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BS EN ISO 9227:2022

BS EN ISO 9227:2022

$142.49

Corrosion tests in artificial atmospheres. Salt spray tests

Published By Publication Date Number of Pages
BSI 2022 32
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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.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
10 3 Terms and definitions
4 Principle
5 Test solutions
5.1 Preparation of the sodium chloride solution
11 5.2 Preparation of each test solution with pH adjustment
5.2.1 pH of the salt solution
5.2.2 Neutral salt spray test
5.2.3 Acetic acid salt spray test
12 5.2.4 Copper-accelerated acetic acid salt spray test
5.3 Filtration
6 Apparatus
6.1 Component protection
6.2 Spray cabinet
6.3 Heater and temperature control
6.4 Spraying device
13 6.5 Collecting devices
14 6.6 Re-use
7 Method for evaluating cabinet corrosivity
7.1 General
7.2 Reference specimens
15 7.3 Arrangement of the reference specimens
7.4 Determination of mass loss (mass per area)
7.5 Satisfactory performance of cabinet
16 8 Test specimens
9 Arrangement of the test specimens
17 10 Operating conditions
11 Duration of tests
18 12 Treatment of test specimens after test
12.1 General
12.2 Non-organic coated test specimens: metallic and/or inorganic coated
12.3 Organic coated test specimens
12.3.1 Scribed organic coated test specimens
12.3.2 Organic coated but not scribed test specimens
13 Evaluation of results
19 14 Test report
21 Annex A (informative) Example schematic diagram of one possible design of spray cabinet with means for optional treating fog exhaust and drain
23 Annex B (informative) Complementary method for evaluating cabinet corrosivity using zinc reference specimens
25 Annex C (normative) Preparation of specimens with organic coatings for testing
26 Annex D (informative) Required supplementary information for testing test specimens with organic coatings
27 Annex E (informative) Examples of arrangement of the collecting devices
29 Annex F (informative) Interlaboratory comparison for reference specimens
31 Bibliography

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BS EN ISO 9227:2022
$142.49