Humidity Test(General Motors)
Can be used to test coated specimens by exposing them to water fog at an elevated temperature, using apparatus similar to that used for salt spray testing to ASTM B117.
Test specimens are placed in an enclosed chamber that meets the apparatus requirements of ASTM B117. Here they are exposed to a continuous indirect spray water, which falls-out on to the specimens at a rate of 1.0 to 2.0ml/80cm²/hour, in a chamber temperature of +38C and a humidity of 100%RH. This climate is maintained under constant steady state conditions. The test duration is variable.
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