色漆和清漆.耐循环腐蚀条件的测定.第3部分:汽车结构材料和部件涂层系统的试验

[中文适用范围]： 本文件规定了一种基于循环腐蚀试验的方法，用于测试使用铝、钢或镀锌钢涂层系统的汽车的腐蚀保护。 该测试方法使用腐蚀条件（温度和湿度斜坡以及盐雾）来创建真实的腐蚀模式。 这些腐蚀模式对于汽车来说是典型的，并且在足够相似的保护涂层系统的情况下它们是可比的。 特别是，加速测试研究了由于对涂层的特定人为损坏而导致的分层/腐蚀蠕变。 还包括表面和边缘腐蚀的研究或粘合剂样本或部件的研究。 这种循环腐蚀测试也适用于测试法兰区域或间隙附近的腐蚀。 本文件是为评估汽车行业中的涂层基材（测试样本、车身和安装零件）而制定的。 其他应用，例如具有未涂漆金属涂层的组件，不属于标准化工作的范围。 本文件最初是为铝、钢或镀锌钢上的涂层系统开发的，但也可用于评估其他金属及其合金上的涂层系统的耐腐蚀性。 [外文原描述]： This document specifies a method based on a cyclic corrosion test for testing the corrosion protection of automobiles using coating systems on aluminium, steel or galvanized steel. The test method uses corrosive conditions (temperature and humidity ramps and salt spray) to create realistic corrosion patterns. These corrosion patterns are typical for automobiles, and they are comparable in the case of sufficiently similar protective coating systems. In particular, the accelerated test investigates the delamination/corrosion creep that results from defined artificial damage to a coating. Investigations of surface and edge corrosion or investigations of adhesive specimens or components are also covered. This cyclic corrosion test is also suitable for testing corrosion in flanged areas or near gaps. This document was developed for the assessment of coated substrates (test specimens, bodywork and mounted parts) in the automotive industry. Other applications, such as components with unpainted metallic coatings, were not part of the scope of the standardization work. This document was originally developed for coating systems on aluminium, steel or galvanized steel but it can also be used for the assessment of the corrosion resistance of coating systems on other metals and their alloys.