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金属在大气环境因素(温度、雨、日光、风、大气污染物等)作用下产生的重量损耗性能变坏现象。大气腐蚀的分类方法很多,按空气中所含杂质的类型可分为:海洋大气腐蚀、工业大气腐蚀和农村大气腐蚀。按大气中水份含量可分为:湿大气腐蚀(水分在金属表面成滴凝聚)、潮大气腐蚀(金属表面形成很薄的液膜)、和干燥大气腐蚀(金属表面没有水膜),前两种属电化学腐蚀,后一种属化学腐蚀。大气腐蚀的特点是腐蚀速度多与相
Metal in the atmospheric environment factors (temperature, rain, sunlight, wind, air pollutants, etc.) under the weight loss caused by the phenomenon of deterioration. Atmospheric corrosion classification of many, according to the type of impurities contained in the air can be divided into: atmospheric corrosion of the atmosphere, industrial atmospheric corrosion and rural atmospheric corrosion. According to the atmospheric moisture content can be divided into: wet atmospheric corrosion (moisture droplets in the metal surface condensation), tidal atmospheric corrosion (metal surface to form a thin liquid film), and dry atmospheric corrosion (metal surface without water film), before Two kinds of electrochemical corrosion, the latter is a chemical corrosion. Atmospheric corrosion is characterized by corrosion rate and phase