FED-STD-228A
Maximum number of
specimens tested for 2
Wire diameter (inch)
cycles in 180 ml. acid
solution
0.400
0.441 - - - - - -
2
0.140
0.0851 - - - - -
4
0.0850
0.0501 - - - - -
6
0.0500
0.0381 - - - - -
10
0.0380
0.0301 - - - - -
12
0.0300
0.0030 - - - - -
14
4.2 The specimen shall be free from mechanical damage. The surface of the specimen shall be cleaned
by immersing in carbon tetrachloride or other suitable solvent for at least 3 minutes and wiping dry with
cheesecloth. The portion of the specimen to be immersed in the test solutions shall not come in contact
with the hands or foreign matter during the test. Sodium polysulfide solution shall be transferred to the
container to a depth of 4 ½ inches. A similar amount of the hydrochloric acid solution shall be placed in
another container. Both solutions shall be adjusted to a temperature of 18° ± 2°C (65° ± 4°F).
4.3 Immersion of specimen, lead and lead-alloy-coated. Unless otherwise specified in the detail
specification for lead- and lead-alloy-coated conductors, a 4 ½ inch length of the clean specimen shall be
immersed in accordance with the following cycles at a temperature of 18° ± 2°C (65° ± 4°F).
4.3.1 Thirty seconds in the sodium polysulfide solution, 3.1.3, washed in clean running water, and
shaken to remove excess water.
4.3.2 The same 4 ½-inch length shall be immersed in the hydrochloric acid solution, 3.1.2, for a period of
1 minute, washed in clean running water, and shaken to remove excess water.
4.3.3 The same 4 ½-inch length shall again be immersed for 30 seconds in the sodium polysulfide
solution, washed in clean running water, and shaken to remove excess water.
4.3.4 The same 4 ½-inch length shall again be immersed for 1 minute in the hydrochloric acid solution,
washed in clean running water, and shaken to remove excess water.
4.4 Immersion of specimen, tin-coated. Unless otherwise specified in the detail specification, for tin-
coated conductors a 4 ½-inch length of the clean specimen shall be immersed in accordance with the
following cycles at a temperature of 18° ± 2°C (65° ± 4°F).
4.4.1 One minute in the hydrochloric acid solution, 3.1.2, washed in clean running water, and shaken to
remove excess water.
4.4.2 The same 4 ½-inch length shall be immersed for 30 seconds in the sodium polysulfide solution,
3.1.3, washed in clean running water, and shaken to remove excess water.
4.4.3 The same 4 ½-inch length shall again be immersed for 1 minute in the hydrochloric acid solution,
washed in clean running water, and shaken to remove excess water.
4.4.4 The same 4 ½-inch length shall again be immersed for 30 seconds in the sodium polysulfide
solution, washed in clean running water, and shaken to remove excess water.
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