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Norm

ISO 9227:2022

Issue date: 2022 11 11

Corrosion tests in artificial atmospheres — Salt spray tests

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-acce...
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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
2022 11 11
Corrosion tests in artificial atmospheres — Salt spray tests
Norm
ISO 9227:2017
2017 03 17
Corrosion tests in artificial atmospheres — Salt spray tests
Norm
ISO 9227:2012
2012 05 15
Corrosion tests in artificial atmospheres — Salt spray tests
Norm
ISO 9227:2006
2006 07 06
Corrosion tests in artificial atmospheres — Salt spray tests
Norm
ISO 7253:1996
1996 12 12
Paints and varnishes — Determination of resistance to neutral salt spray (fog)
Norm
ISO 9227:1990
1990 12 13
Corrosion tests in artificial atmospheres — Salt spray tests
Norm
ISO 7253:1984
1984 05 01
Paints and varnishes — Determination of resistance to neutral salt spray
Norm
ISO 3768:1976
1976 11 01
Metallic coatings — Neutral salt spray test (NSS test)
Norm
ISO 3769:1976
1976 11 01
Metallic coatings — Acetic acid salt spray test (ASS test)
Norm
ISO 3770:1976
1976 11 01
Metallic coatings — Copper-accelerated acetic acid salt spray test (CASS test)
Norm
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