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首页> 外文期刊>Revista de metalurgia >Behaviour of painted aluminium in lbero-American atmospheres
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Behaviour of painted aluminium in lbero-American atmospheres

机译：涂漆铝在美国黑人氛围中的行为

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摘要

Aluminium generally presents good corrosion resistance to the atmosphere. However, unprotected aluminium and aluminium alloys weather outdoors to an ugly grey colour, which deepens to black in industrial atmospheres, and undergo superficial pitting in marine atmospheres, etc. Finishing technologies are applied for their protection and decoration in a wide range of applications. These technologies basically consist of two protection processes: anodizing and painting; the latter going from conventional solvent base paints to modern water-borne, high solids and powder coatings. This paper considers the weathering performance of three paint systems: alkyd, polyurethane and polyester, after more than three years of exposure in a wide spectra of Ibero-American atmospheric conditions. The information reported includes resistance to undercutting corrosion at the scribe, filiform corrosion, fungal attack and change in the physical-chemical properties of the paint surface (loss of gloss, colour changes, chalking, etc.).
机译：铝通常对大气具有良好的耐腐蚀性。但是，未经保护的铝和铝合金在户外会变成丑陋的灰色，在工业环境中会加深为黑色，并在海洋环境中会出现浅点蚀。等等。涂饰技术可在多种应用中用于其保护和装饰。这些技术基本上由两个保护过程组成：阳极氧化和喷漆；后者从传统的溶剂型涂料到现代的水性，高固含量和粉末涂料。本文考虑了三种涂料体系的耐候性能：醇酸树脂，聚氨酯和聚酯，在伊比利亚-美洲大范围的大气环境中暴露三年以上后，表现出耐候性。报告的信息包括对划线的底切腐蚀的抵抗力，丝状腐蚀，真菌侵袭以及油漆表面的物理化学性质的变化（光泽度下降，颜色变化，粉化等）。

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