Panel edge staining
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Panel edge staining is a naturally occurring problem that occurs to anodized aluminium and stainless steel panelling and façades. It is semi-permanent staining that dulls the panel or façade's surface (in particular the edges of the panelling), reducing the natural lustre and shine produced by the anodizing processes used on the aluminium. Panel edge staining may also appear on powder coated aluminium, painted aluminium, stainless steel and titanium surfaces.
Causes
Panel edge staining is the by-product of the build-up of dirt and pollution. It is especially more noticeable on buildings using metallic façades in Asia, and regions close to the equator (such as Florida or South East Asia), as higher rates of air pollution,[1] high levels of humidity and consistent rainfall encourage panel edge staining to develop.
The unique top-to-bottom stain pattern of panel edge staining is caused when the build-up of dirt and pollution is washed from the higher panels to the lower panels of a surface by natural precipitation.[2]
Notes
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- ^ Page Module:Citation/CS1/styles.css has no content.Lelieveld, J.; Crutzen, P. J.; Ramanathan, V.; Andreae, M. O.; Brenninkmeijer, C. A. M.; Campos, T.; Cass, G. R.; Dickerson, R. R.; Fischer, H.; De Gouw, J. A.; Hansel, A.; Jefferson, A.; Kley, D.; De Laat, A. T.; Lal, S.; Lawrence, M. G.; Lobert, J. M.; Mayol-Bracero, O. L.; Mitra, A. P.; Novakov, T.; Oltmans, S. J.; Prather, K. A.; Reiner, T.; Rodhe, H.; Scheeren, H. A.; Sikka, D.; Williams, J. (9 February 2001). "Pollution in South East Asia". Science. 291 (5506): 1031–1036. doi:10.1126/science.1057103. PMID 11161214.
- ^ Page Module:Citation/CS1/styles.css has no content."Solid Aluminum Panels for Exterior Wall Cladding" (PDF). Archived from the original (PDF) on September 28, 2012. Retrieved August 30, 2012.
References
- Page Module:Citation/CS1/styles.css has no content.Davis, Joseph R. (1999). Corrosion of Aluminum and Aluminum Alloys. ASM International. p. 197. ISBN 978-0-87170-629-4.
- Staining of facades By Michael Y. L. Chew, Tan Phay Ping
- Maintenance and Restoration of Architectural Aluminum By Service One, Inc. Technical Paper
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