Dilute electrolyte cyclic fog /dry test
Can be used to test the relative resistance to corrosion paints on steel, when exposed to an changing climate of dilute salt spray at ambient temperature, followed by air drying at and elevated temperature.
Test specimens are placed in an enclosed chamber, and exposed to a changing climate that comprises of the following 2 part repeating cycle. 1.0 hours exposure to a continuous indirect spray of dilute acidified (pH 5.0 to 5.4) salt water solution, which falls-out on to the specimens at a rate of 1.0 to 2.0ml/80cm²/hour, in an ambient chamber temperature (21 to 27C). This is followed by 1.0 hours exposure to an air drying (purge) climate, in a chamber temperature of +35C. The number of cycle repeats and therefore the test duration is variable.
This test is also referred to as a PROHESION test.
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