The salt spray tests are particularly useful for detecting discontinuities, such as pores and other defects, in certain metallic, organic, anodic oxide and conversion coatings.
Such details are provided in the appropriate product specifications. It does not specify the dimensions or types of test specimens, the exposure period to be used for a particular product, or the interpretation of results. It also describes the method employed to evaluate the corrosivity of the test cabinet environment. ISO 9227:2017 specifies the apparatus, the reagents and the procedure to be used in conducting the neutral salt spray (NSS), acetic acid salt spray (AASS) and copper-accelerated acetic acid salt spray (CASS) tests for assessment of the corrosion resistance of metallic materials, with or without permanent or temporary corrosion protection.
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