ASTM D3482-90(2000)

Standard Test Method for Determining Electrolytic Corrosion of Copper by Adhesives

SCOPE
1.1 This test method covers the determination of whether an adhesive has any corrosive effect on copper. It is ordinarily intended to distinguish materials that might cause corrosion in electrical and electronic equipment. This procedure is a subjective test for which precision and accuracy have not been established. It is not recommended for adhesives on backing.  
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 problems, 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-Mar-2000
• ICS: 83.180 - Adhesives
• Technical Committee: D14 - Adhesives
• Drafting Committee: D14.80 - Metal Bonding Adhesives

Relations

• Replaced By: ASTM D3482-07 - Standard Practice for Determining Electrolytic Corrosion of Copper by Adhesives
• Effective Date: 01-May-2007

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D3482–90(Reapproved 2000)
Standard Test Method for
Determining Electrolytic Corrosion of Copper by Adhesives
This standard is issued under the fixed designation D 3482; 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 4. Summary of Test Method
1.1 This test method covers the determination of whether an 4.1 Two parallel helices of fine copper wire are laid in
adhesive has any corrosive effect on copper. It is ordinarily etched grooves on a glass tube.The adhesive material is coated
intended to distinguish materials that might cause corrosion in over the wires and the tube and then allowed to set or cure.The
electrical and electronic equipment. This procedure is a sub- wired tube is exposed to high humidity with a d-c potential
jective test for which precision and accuracy have not been applied between the wires. Corrosion products are observed
established. It is not recommended for adhesives on backing. visually.
1.2 The values stated in SI units are to be regarded as the
5. Significance and Use
standard. The values given in parentheses are for information
only. 5.1 Adhesives can be exposed to both electrical potential
and humidity in many electrical and electronic applications. It
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the is therefore desirable to provide a means of examining the
corrosive tendencies of certain adhesives towards metals.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5.2 Although electrolytic corrosion is a direct result of ionic
conduction in the adhesive, the nature of the exposed metals
bility of regulatory limitations prior to use.
will have a bearing on both the severity of metal attack and the
2. Referenced Documents
visibility of corrosion products. Because it gives a visual
2.1 ASTM Standards: indication of corrosion and because of its widespread use in
D 907 Terminology of Adhesives electrical circuits, copper is used in this test method. However,
D 996 Terminology of Packaging and Distribution Environ- this would not preclude the use of other metals for specific
ments interests.
E 104 Practice for Maintaining Constant Relative Humidity 5.3 This procedure is a subjective test in that determinations
by Means of Aqueous Solutions of the presence of corrosion is based on a visual inspection for
G 15 Terminology Relating to Corrosion and Corrosion a green discoloration or other evidence of corrosion.
Testing
6. Apparatus and Material
3. Terminology
6.1 Motor (Optional), low-speed, approximately 10 r/min
3.1 Definitions—Definitions of terms in this test method for winding wire helices.
may be found in Terminologies D 907 and D 996. 6.2 Oven (or Temperature-Controlled Chamber),
3.1.1 electrolytic corrosion, n—the corrosion of metal re- circulating-air, or chamber controlled at 39.5 6 1°C (95 6
sulting from current flow under an electrical potential in the 2°F), unless otherwise specified.
presence of moisture. 6.3 Battery, 45-V, or equivalent source of d-c power.
6.4 Corrosion Test Apparatus—See Fig. 1.
6.4.1 Helically Etched Glass Tubing—See Fig. 2.
This test method is under the jurisdiction of ASTM Committee D-14 on 6.4.2 Wire, No. 36 Awg, 0.13 mm (0.005 in.) in diameter,
Adhesives and is the direct responsibility of Subcommittee D14.80 on Metal
OFHC (Oxygen-Free High-Conductivity) bare copper wire.
Bonding Adhesives.
6.4.3 Test Tube, borosilicate glass, 32 mm (1 ⁄2 in.) in
Current edition approved March 30, 1990. Published May 1990. Originally
outside diameter, 200 mm (8 in.) long.
published as D 3482 – 76. Last previous edition D 3482 – 76 (1987).
Annual Book of ASTM Standards, Vol 15.06.
Annual Book of ASTM Standards, Vol 15.09.
Annual Book of ASTM Standards, Vol 11.03. Wire fromAnaconda Wire and Cable Co., 605 3rdAve., NewYork, NY10016,
Annual Book of ASTM Standards, Vol 03.02. has been found satisfactory.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D3482
NOTE 1—MATERIAL: Glass, Pyrex No. 7740 by Corning Glass
Works, Corning, NY, may be obtained from Kontes Glass Co., Vineland,
NJ. Request Part No. 0022037-0101.
FIG. 2 Glass Tube
NOTE 1—Short lengths of 14-gage tinned copper wire have worked
satisfactory as connecting posts.
7.6 Apply two thin uniform applications of the test adhesive
in approximately 6-mm ( ⁄4-in.) wide uniform stripes of the
FIG. 1 Corrosion Test Apparatus material to be tested 180° apart over the entire exposed length
of the test apparatus. Allow the material to set or cure in
accordance with the manufacturer’s recommendations.
6.4.4 Rubber Stopper, No. 6, neoprene.
7.6.1 For adhesive sy
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