Environmental effects on materials: The effect of the air pollutants SO2, NO2, NO and O-3 on the corrosion of copper, zinc and aluminium. A short literature survey and results of laboratory exposures
Environmental effects on materials: The effect of the air pollutants SO2, NO2, NO and O-3 on the corrosion of copper, zinc and aluminium. A short literature survey and results of laboratory exposures
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DOI：
10.1016/s0010-938x(97)00047-4
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发表时间：
1997-09-01
影响因子：
8.3
通讯作者：
Faller, M
中科院分区：
文献类型：
--
作者：
Oesch, S;Faller, M
铜、锌和铝的实验室暴露在含有单一空气污染物（SO2、NO2、NO、O-3）的潮湿空气和实验室空气中进行，以研究它们在大气腐蚀中的作用。实验选择了户外暴露中通常遇到的实际污染物供应率。一些实验导致腐蚀产物的形成，其形态通常在户外暴露期间形成。空气污染物二氧化硫、二氧化氮，尤其是臭氧在所研究材料的大气降解中起着至关重要的作用。臭氧对铜的腐蚀作用最强，其次是二氧化氮和二氧化硫。在这些实验中鉴定了真实的腐蚀产物，例如赤铜矿 (Cu2O)、碱式硝酸铜和碱式硫酸铜。二氧化硫对锌的腐蚀作用远远超过其他空气污染物的影响。实验导致形成硫酸锌，其在测试条件（相对湿度：90%）下是水溶性的。臭氧在铝的腐蚀中起着重要作用，而硫和二氧化氮的影响要小得多。本工作总结了最近发现的上述空气污染物的影响，并提出了在实际测试条件下单一空气污染物对铜、锌和铝腐蚀影响的比较研究结果。通过扫描电子 (SEM/EDX) 以及部分俄歇电子显微镜 (AES) 研究了腐蚀表面的微观结构。使用 X 射线衍射 (XRD) 和离子色谱 (IC) 分析腐蚀产物。还报告了重量分析的结果。 (C) 1997 爱思唯尔科学有限公司。
Laboratory exposures of copper, zinc and aluminium were carried out in humid air containing single air pollutants (SO2, NO2, NO, O-3) and laboratory air in order to investigate their role in atmospheric corrosion. Realistic pollutant supply rates as normally encountered in outdoor exposures were chosen for the experiments. Some experiments resulted in the formation of corrosion products with morphologies commonly formed during outdoor exposure. The air pollutants sulphur dioxide, nitrogen dioxide and especially ozone play a crucial role in the atmospheric degradation of the materials investigated. Ozone has the strongest effect on the corrosion of copper followed by nitrogen dioxide and sulphur dioxide. Realistic corrosion products such as cuprite (Cu2O), basic copper nitrates and basic copper sulfates were identified in these experiments. The effect of sulphur dioxide exceeds by far the effects of the other air pollutants in the corrosion of zinc. The experiments resulted in the formation of zinc sulphates, which are water-soluble at the test conditions (relative humidity: 90%). Ozone plays a significant role in the corrosion of aluminium, while the effect of sulphur and nitrogen dioxide was considerably smaller. The present work summarises recently discovered effects of the air pollutants mentioned and presents results of a comparative study on the effects of single air pollutants on the corrosion of copper, zinc and aluminium under realistic test conditions. The microstructures of the corroded surfaces were investigated by scanning electron (SEM/EDX) and also partially by Auger electron microscopy (AES). Corrosion products were analysed using X-ray diffraction (XRD) and ion chromatography (IC). Results from gravimetric evaluation are also reported. (C) 1997 Elsevier Science Ltd.