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This test involves a salt spray
fog with the addition of Sulfur Dioxide (SO2) gas directly into
the salt spray testing chamber or cabinet. The salt spray solution is defined
either by mutual agreement or by the specifications covering the material or
product to be tested.
The temperature in the exposure
zone of the salt spray cabinet or chamber is kept at a constant 35°C + 1.1
or − 1.7°C (95°F + 2 or − 3°F).
The (SO2) gas
should be introduced into the salt spray cabinet in a manner that insures a
uniform dispersion within the chamber.
The cycle of So2
introduction depends on the specifications of the material or product being
tested, or is determined by mutual agreement. A couple examples of commonly used
cycles for this test are:
Constant spray with introduction of SO2 gas for 1hr
4 times a day (every 6 hrs),
1⁄2-hr salt spray, 1⁄2-hr SO2, and 2-hr soak.
To obtain complete
specifications
go to
ASTM International.
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