ISO 9227-2017 pdf free.Corrosion tests in artificialatmospheres -Salt spray tests.
This document specifies the apparatus, the reagents and the procedure to be used in conducting theneutral 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 permanentor temporary corrosion protection.lt also describes the method employed to evaluate the corrosivity of the test cabinet environment.lt does not specify the dimensions or types of test specimens, the exposure period to be used for aparticular product, or the interpretation of results.Such details are provided in the appropriate productspecifications.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. Ilt has also been found suitable for testing anodic and organiccoatings on aluminium.
The copper-accelerated acetic acid salt spray (CASs) test is useful for testing decorative coatings ofcopper nickel chromium, or nickel  chromium. it has also been found suitable for testing anodicand organic coatings on aluminium.
The salt spray methods are all suitable for checking that the quality of a metallic material, with orwithout corrosion protection, is maintained.They are not intended to be used for comparative testingas a means of ranking different materials relative to each other with respect to corrosion resistance oras means of predicting longterm corrosion resistance of the tested material.
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies. Forundated references, the latest edition of the referenced document(including any amendments) applies.ISO 9227 pdf download.