemical solution in accordance with 9.2. The total area
2 2
of the specimen shall be taken as 28.2 cm (4.4 in. ).
8. Test Specimen
8.1 Preheat the test specimens to 60 6 2°C (150 6 5°F) and immerse in a beaker containing Mineral Spirits, Type II,
conforming to Specification D235. Swab the surface of the individual specimen thoroughly using clean forceps to hold the
specimen and the cotton swab.
8.2 Shake off the excess solvent. Transfer and immerse the test specimens separately several times in a beaker of methyl
n-propyl ketone.
8.3 Shake off excess methyl n-propyl ketone and dry in a vacuum desiccator or in a low temperature oven at 37.7 6 3°C
(100 6 5°F) for 15 min.
9. Conditioning
9.1 Volume of Solution—The volume of solution shall be 500 mL per specimen. Use fresh solution for each set of replicates.
9.2 Solution Concentration:
9.2.1 Unless otherwise specified, test the specimens in solutions of the maintenance chemical in the concentrated as-received
condition and at the recommended dilution using distilled or deionized water conforming to Specification D1193, Type IV. (For
solid materials, concentrated condition shall mean in a saturated solution of the solid material.) In case the material is not soluble
to the extent noted, record this fact and continue with the test.
9.2.2 Test diphase materials with an appropriate amount of each phase loaded into the test vessel to simulate use conditions.
Totally immerse the corrosion specimens in the working phase of the maintenance chemical.
9.2.3 If water is not used as the diluent, record the type and specification of diluent used in the test.
9.3 Temperature—Unless otherwise specified, the temperature shall be 37.7 6 3°C (100 6 2°F).
9.4 Test Duration—Total test duration shall be 168 h, with specimens being added or removed at intermediate intervals.
9.5 If the maintenance chemical is to be used with agitation, also test the specimens with appropriate agitation to simulate use
conditions.
10. Procedure
10.1 Weigh four of five specimens (S , S , S , and S ) of the same alloy to the nearest 0.1 mg. Record the weights S W , S
1 2 3 4 1 1 2
W , S W , S W . Retain the fifth specimen of each alloy for comparison purposes.
1 3 1 4 1
10.2 Immerse three of the specimens (S , S , and S ) in the test solution using only specimens of the same alloy in the containing
1 2 3
vessel. Retain S for use in accordance with 10.5.
10.3 At the end of 48-h exposure time, remove S and proceed as follows:
10.3.1 Rinse thoroughly under hot tap water, 49 to 60°C (120 to 140°F), while scrubbing with a stiff bristle brush. Follow with
distilled or deionized water conforming to Specification D1193, Type IV at room temperature.
10.3.2 Rinse with a stream of acetone conforming to Specification D329 from a wash bottle and dry.
10.3.3 If corrosion deposits are still adhered, remove corrosion products in accordance with Annex A1 and Annex A2 and rinse
dry in accordance with 10.3.1 and 10.3.2.
10.3.4 Weigh to the neare
...