ASTM F502-02

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Designation:F502–02
Standard Test Method for
Effects of Cleaning and Chemical Maintenance Materials on
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Painted Aircraft Surfaces
This standard is issued under the fixed designation F 502; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope FED-STD-595 Colors Used in Government Procurement
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2.4 Industry Standards:
1.1 This test method covers determination of the effects of
SAE-AMS-QQ-A-250/13 Aluminum Alloy Alclad 7075,
cleaning solutions and liquid cleaner concentrates on painted
Plate and Sheet
aircraft surfaces (Note 1). Streaking, discoloration, and blister-
ing may be determined visually. Softening is determined with
3. Materials
a series of specially prepared pencils wherein determination of
3.1 Drawing Pencils (Note 2)—6B, 5B, 4B, 3B, 2B, B, HB,
the softest pencil to rupture the paint film is made.
F, H, 2H, 4H, 5H, and 6H.
NOTE 1—Thistestmethodisapplicabletoanypaintfilmthatisexposed
3.2 Fine Sand Paper, 180 to 320 grit.
to cleaning materials. MIL-PRF-85285 has been selected as a basic
3.3 Abrasive Mats, A-A-58054, aluminum oxide, fine or
example. When other paint finishes are used, refer to the applicable
very fine.
material specification for panel preparation and system curing prior to
3.4 Acetone, in accordance with Specification D 329.
testing.
3.5 MIL-PRF-85285 Coating, polyurethane, aliphatic,
1.2 The values stated in inch-pound units are to be regarded
weather-resistant, FED-STD-595 Color No. 17875, insignia
as the standard. The values given in parentheses are for
white.
information.
3.6 MIL-PRF-23377 Primer Coating, epoxy polyamide,
1.3 This standard does not purport to address all of the
chemical- and solvent-resistant.
safety concerns, if any, associated with its use. It is the
3.7 Chemical Conversion Materials, MIL-C-81706, Class
responsibility of the user of this standard to establish appro-
1A, for coating aluminum and aluminum alloys.
priate safety and health practices and determine the applica-
3.8 Distilled or Deionized Water, in accordance with Speci-
bility of regulatory limitations prior to use.
fication D 1193, Type IV.
2. Referenced Documents
NOTE 2—All pencils in a set must be from one manufacturer (for
example, Venus, Eagle, and so forth).
2.1 ASTM Standards:
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D 329 Specification for Acetone
4. Safety Precautions
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D 1193 Specification for Reagent Water
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4.1 Allsafetyregulationsprescribedforsprayapplicationof
2.2 Military Standards:
polyurethanepaintsshallbestrictlyadheredtointheuseofthis
MIL-PRF-85285 Coating: Polyurethane, High Solids
test method.
A-A-58054 Abrasive Mats, Non-Woven Non-Metallic
4.2 The testing procedure shall be conducted in a well-
MIL-PRF-23377 Primer Coatings: Epoxy, High Solids
ventilated area.
MIL-C-81706 Chemical Conversion Materials for Coating
Aluminum and Aluminum Alloys
5. Test Specimens
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2.3 Federal Standards:
5.1 SAE-AMS-QQ-A-250/13 Aluminum Alloy Alclad
7075-T6, Plate and Sheet.
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6. Test Solutions
This test method is under the jurisdiction of ASTM Committee F07 on
Aerospace and Aircraft and is the direct responsibility of Subcommittee F07.07 on
6.1 Concentrated (as received, if a liquid).
Qualification Testing of Aircraft Cleaning Materials.
6.2 In use dilution, if diluent is water, see 3.8.
Current edition approved Aug. 10, 2002. Published September 2002. Originally
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published as F 502 – 77. Last previous edition F 502 – 93(1998) .
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Annual Book of ASTM Standards, Vol 06.04.
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Annual Book of ASTM Standards, Vol 11.01.
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Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Available from Society of Automotive Engineers (SAE), 400 Commonwealth
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, Attn: NPODS. Dr., Warrendale, PA 15096-0001.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F502–02
7. Procedure additional three to ten days at room temperature. No greater
than one pencil hardness difference between coated panels
7.1 Preparation of Pencils—Prepare a set of drawing pen-
prepared from the same batch of paint at the same time shall be
cils for testing the painted panels by stripping the wood away
3 permitted.
from the end approximately ⁄8 in. without damaging the lead
7.3 Procedure:
(as shown in Fig. 1). Then square the tip of the lead by holding
7.3.1 Placethetestpanelsinahorizontalpositioninanoven
the pencil in a vertical position and moving the lead back and
maintained at 100 6 5°F (38 6 2°C). A
...