Effectiveness of antigraffiti treatments in connection with penetration depth determined by different techniques

Carmona-Quiroga, Paula María; Martínez-Ramírez, S.; Sánchez-Cortés, Santiago; Oujja, M.; Castillejo, Marta; Blanco-Varela, María Teresa

doi:10.1016/j.culher.2009.09.006

Cited by 31 publications

(16 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, in examining the distribution maps (Figure 4c), high contents in C were not found where Ca was detected. The anti-graffiti product mainly remained on the surface in spite of the high porosity of the substrate, which usually enhances the penetration of both the protective product and the paint [28,32]. However, it is worth mentioning that, in some points, the brighter components, due to the Bi in the paint, were found also below the surface ( Figure 4b).…”

Section: Distribution Of the Paintmentioning

confidence: 93%

“…The unsuccessful result, already clear to the visual inspection by the naked eye (Figure 7i-l), left the ∆E* ab values very high. Although the non-impregnating anti-graffiti products usually show a better efficacy [26], in the samples treated with AG1, the presence of the applied product only on the surface did not guarantee satisfactory results, as already found in other highly porous materials [28]. The paint was the only component in the most external layer, while the chemical remover was likely formulated to affect just the protective coating.…”

Section: Efficacy Of the Removal Proceduresmentioning

confidence: 94%

“…However, in order to use the anti-graffiti products for different applications in the field, the performances and durability of these materials as a coating have been investigated on several stone substrates (natural stone, cement, mortar, brick, concrete) [26][27][28][29][30][31][32][33][34] or on metallic surfaces [14,35,36]. Nevertheless, studies dealing with the effects on highly porous stone materials are still limited in the current literature, although in these materials the penetration of the staining agent can be deeper and a good cleaning can be hampered.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of the Distribution of a Spray Paint on the Efficacy of Anti-Graffiti Coatings on a Highly Porous Natural Stone Material

Masieri

Lettieri

2017

Coatings

View full text Add to dashboard Cite

Graffiti on facades often has a heavy impact in social and economic terms, particularly when historical and artistic artefacts are affected. To limit the damages to the surfaces, preventive plans are implemented and anti-graffiti coatings are used as a protective measure. In this study, the distribution of a spray paint inside a highly porous stone, with and without anti-graffiti protection, was investigated. Two commercial sacrificial anti-graffiti systems were used and an acrylic-based paint was applied as staining agent. Environmental scanning electron microscopy and energy-dispersive X-ray spectroscopy (EDS) microanalysis were performed to characterise, from the morphological and chemical point of view, the anti-graffiti coatings and the paint. Maps of the main elements were acquired to locate the different products inside the stone. Chemical removers were used to clean the stained surfaces, then the effectiveness of the cleaning was assessed by visual observations and colour measurements, as well as on the basis of percentage of residual stain. The obtained results highlighted that the anti-graffiti efficacy strongly depended on the characteristics of the applied coating. This latter usually acted as a barrier, but good results were obtained only where the stain did not remain as a separate layer, but penetrated the protective coating. Microcracks in the anti-graffiti coating were able to nullify the protective action.

show abstract

Section: Distribution Of the Paintmentioning

confidence: 93%

Section: Efficacy Of the Removal Proceduresmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of the Distribution of a Spray Paint on the Efficacy of Anti-Graffiti Coatings on a Highly Porous Natural Stone Material

Masieri

Lettieri

2017

Coatings

View full text Add to dashboard Cite

show abstract

“…With wax (S), the contact angle measurements hardly reached 90 • (Table 2). In the literature, it has also been reported [3,4] that permanent anti-graffiti coatings are more hydrophobic than wax-based sacrificial products.…”

Section: Surfacementioning

confidence: 99%

“…Neto et al [3] revealed that a permanent protective coating (fluorinated polymer), which is able to withstand more than one graffiti cleaning cycle, was more effective than a sacrificial coating made of wax. Sacrificial Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Weathering of Two Anti-Graffiti Protective Coatings on Concrete Paving Slabs

2016

View full text Add to dashboard Cite

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.

show abstract

SEM‐EDX, water absorption, and wetting capability studies on evaluation of the influence of nano‐zinc oxide as additive to paraloid B72 solutions used for wooden artifacts consolidation

Trǎistaru

Sandu

Timar

et al. 2012

Microscopy Res & Technique

View full text Add to dashboard Cite

Consolidation of frail, degraded wood is a key issue of wooden cultural heritage conservation. Paraloid B72 is one of the most often used consolidant in conservation practice. The present research aimed at formulating stable consolidation solutions of Paraloid B72 with ZnO nano-additives and at determining the influence of these additives on the penetration pathways, retention of the consolidation material into wood and on the water behavior of the treated wood. The experiments were performed on sound samples of aspen (Populus tremula). The addition of nano-ZnO slightly increased the uptake and retention of the consolidant within the wooden structure and led to hydrophobic surfaces. However, the influence of nano-ZnO additives to the water absorption was not conclusive. Scanning Electron Microscope coupled with an EDX Detector investigation proved vessels, fibers, and interconnecting pits as main pathways of consolidant penetration into the wooden structure as well as the presence and distribution of nano-ZnO.

show abstract

Effectiveness of antigraffiti treatments in connection with penetration depth determined by different techniques

Cited by 31 publications

References 11 publications

Influence of the Distribution of a Spray Paint on the Efficacy of Anti-Graffiti Coatings on a Highly Porous Natural Stone Material

Influence of the Distribution of a Spray Paint on the Efficacy of Anti-Graffiti Coatings on a Highly Porous Natural Stone Material

Weathering of Two Anti-Graffiti Protective Coatings on Concrete Paving Slabs

SEM‐EDX, water absorption, and wetting capability studies on evaluation of the influence of nano‐zinc oxide as additive to paraloid B72 solutions used for wooden artifacts consolidation

Contact Info

Product

Resources

About