Standard Practice for Resistance of Adhesive Bonds to Chemical Reagents

SIGNIFICANCE AND USE
This practice is designed to determine the general effects of chemical reagents on the strength of the bonded system. It cannot distinguish between adsorption in the bulk adhesive or penetration at the adhesive/substrate interface.
SCOPE
1.1 This practice provides a uniform procedure for the exposure of adhesively bonded substrates to selected environments. This practice also provides for a qualitative measure of the adhesive bond strength using existing standard methods after exposure.
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 warnings, see Section 8.

General Information

Status
Historical
Publication Date
30-Sep-2010
Technical Committee
Current Stage
Ref Project

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ASTM D896-04(2010)e1 - Standard Practice for Resistance of Adhesive Bonds to Chemical Reagents
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
´1
Designation: D896 − 04 (Reapproved 2010)
Standard Practice for
Resistance of Adhesive Bonds to Chemical Reagents
This standard is issued under the fixed designation D896; 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.
This standard has been approved for use by agencies of the Department of Defense.
This practice replaces Method 2011.1 of Federal Test Method Standard No. 175a
´ NOTE—Editorial corrections were made throughout in October 2010.
1. Scope Bonded Plastic Lap-Shear Sandwich Joints in Shear by
Tension Loading
1.1 This practice provides a uniform procedure for the
exposure of adhesively bonded substrates to selected environ-
3. Terminology
ments. This practice also provides for a qualitative measure of
3.1 Definitions—Many terms in this practice are defined in
the adhesive bond strength using existing standard methods
after exposure. Terminology D907.
1.2 The values stated in SI units are to be regarded as the
4. Summary of Practice
standard. The values given in parentheses are for information
4.1 Specimens are immersed in selected reagents for a
only.
specified time and temperature. The specimens are recovered,
1.3 This standard does not purport to address all of the
dried, and tested in accordance with selected methods, such as
safety concerns, if any, associated with its use. It is the
Test Methods D1002 or D3164.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use. For specific
5.1 Thispracticeisdesignedtodeterminethegeneraleffects
warnings, see Section 8.
of chemical reagents on the strength of the bonded system. It
cannot distinguish between adsorption in the bulk adhesive or
2. Referenced Documents
2 penetration at the adhesive/substrate interface.
2.1 ASTM Standards:
B117 Practice for Operating Salt Spray (Fog) Apparatus
6. Apparatus
D471 Test Method for Rubber Property—Effect of Liquids
6.1 The apparatus consists of containers for test specimens
D543 Practices for Evaluating the Resistance of Plastics to
and a cabinet for maintaining a temperature of 23 6 3°C (73 6
Chemical Reagents
5°F). Other suitable apparatus is required for immersing
D907 Terminology of Adhesives
specimens above and below room temperature.
D1002 Test Method for Apparent Shear Strength of Single-
Lap-Joint Adhesively Bonded Metal Specimens by Ten-
NOTE 1—Exercise care in the choice of materials with respect to
sion Loading (Metal-to-Metal)
adherend and containers. Confirm that they are unaffected by the chemi-
D1151 Practice for Effect of Moisture and Temperature on cals and solvents used in this practice.
Adhesive Bonds
6.2 Apparatus for making strength tests is specified in the
D3164 Test Method for Strength Properties of Adhesively
method for the property to be measured.
7. Reagents
This practice is under the jurisdiction of ASTM Committee D14 on Adhesives
7.1 Directions for preparations of reagents are for approxi-
and is the direct responsibility of Subcommittee D14.80 on Metal Bonding
mately 1-L quantities. All percentages are by weight.
Adhesives.
Current edition approved Oct. 1, 2010. Published October 2010. Originally
7.2 Standard chemical reagents are selected from the list
approved in 1946. Last previous edition approved in 2004 as D896 – 04. DOI:
given in Practices D543. Standard oils and fuels are selected
10.1520/D0896-04R10E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or from the list given in Test Method D471.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.3 Distilled Water—Freshlyprepareddistilledwaterisused
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. wherever water is specified in this practice.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
D896 − 04 (2010)
8. Supplementary Reagents (see 7.1) 10.2 A short time test is permissible for the purpose of
eliminating those materials that are unsuitable or unduly
8.1 Hydrocarbon Mixture No. 1:
affected by the reagents, performed on films or suitable
Isooctane (2,4-trimethylpentane) 600 mL
specimens of the adhesive prepared in accordance with the
Toluene 200 mL
Xylene 150 mL
manufacturer’s instructions with regard to drying time, cure,
etc.
8.2 Standard Jet Fuel No. 1:
Toluene 300 mL
10.3 Remove the individual specimen from the reagent.
Cyclohexane 600 mL
Rinse aqueous reagents off the specimen with distilled water.
Isooctane (2,4-trimethylpentane) 100 mL
n-Butyl disulfide 10 mL
Rinse off other reagents with a suitable organic solvent. Blot
n-Butyl mercaptan (equivalent to 0.005 0.125 g
the specimen dry with a clean dry cloth or blotting paper.
weight % of mercaptan sulfur)
Determine the strength of the specimen immediately at a
8.3 Standard Jet Fuel No. 2:
temperature of 23 6 3°C (73 6 5°F) in accordance with the
Toluene 300 mL
specified method (see Note 5).
Cyclohexane 600 mL
Isooctane (2,4-trimethylpentane) 100 mL
10.4 Using air as the contact medium, condition the control
n-Butyl disulfide 1 mL
spe
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