ASTM D3762-03

Standard Test Method for Adhesive-Bonded Surface Durability of Aluminum (Wedge Test)

SIGNIFICANCE AND USE
The test is primarily qualitative, but is very discriminating in determining variations in adherend surface preparation parameters and adhesive environmental durability. The test has found application in controlling surface preparation operations and in screening surface preparations, primer and adhesive systems for durability. In addition to determining crack growth rate and assigning a value to it, the adhesive–joint failure is evaluated and reported. For example, adhesion failure; cohesion failure; or adherend failure are noted after opening up the specimen at the conclusion of the test period.
SCOPE
1.1 This test method, simulates in a qualitative manner the forces and effects on an adhesive bond joint at metal-adhesive/primer interface. It has proven to be highly reliable in determining and predicting the environmental durability of adherend surface preparations. The method has proven to be correlatable with service performance in a manner that is much more reliable than conventional lap shear or peel tests (Note 2).
Note 1W—hile this test method is intended for use in aluminum-to-aluminum applications it may be used for determining surface durability of other metals and plastics provided consideration is given to thickness and rigidity of the adherends.
Note 2—This test method is not a quantitative fracture strength test method. To measure fracture strength see Test Method D 3433.
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.

General Information

• Status: Historical
• Publication Date: 09-Aug-2003
• ICS: 83.180 - Adhesives
• Technical Committee: D14 - Adhesives
• Drafting Committee: D14.80 - Metal Bonding Adhesives

Relations

• Replaces: ASTM D3762-98 - Standard Test Method for Adhesive-Bonded Surface Durability of Aluminum (Wedge Test)
• Effective Date: 10-Aug-2003
• Replaced By: ASTM D3762-03(2010) - Standard Test Method for Adhesive-Bonded Surface Durability of Aluminum (Wedge Test) (Withdrawn 2019)
• Effective Date: 01-Oct-2010
• Referred By: ASTM D6465-99(2016) - Standard Guide for Selecting Aerospace and General Purpose Adhesives and Sealants
• Effective Date: 10-Aug-2003
• Referred By: ASTM D7826-23a - Standard Guide for Evaluation of New Aviation Gasolines and New Aviation Gasoline Additives
• Effective Date: 10-Aug-2003
• Referred By: ASTM D6361/D6361M-98(2020) - Standard Guide for Selecting Cleaning Agents and Processes
• Effective Date: 10-Aug-2003

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: D3762 – 03
Standard Test Method for
Adhesive-Bonded Surface Durability of Aluminum (Wedge
1
Test)
This standard is issued under the fixed designation D3762; 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 D3433 Test Method for Fracture Strength in Cleavage of
,
2 3 Adhesives in Bonded Metal Joints
1.1 This test method simulates in a qualitative manner the
forces and effects on an adhesive bond joint at metal-adhesive/
3. Terminology
primer interface. It has proven to be highly reliable in deter-
3.1 Definitions—Many of the terms used in this test method
mining and predicting the environmental durability of adher-
are defined in Terminology D907.
end surface preparations. The method has proven to be
correlatable with service performance in a manner that is much
4. Summary of Test Method
morereliablethanconventionallapshearorpeeltests(Note2).
4.1 A wedge is forced into the bondline of a flat-bonded
NOTE 1—While this test method is intended for use in aluminum-to-
aluminum specimen, thereby creating a tensile stress in the
aluminum applications it may be used for determining surface durability
region of the resulting crack tip. The stressed specimen is
of other metals and plastics provided consideration is given to thickness
exposed to an aqueous environment, usually at an elevated
and rigidity of the adherends.
temperature, or to an appropriate environment relative to the
NOTE 2—This test method is not a quantitative fracture strength test
use of the bonded structure. The resulting crack growth with
method. To measure fracture strength see Test Method D3433.
time and failure modes are then evaluated. Variations in
1.2 The values stated in SI units are to be regarded as the adherend surface quality are easily observable when the
standard. The values given in parentheses are for information
specimens are forcibly, if necessary, opened at the test conclu-
only. sion.
1.3 This standard does not purport to address all of the
5. Significance and Use
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 5.1 The test is primarily qualitative, but is very discriminat-
priate safety and health practices and determine the applica- ing in determining variations in adherend surface preparation
bility of regulatory limitations prior to use. parameters and adhesive environmental durability.The test has
found application in controlling surface preparation operations
2. Referenced Documents
and in screening surface preparations, primer and adhesive
4
2.1 ASTM Standards: systems for durability. In addition to determining crack growth
D907 Terminology of Adhesives
rate and assigning a value to it, the adhesive–joint failure is
evaluated and reported. For example, adhesion failure; cohe-
1
sion failure; or adherend failure are noted after opening up the
This test method is under the jurisdiction of ASTM Committee D14 on
Adhesives and is the direct responsibility of Subcommittee D14.80 on Metal
specimen at the conclusion of the test period.
Bonding Adhesives.
Current edition approved August 10, 2003. Published September 2003. Origi-
6. Apparatus
nally approved in 1979. Last previous edition approved in 1998 as D3762 – 98.
6.1 Magnifier (preferably stereo binocular), 5 to 30-power.
DOI: 10.1520/D3762-03.
2
Marceau, J. A., Moji, Y., and McMillan, J. C., “A Wedge Test for Evaluating
6.2 Marking Stylus, sharp-pointed, or triangular file.
Adhesive Bonded Surface Durability,” 21st SAMPE Symposium, Vol 21,April 6–8,
6.3 Wedges, aluminum or stainless steel.
1976.
3
Scardino,W. M., Marceau J.A., “Comparative Stressed Durability ofAdhesive
NOTE 3—Wedges are preferably of the same composition as the
Bonded Aluminum Alloy Joints” Symposium on Durability of Adhesive Bonded
adherends of the specimen being tested to reduce the possibility of
Structures, U. S.ArmyArmament Research and Development Command, Dover, N.
electrolytic corrosion. Stainless steel wedges have been found to work
J. Oct, 27–29, 1976.
4 well with many adherends and are very durable and reuseable.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.4 Scale, small, graduated in millimetres or hundredths of
Standards volume information, refer to the standard’s Document Summary page on
an inch.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D376
...