ASTM D1838-03

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An American National Standard
Designation: D 1838 – 03
Standard Test Method for
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Copper Strip Corrosion by Liquefied Petroleum (LP) Gases
This standard is issued under the fixed designation D 1838; 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.
1. Scope * 4. Significance and Use
1.1 This test method detects the presence of components in 4.1 Copper corrosion limits provide assurance that difficul-
liquefied petroleum gases which may be corrosive to copper. ties will not be experienced in deterioration of the copper and
copper-alloy fittings and connections that are commonly used
NOTE 1—For an equivalent copper strip test applicable to less volatile
in many types of utilization, storage, and transportation equip-
petroleum products, see Test Method D 130.
ment.
1.2 The values stated in acceptable metric units are to be
regarded as the standard. The values in parentheses are for
5. Apparatus
information only.
5.1 Corrosion Test Cylinder, constructed of stainless steel
1.3 This standard does not purport to address all of the
with an O-ring removable top closure according to the dimen-
safety concerns, if any, associated with its use. It is the
sions given in Fig. 1. Provide a flexible aluminum connecting
responsibility of the user of this standard to establish appro-
1
hose with swivel connections with adapter to a 6.4 mm ( ⁄4-in.)
priate safety and health practices and determine the applica-
pipe. The whole assembly shall be capable of withstanding a
bility of regulatory limitations prior to use. For specific
hydrostatictestpressureof6895kPa(1000psig).Noleakshall
warning statements, see 6.1, 8.3.1, and Annex A1.
be discernible when tested at 3450 kPa (500 psig) with gas.
5.2 Water Bath, capable of being maintained at 37.8 6
2. Referenced Documents
0.5°C (100 6 1°F). Incorporate suitable supports to hold the
2.1 ASTM Standards:
test cylinder in an upright position. Make the bath deep enough
D 130 Test Method for Detection of Copper Corrosion from
sothattheentirecylinderandvalveswillbecoveredduringthe
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Petroleum Products by the Copper Strip Tarnish Test
test.
3
E 1 Specification for ASTM Thermometers
5.3 Temperature Sensing Device (TSD)—Capable of moni-
2.2 ASTM Adjuncts:
toring the desired test temperature in the bath to within an
4
ADJD0130, ASTM Copper Strip Corrosion Standards
accuracyof 60.5°C(1°F)orbetter.TheASTM12C(12F)total
immersion thermometer has been found suitable to use in the
3. Summary of Test Method
test(seeSpecificationE 1).Ifused,nomorethan25mm(1in.)
3.1 A polished copper strip is immersed in approximately
of the mercury should extend above the surface of the bath at
100 mL of the sample and exposed at a temperature of 37.8°C
the test temperature.
(100°F) for1hina cylinder of suitable working pressure. At
5.4 Strip Polishing Vise, to hold the copper strip firmly
the end of this period, the copper strip is removed and rated as
without marring the edges. For convenient vises see Test
one of the four classifications of the ASTM Copper Corrosion
Method D 130.
Standards.
6. Materials
6.1 Wash Solvent—Use acetone or knock test grade
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This test method is under the jurisdiction of ASTM Committee D02 on
2.2.4 trimethylpentane. (Warning—Extremely flammable.
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
See Annex A1.)
D02.H0 on Liquefied Petroleum Gas.
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6.2 Copper Strip, approximately 12.5 mm ( ⁄2 in.) wide, 1.5
Current edition approved May 10, 2003. Published May 2003. Originally
e1
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approved in 1961. Last previous edition D 1838–91(2001) .
to3.0mm( ⁄16to ⁄8 in.)thick,cutapproximately75mm(3in.)
2
Annual Book of ASTM Standards, Vol 05.01.
long from smooth-surfaced, hard-temper, cold-finished copper
3
Annual Book of ASTM Standards, Vol 14.03.
4 of 99.9 + % purity; electrical bus bar stock is generally
Available from ASTM International Headquarters. Order Adjunct No.
1
ADJD0130. suitable. Drill a 3.2 mm ( ⁄8 in.) hole approximately 3.2 mm
*A Summary of Changes section appears at the end of this standard.
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D1838–03
surface and then moisten the paper with wash solvent before
rubbing the strip against the silicon carbide paper or cloth with
a circular motion. Protect the strip from contact with the
fingers, such as by using ashless filter paper.Alternatively, the
surface of the strip can be prepared by use of motor-driven
machines using appropriate grades of dry paper or cloth.
7.2 Final Preparatio
...