Weathering of two anti-graffiti protective coatings on concrete paving slabs
| Autor: | Paula María Carmona-Quiroga, Heather Viles, Robert M. J. Jacobs |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
outdoor exposure fluorinated polyurethane Weathering 02 engineering and technology engineering.material 01 natural sciences anti-graffiti wax concrete QUV weathering durability coating accelerated ageing Coating 0103 physical sciences Materials Chemistry Composite material 010302 applied physics Wax Surfaces and Interfaces 021001 nanoscience & nanotechnology Graffiti Durability Surfaces Coatings and Films lcsh:TA1-2040 visual_art visual_art.visual_art_medium engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology UVB Radiation Water spray |
| Zdroj: | Coatings; Volume 7; Issue 1; Pages: 1 Coatings, Vol 7, Iss 1, p 1 (2016) |
| Popis: | The durability of anti-graffiti coatings is of special relevance since, unlike other protective treatments, they are not only affected by environmental factors, but also by often aggressive cleaning procedures. However, little is known about the long-term performance of either permanent or sacrificial coatings. This study explores the durability of two commercial coatings on concrete paving slabs under both natural and artificial ageing tests. The results of this research show that a fluorinated polyurethane and a crystalline micro wax weathered in less than 2000 h in a chamber with UVB radiation and after one year of outdoor exposure in the south of England. The former weathered by getting yellow and dark, and eventually, only under the accelerated ageing test, by losing its adhesion to the concrete slabs, and the latter weathered by getting dark, cracked and by reducing its water repellency under natural conditions. Cleaning efficiency of the protected surfaces from graffiti paints was therefore diminished, particularly when pressurized water spray was used on the polyurethane coated surfaces, since the treatment was partially removed and the concrete surface eroded. |
| Databáze: | OpenAIRE |
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