Acetic Acid Salt Spray (Fog) Testing ASTM B287

Can be used to test the relative resistance to corrosion of inorganically and organically coated ferrous and non-ferrous metals, when exposed to an acetic acid salt spray climate at an elevated temperature.


Test specimens are placed in an enclosed chamber and exposed to a continuous indirect spray of acidified (pH 3.1to 3.3) salt water solution, which falls-out on to the specimens at a rate of 0.75 to 2.0ml/80cm²/hour, in a chamber temperature of +35C. This climate is maintained under constant steady state conditions. The test duration is variable.


This test is also referred to as an ASS test.


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Note; ASTM B287 has been replaced by ASTM G85 annex A1