ASTM E864-03
(Practice)Standard Practice for Surface Preparation of Aluminum Alloys to be Adhesively Bonded in Honeycomb Shelter Panels
Standard Practice for Surface Preparation of Aluminum Alloys to be Adhesively Bonded in Honeycomb Shelter Panels
SIGNIFICANCE AND USE
Durable adhesive bonds to aluminum alloys can be obtained reliably only through proper selection and careful control of the materials used and the steps in the bonding process. The preparation of the aluminum alloys to obtain clean, uniform surfaces with appropriate characteristics is a critical step. This practice describes how such surfaces can be obtained.
SCOPE
1.1 This practice covers the preparation of clean uniform surfaces of aluminum alloys suitable for formation of durable adhesive bonds to nonmetallic honeycomb materials in the manufacture of sandwich panels for tactical shelters.
1.2 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 precautionary statements, see Note 1 of 5.2.
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Designation:E864–03
Standard Practice for
Surface Preparation of Aluminum Alloys to Be Adhesively
1
Bonded in Honeycomb Shelter Panels
This standard is issued under the fixed designation E 864; 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 process. The preparation of the aluminum alloys to obtain
clean, uniform surfaces with appropriate characteristics is a
1.1 This practice covers the preparation of clean uniform
critical step. This practice describes how such surfaces can be
surfaces of aluminum alloys suitable for formation of durable
obtained.
adhesive bonds to nonmetallic honeycomb materials in the
manufacture of sandwich panels for tactical shelters.
4. Apparatus
1.2 This standard does not purport to address all of the
4.1 General Processing:
safety concerns, if any, associated with its use. It is the
4.1.1 All heated tanks shall be equipped with automatic
responsibility of the user of this standard to establish appro-
temperature controls and shall have means for agitation to
priate safety and health practices and determine the applica-
prevent local overheating of the solution. Solutions may be
bility of regulatory limitations prior to use. For specific
heated by any internal or external means that do not change
precautionary statements, see Note 1 of 5.2.
their compositions. Steam shall not be introduced into any
2. Referenced Documents solution. Compressed air introduced into any solution or
equipment shall have been filtered to remove oil and moisture.
2.1 ASTM Standards:
4.1.2 Tanks shall be made from, or lined with, materials that
D 2674 Test Method for Analysis of Sulfochromate Etch
have no adverse effects on the solutions used or the parts being
Solution Used in Surface Preparation of Aluminum
treated. All tanks shall be of sufficient size to allow complete
D 3167 Test Method for Floating Roller Peel Resistance of
immersion of the largest part or assembly to be treated.
Adhesives
4.2 Rinse Tanks—Immersion rinse tanks shall be equipped
E 865 Specification for Structural Film Adhesives for Hon-
with a means for skimming or overflowing or both to remove
eycomb Sandwich Panels
surface contamination. The tanks shall be equipped with a
E 866 Specification for Corrosion-Inhibiting Adhesive
means for flushing hollow sections.
Primer for Aluminum Alloys to Be Adhesively Bonded in
4.3 Rinses—Rinses, other than final rinses, shall be main-
Honeycomb Shelter Panels
tained in such a manner to prevent carryover of materials that
2.2 APHA Standard:
would adversely affect the next solution.
Sections 402, 403, and 408 of Standard Methods for the
Examination of Water and Waste Water (15th Edition,
5. Materials
2
1980)
5.1 Water—Water used for makeup of processing solutions
3. Significance and Use and final rinsing shall be deionized water or shall meet the
requirementofTable1.Analysesshallbeperformedasoftenas
3.1 Durable adhesive bonds to aluminum alloys can be
necessary to assure that the water meets the requirements.
obtained reliably only through proper selection and careful
Samples for analysis shall be collected at the processing tanks.
control of the materials used and the steps in the bonding
5.2 Etch Solution:
5.2.1 Method I, Sulfo-Chromate Etch (FPL)—The chemical
1
This practice is under the jurisdiction of ASTM Committee E06 on Perfor-
analysis of the etch solution shall be maintained at approxi-
mance of Buildings and is the direct responsibility of Subcommittee E06.53 on
mately 30 parts by mass of water, ten parts by mass of sulfuric
Materials and Processes for Durable Rigidwall Relocatable Structures.
acid (sp gr 1.84), and one to four parts by mass of sodium
Current edition approved Oct. 1, 2003. Published October 2003. Originally
e1
approved in 1982. Last previous edition approved in 1998 as E 864 – 98 .
dichromate. Prior to use, a minimum of 0.06 part by mass of
2
Available from the American Public Health Assn., 1015 15th St. N.W.,
dissolved 2024 aluminum shall be added.
Washington, DC 20005.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959, United States.
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E864–03
TABLE 1 Requirements for Water to Be Used in Solutions and
phenolphthalein indicator.Titrate with 0.4 N sodium hydroxide
Rinses
toclearorfaintpink.Calculatethenormalityofsulfuricacidin
Requirements
accordance with Table 2.
Min Max
6.3.2.2 Ferric Ion—Pipet a 2-mL (0.06-oz) sample into a
250-mL (8.5-oz) Erlenmeyer flask containing 100 mL
...
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