ASTM D3482-07
(Practice)Standard Practice for Determining Electrolytic Corrosion of Copper by Adhesives
Standard Practice for Determining Electrolytic Corrosion of Copper by Adhesives
SCOPE
1.1 This practice 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 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
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Standards Content (Sample)
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Designation: D 3482 – 07
Standard Practice for
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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 (ϵ) 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 Practice
1.1 This practice 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
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2.1 ASTM Standards: indication of corrosion and because of its widespread use in
D907 Terminology of Adhesives electrical circuits, copper is used in this practice. However, this
D996 Terminology of Packaging and Distribution Environ- would not preclude the use of other metals for specific
ments interests.
E104 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
G15 Terminology Relating to Corrosion and Corrosion a green discoloration or other evidence of corrosion.
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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 907D907, D 996D996, and 6.2 Oven (or Temperature-Controlled Chamber),
G15G15. circulating-air, or chamber controlled at 39.5 6 1°C (95 6
3.1.1 electrolytic corrosion, n—the corrosion of metal re- 2°F), unless otherwise specified.
sulting from current flow under an electrical potential in the 6.3 Battery, 45-V, or equivalent source of d-c power.
presence of moisture. 6.4 Corrosion Test Apparatus—See Fig. 1.
6.4.1 Helically Etched Glass Tubing—See Fig. 2.
6.4.2 Wire, No. 36 Awg, 0.13 mm (0.005 in.) in diameter,
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This practice is under the jurisdiction of ASTM Committee D14 on Adhesives
OFHC (Oxygen-Free High-Conductivity) bare copper wire.
and is the direct responsibility of Subcommittee D14.80 on Metal Bonding
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6.4.3 Test Tube, borosilicate glass, 32 mm (1 ⁄2 in.) in
Adhesives.
Current edition approved May 1, 2007. Published May 2007. Originally
outside diameter, 200 mm (8 in.) long.
approved in 1976. Last previous edition approved in 2000 as D 3482 – 90 (2000).
6.4.4 Rubber Stopper, No. 6, neoprene.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.5 Miscellaneous— Soldering iron, rosin-core solder, thin
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on polyethylene film, insulated wire, etc.
the ASTM website.
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Withdrawn. The last approved version of this historical standard is referenced
on www.astm.org.
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