Degradation of solar glass mirrors paints at marine outdoor site

Guerguer, Mohamed; Karim, Mounia; Naamane, Sanae; Edfouf, Zineb; Raccurt, Olivier

doi:10.1063/1.5067232

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Every three months the surface degradations of aged mirrors are characterized in laboratory by a Nikon LV150 optical microscope (Nikon Instruments Europe BV, Amsterdam, The Netherlands). The results of these analyses are discussed in a previous publication [6,23].…”

Section: Analysis Of Mirrors Degradationmentioning

confidence: 96%

“…The degradation of paint films alters their protective role and causes corrosion of reflective layer and, therefore, decreases the lifetime of solar mirrors. Depending to their application, several factors could influence the durability of paints, such as temperature, solar irradiation, humidity, pollution, and moisture [23,24]. The resistance of paint coatings to environmental stress is usually evaluated in term of changes in physical properties or appearance.…”

Section: Introductionmentioning

confidence: 99%

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Chemical Degradation and Color Changes of Paint Protective Coatings Used in Solar Glass Mirrors

et al. 2021

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This paper reports a study of the influence of outdoor natural aging on paint coatings applied to the back of three commercial solar glass mirrors (A1, C2, and D2) under two different exposure environments (marine and desert) in Morocco for a period of about three years. The aging assessment was carried out through colorimetric measurements and FTIR-ATR (Attenuated total reflection-Fourier transform infrared) analyses of the top coat paints. The obtained results demonstrate that the tested coating system had a high resistance at the desert site. Under the desert environment, no obvious changes to the coating occurred after 350 days. However, at the marine site, some color changes were detected, and the coating got yellow and more matte, especially for mirror A1. FTIR-ATR analyses have indicated many modifications in the intensity of many bonds of infrared spectra especially for paint of this mirror type (A1). This chemical degradation is not only due to UV degradation but also related to many factors, such as humidity, salinity, and rainfall. This finding was concluded after the faster degradation observed on samples exposed at the marine site. The present study confirms the need to use different exposure environments for testing the limits of new protective systems for solar glass mirrors rather than using only the real service conditions. Finally, accelerated tests are necessary for understanding the effect of each degrading parameter and their results should be compared to outdoor tests data for a complete analysis of coatings durability.

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Section: Analysis Of Mirrors Degradationmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%