人造大气中的腐蚀试验 - 盐雾试验

[中文适用范围]： 本文件规定了进行中性盐雾（NSS）、醋酸盐雾（AASS）和铜加速醋酸盐雾（CASS）试验以评估金属材料耐腐蚀性能时使用的设备、试剂和程序。 金属材料，具有或不具有永久或临时的腐蚀保护。 它还描述了用于评估测试柜环境腐蚀性的方法。 它没有指定测试样本的尺寸或类型、特定产品使用的暴露时间或结果的解释。 相应的产品规格中提供了此类详细信息。 盐雾测试特别适用于检测某些金属、有机、阳极氧化和转化涂层中的不连续性，例如孔隙和其他缺陷。 NSS 测试特别适用于： ——金属及其合金； ——金属涂层（阳极和阴极）； ——转化涂层； ——阳极氧化涂层； ——金属材料上的有机涂层。 AASS 测试对于测试铜+镍+铬或镍+铬的装饰涂层特别有用。 它还被发现适用于测试铝上的阳极和有机涂层。 CASS 测试适用于测试铜+镍+铬或镍+铬的装饰涂层。 它还被发现适用于测试铝上的阳极和有机涂层。 盐雾方法都适合检查金属材料的质量，无论是否有腐蚀保护。 它们无意用于比较测试，作为对不同材料在耐腐蚀性方面相对于彼此进行排名的手段，或作为预测被测材料的长期耐腐蚀性的手段。 [外文原描述]： 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.