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《Corrosion tests in artificial atmospheres — Salt spray tests (Revised)》 本標準規(guī)定了采用中性鹽霧(NSS)、乙酸鹽霧(AASS)以及銅加速乙酸鹽霧(CASS)試驗來測定金屬材料(無論是否具有長久或暫時的防腐蝕能力)抗腐蝕性所需要的儀器、試劑和操作程序。
本“標準”還描述了評估試驗耐環(huán)境的腐蝕性所采用的方法。
本標準未規(guī)定試驗樣本的尺寸，用于某種特定產(chǎn)品的腐蝕期，或者對結果的解釋。此類詳細信息在相應的產(chǎn)品規(guī)格中給出。
鹽霧試驗對于測定涂層間斷，如某些金屬涂層、有機涂層、陽極氧化涂層以及轉化涂層中的小孔及其他缺陷特別適用。
ISO 9227:2017 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 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. It has also been found suitable for testing anodic and organic coatings on aluminium.
The copper-accelerated acetic acid salt spray (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.
kingjo-FOG CRH鹽霧試驗箱用于ISO 9227-2017中AASS測試的方法
