Paints & Varnishes – Determination of Resistance to neutral salt spray (fog)
Can be used to test the relative resistance to corrosion of paints and varnishes, when exposed to a salt spray (fog) climate at an elevated temperature.
Test specimens are placed in an enclosed chamber and exposed to a continuous indirect spray of neutral (pH 6.5 to 7.2) salt water solution, which falls-out on to the specimens at a rate of 1.0 to 2.5ml/80cm²/hour, in a chamber temperature of +35C. This climate is maintained under constant steady state conditions. The test duration is variable.
Chamber volumes of less than 400 Litres are not permitted by this test standard.
This test is also referred to as a Neutral Salt Spray or NSS test.