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The atmospheric corrosion mechanism of 55Al-Zn coating on steel

机译:钢上55%Al-Zn涂层的大气腐蚀机理

摘要

This paper presents the results of a study aimed at understanding the atmospheric Corrosion mechanism of the 55%Al-Zn coating (Galvalume) on steel and a comparison with the behaviour of galvanized sheets (Sendzimir). Research has been carried out in different types of atmosphere in Spain, Brazil and Portugal. Unlike the galvanized coating, which suffers a generalized attack of its surface, the 55%Al-Zn coating undergoes a localized type of attack which commences in the interdendritic regions of the material. An analysis is also made of the additional protection which may be provided by a chemical passivating treatment applied on both types of coating. © 1997 Elsevier Science Ltd.
机译:本文介绍了一项研究结果,旨在了解钢上55%Al-Zn涂层(Galvalume)的大气腐蚀机理,并与镀锌板(Sendzimir)的性能进行比较。已经在西班牙,巴西和葡萄牙的不同类型的大气中进行了研究。与镀锌涂层会遭受表面的普遍侵蚀不同,55%Al-Zn涂层会经历局部腐蚀,这种腐蚀始于材料的树枝状区域。还分析了可以通过对两种类型的涂层进行化学钝化处理来提供的额外保护。 ©1997爱思唯尔科学有限公司。

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