ISO 9227 is particularly useful for detecting discontinuities, pores and damages in organic and inorganic coatings as well as for assessing the corrosion resistance of metallic materials.However, it is important to be aware of the fact that there is no direct correlation between resistance to the action of salt spray and resistance to corrosion as the corrosion stress in end-use conditions are significantly different than the ones during testing.In this way, results should not be used as a comparative guide to the long-term behavior of different coating systems or to rank different materials relative to each other.
Micom offers ISO 9227 testing as part of its corrosion test services. Typically, the NSS test applies to metals and their alloys, metallic coatings (anodic and cathodic), conversion coatings, anodic oxide coatings and organic coatings on metallic materials. As for the AASS and CASS tests, they are especially useful for testing decorative coatings made of copper, nickel and chromium or only nickel and chromium. AASS and CASS have also been found suited for testing anodic coatings on aluminum. This angle shall, in all cases, be within the limits 15 o to 25 o. These test methods are largely equivalent to ASTM D714 and ASTM D610. However, the positions of specimens during testing must be between 15 o to 25 o for ISO 9227 and between 15 o to 30 o for ASTM B117. As for the Acetic acid salt spray (AASS), it is equivalent to the Acetic aide-salt spray test in annex A1 of ASTM G85. Nevertheless, the position of specimens during exposure must be between 6 and 45 o for ASTM G85 while it must be between 15 o to 25 o for ISO 9227. It will be our pleasure to answer your questions and help you with your custom testing requirements. By continuing to use our site, you accept our use of cookies. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. But opting out of some of these cookies may have an effect on your browsing experience. ![]() ![]()
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