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金属制品在使用过程中,会经常受到大气的腐蚀,电镀与涂漆常作为防止金属腐蚀的主要手段。如何考验电镀层或涂漆层的质量(即耐久性),最可靠的办法是根据实际使用条件进行大气暴露试验。但是,天然大气暴露试验需要花费相当长的时间。为了缩短试验时间,就用人工加速的方法来模拟天然气候条件,使之在较短的时间内能够判断镀层和漆膜的耐久性。在天然气候条件的各种因素中,主要是光、热、湿度、水、氧、臭氧和有害的工业气体(如二氧化硫、二氧化碳、硫化氢)等,
Metal products in the use of the process, often subject to atmospheric corrosion, electroplating and painting often used as the main means to prevent metal corrosion. The most reliable way to test the quality (ie durability) of electroplated or painted layers is to conduct atmospheric exposure tests based on actual conditions of use. However, natural atmospheric exposure tests can take quite a long time. In order to shorten the test time, artificial accelerated method to simulate the natural climatic conditions, so that in a short period of time can determine the durability of coating and paint film. Among the various factors of natural climatic conditions are mainly light, heat, humidity, water, oxygen, ozone and harmful industrial gases (such as sulfur dioxide, carbon dioxide and hydrogen sulfide)