ISO 9227:2022
Corrosion tests in artificial atmospheres — Salt spray tests

Standard No.

ISO 9227:2022

Release Date

2022

Published By

International Organization for Standardization (ISO)

Latest

ISO 9227:2022

Scope

This document 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 NSS test is particularly applicable to: — metals and their alloys; — metallic coatings (anodic and cathodic); — conversion coatings; — anodic oxide coatings; — organic coatings on metallic materials. The 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 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.

ISO 9227:2022 Referenced Document

• ISO 1514 Paints and varnishes - Standard panels for testing
• ISO 17872 Paints and varnishes — Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing
• ISO 2808 Paints and varnishes — Determination of film thickness
• ISO 3574 Cold-reduced carbon steel sheet of commercial and drawing qualities
• ISO 4623-2:2016 Paints and varnishes - Determination of resistance to filiform corrosion - Part 2: Aluminium substrates
• ISO 8044 Corrosion of metals and alloys — Vocabulary
• ISO 8407 Corrosion of metals and alloys

ISO 9227:2022 history

• 2022 ISO 9227:2022 Corrosion tests in artificial atmospheres — Salt spray tests
• 2017 ISO 9227:2017 Corrosion tests in artificial atmospheres - Salt spray tests
• 2012 ISO 9227:2012 Corrosion tests in artificial atmospheres.Salt spray tests
• 2006 ISO 9227:2006 Corrosion tests in artificial atmospheres - Salt spray tests
• 1990 ISO 9227:1990 Corrosion tests in artificial atmospheres; salt spray tests