weathering of two anti-graffiti protective coatings on concrete paving slabs
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ID: 163097
2016
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Abstract
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.
| Reference Key |
carmona-quiroga2016coatingsweathering
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|---|---|
| Authors | ;Paula M. Carmona-Quiroga;Robert M. J. Jacobs;Heather A. Viles |
| Journal | die pharmazie |
| Year | 2016 |
| DOI |
10.3390/coatings7010001
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| URL | |
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