Write a Chinese guide or abstract (no more than 200 words) for the following criterion. ISO 9227-2022 corrosion test in artificial atmosphere salt spray test Instruments, reagents and procedures for neutral salt spray (NSS), acetic acid spray (ASS) and copper plus acetic acid spray (CASS) tests are described in detail to assess the corrosion resistance of metallic materials, with or without permanent or temporary corrosion protection. The method for evaluating the environment corrosion of the test cabinet is also introduced. It does not specify the size or type of specimen, the exposure period for a particular product or the interpretation of the results. These details are provided in the appropriate product specifications. Salt spray tests are particularly useful for detecting discontinuities such as pores and Miscellaneous defects in certain metals, organic, anode oxides, and conversion coatings. NSS testing is particularly suitable for: Metals and their alloys; Metallic coatings (anode and cathode); Conversion Coatings; Anode oxide coatings; Organic coatings on metallic materials. The ASS test is especially used to test Decorative Coatings of Copper + Nickel + Chromium or Nickel + Chromium. It has also been found to be suitable for testing of aluminium anodes and organic coatings. The CASS test is used to test Decorative Coatings of Copper + Nickel + Chromium or Nickel + Chromium. It has also been found to be suitable for testing of aluminum anodes and organic coatings. Salt spray methods are suitable for checking whether the masses of metallic materials are maintained, regardless of corrosion protection. They are not intended to be used for comparative testing, as a means of relative ranking of different materials in terms of corrosion resistance, or as a means of predicting the long-term corrosion resistance of the material under test.
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