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Detection of corrosion on silvered glass reflectors via image processing

2025-03Journal article Open access
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datacite.subject.fosEngenharia e Tecnologia::Engenharia dos Materiais
datacite.subject.fosEngenharia e Tecnologia::Outras Engenharias e Tecnologias
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
dc.contributor.authorWiesinger, Florian
dc.contributor.authorBaghouil, Sarah
dc.contributor.authorLe Baron, Estelle
dc.contributor.authorCollignon, Romain
dc.contributor.authorSantos, Filipa
dc.contributor.authorCunha Diamantino, Teresa
dc.contributor.authorCatarino, Isabel
dc.contributor.authorFacão, Jorge
dc.contributor.authorFerreira, Cristina
dc.contributor.authorPáscoa, Soraia
dc.contributor.authorSutter, Florian
dc.contributor.authorFernández-García, Aránzazu
dc.contributor.authorWette, Johannes
dc.date.accessioned2025-02-19T17:39:07Z
dc.date.available2025-02-19T17:39:07Z
dc.date.issued2025-03
dc.description.abstractABSTRACT: A novel characterization technique based on image analysis is presented, intended to complement state-of-the-art reflectometer measurements. The technique is developed by experts from different laboratories (OPAC, AGC, CEA and LNEG), which subsequently conduct two Round Robin experiments on corroded solar reflectors for validation. Regarding the inter-comparability, it is found that parameters like the corrosion spot density or the penetration maximum on coated edges exhibit an average coefficient of variation of 62.6 % and 54.9 %. Better agreement is found for parameters like the total corroded area and the maximum edge corrosion penetration, with coefficients of variation of 14.3 % and 13.4 %, respectively. The developed methodology is further applied during a 68-month lasting outdoor exposure campaign of two types of solar reflectors at two representative sites, one exhibiting corrosivity class C2 and the other C3. On the commercial coating RL1, a total corroded area of 59 mm2 and 426 mm2 is measured after the outdoor exposure on the C2 and the C3 site, respectively, while on the novel low-lead coated reflector RL3 corresponding values are 280 mm2 and 1308 mm2. This shows the superior quality of the coating RL1 in terms of corrosion resistance. Furthermore, the analysis highlights the importance of proper edge sealing for corrosion protection, since corrosion penetration is increased by a factor between 1.3 and 4.0 if the edges are unprotected. The reflectance decrease after the outdoor exposure is regarded as negligible (0.000 - 0.005), thus not permitting any of the conclusions that are made from the novel image analysis technique.eng
dc.identifier.citationWiesinger, F., Baghouil, S., Le Baron, E., Collignon, R., Santos, F., Diamantino, T.C., Catarino, I., Facão, J., Ferreira, C., Páscoa, S., Sutter, F., Fernández-García, A. & Wette, J. (2025) Detection of corrosion on silvered glass reflectors via image processing. In: Results in Engineering, 2025, vol. 25, article nº 103781. https://doi.org/10.1016/j.rineng.2024.103781
dc.identifier.doi10.1016/j.rineng.2024.103781
dc.identifier.issn2590-1230
dc.identifier.urihttp://hdl.handle.net/10400.9/5595
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationGreenCOAT - Green high-performance and low-friction interfaces tailored by the reactivity of novel DLC coatings and ionic liquids
dc.relation.hasversionhttps://doi.org/10.1016/j.rineng.2024.103781
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectMaterials
dc.subjectCorrosion
dc.subjectDurability
dc.subjectConcentrated solar power
dc.subjectImage processing
dc.titleDetection of corrosion on silvered glass reflectors via image processingeng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleGreenCOAT - Green high-performance and low-friction interfaces tailored by the reactivity of novel DLC coatings and ionic liquids
oaire.awardURIhttp://hdl.handle.net/10400.9/5594
oaire.citation.titleResults in engineering
oaire.citation.volume25
oaire.fundingStreamCEEC IND5ed
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameWiesinger
person.familyNameLe Baron
person.familyNameCollignon
person.familyNameCunha Diamantino
person.familyNameCatarino
person.familyNameFacão
person.familyNameFerreira
person.familyNamePáscoa
person.familyNameSutter
person.familyNameFernández-García
person.familyNameWette
person.givenNameFlorian
person.givenNameEstelle
person.givenNameRomain
person.givenNameTeresa
person.givenNameIsabel
person.givenNameJorge
person.givenNameCristina
person.givenNameSoraia
person.givenNameFlorian
person.givenNameAránzazu
person.givenNameJohannes
person.identifier.ciencia-idA81C-1FE7-1D42
person.identifier.ciencia-idE01B-E2EC-BD82
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person.identifier.orcid0000-0001-6044-4306
person.identifier.orcid0000-0003-1389-5176
person.identifier.ridG-5063-2017
person.identifier.scopus-author-id6507511941
person.identifier.scopus-author-id35781507600
person.identifier.scopus-author-id56202276800
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