BS EN 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.

It also describes the method employed to evaluate the corrosivity of the test cabinet environment.

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. Such details are provided in the appropriate product specifications.

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.

The neutral salt spray (NSS) test particularly applies to

• metals and their alloys,
• metallic coatings (anodic and cathodic),
• conversion coatings,
• anodic oxide coatings, and
• organic coatings on metallic materials.

The acetic acid salt spray (AASS) test is especially useful for testing decorative coatings of copper + nickel + chromium, or nickel + chromium. It has also been found suitable for testing anodic and organic coatings on aluminium.

The copper-accelerated acetic acid salt spray (CASS) test is useful for testing decorative coatings of copper + nickel + chromium, or nickel + chromium. It has also been found suitable for testing anodic and organic coatings on aluminium.

The salt spray methods are all suitable for checking that the quality of a metallic material, with or without corrosion protection, is maintained. They are not intended to be used for comparative testing as a means of ranking different materials relative to each other with respect to corrosion resistance or as means of predicting long-term corrosion resistance of the tested material.


Cross References:
ISO 17872:2007 Ed 1 (R10)
ISO 4628-8:2012 ED2
ISO 8407:2009 Ed 2
ISO 1514:2016
ISO 4623-2:2016
ISO 4628-3:2016
ISO 2808:2007 Ed 4 (R10)
ISO 10289:1999 (R11)
ISO 4628-2:2016
ISO 4628-1:2016
ISO 4628-5:2016
ISO 4628-4:2016
ISO 8993:2010 Ed 2
ISO 3574:2012 ED5
ISO 8044:2015 ISO 1456:2009 Ed 4
ISO 15528:2013 ED2
ISO 7599:2010 Ed 2
ISO 1513:2010 Ed 4
ISO 3270:1984 (R08)
ISO 4527:2003 (R09) Ed 2
ISO 3613:2010 Ed 3
ISO 3696:1987
ISO 4520:1981(R09)
ASTM B117 - 16
ISO 8994:2011 Ed 2


All current amendments available at time of purchase are included with the purchase of this document.