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Thermally modified wood: assessing the impact of weathering on mechanical stren...

Godinho, Delfina; Lourenco, Ana; Araújo, Solange; Machado, José Saporiti; Nunes, Lina; Duarte, Marta; Duarte, Sónia; Ferreira, Cristina; Quilhó, Teresa

ABSTRACT: The main objective of this study was to evaluate the mechanical properties of three thermal-modified wood species when exposed to weathering in urban and maritime/industrial environments and their durability against subterranean termites. The wood species studied were Maritime pine, ash, and blackwood acacia. All wood samples were exposed to two different environments (urban and maritime/industrial) f...

Data: 2025   |   Origem: Repositório do LNEG

Comparison of the corrosion of ferritic and austenitic stainless steel (AISI 43...

Gil, Mafalda; Pedrosa, Fátima; Paiva Luís, Teresa; Figueira Vasques, Isabel; Oliveira, Fernando; Cunha Diamantino, Teresa

ABSTRACT: This study focuses on the corrosion rates and mechanisms of two stainless steels, austenitic AISI 316L and ferritic AISI 430, in contact with a eutectic mixture of LiNaK carbonates in long-term tests at 650 degrees C. The selection of these two stainless steels was based on their differences, both in their intrinsic characteristics and in the cost associated with each one. The research also underscore...

Data: 2025   |   Origem: Repositório do LNEG

Detection of corrosion on silvered glass reflectors via image processing

Wiesinger, Florian; Baghouil, Sarah; Le Baron, Estelle; Collignon, Romain; Santos, Filipa; Cunha Diamantino, Teresa; Catarino, Isabel; Facão, Jorge

ABSTRACT: 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 th...

Data: 2025   |   Origem: Repositório do LNEG

Fire-resistant materials: characterization and thermal behavior of intumescent ...

Donato, Mariana; Esteves, M. Alexandra; Capelo, Anabela; Oliveira, Fernando; Ferreira, Cristina; Alves, Isabel N.; Morgado, Vanessa; Correia, Jose B.

Data: 2025   |   Origem: Repositório do LNEG

Dielectric UV filters for protection of fire-resistant glass based on intumesce...

Silva, Ricardo Magno Lopes; Hashim, Hurraira; Roy, Deepto; Oliveira Fernandes, Carolina; Oliveira, Kevin; Leitão Pinheiro, Xavier Alexandre

ABSTRACT: Structures such as OLEDs, perovskite solar cells, intumescent glasses, and other components in modern devices and buildings contain materials suscep-tible to degradation when exposed to UV radiation, requiring protection to with-stand outdoor environmental conditions. In this work, multilayer coating config-ured as a Bragg Reflector on glass is employed as spectral filtering to protect the intumescent...

Data: 2025   |   Origem: Repositório do LNEG

Protection of Steel Structures against Fire and Corrosion by Paint Coatings: A ...

Ferreira, Cristina; Gonçalves, Rita; Alves, Isabel N.; Vieira, Ana; Donato, Mariana; Morgado, Vanessa; Silva, Helena

ABSTRACT: Steel structural systems in modular construction must be protected against corrosion and fire exposure. The durability of both protective properties plays a key role in ensuring long-term service life and minimizing maintenance costs. The present work aims to validate anticorrosive protection systems for steel structures, with and without fire protection properties, evaluating degradation mechanisms a...

Data: 2025   |   Origem: Repositório do LNEG

Exploring photozincographic metal plates collections: Manufacturing techniques ...

Ioaneș, Alexandra; Roldão, Élia; Cunha Diamantino, Teresa; Tissot, Isabel

ABSTRACT: This study explores the materials, manufacturing processes, and corrosion behavior of photozincographic plates from the Lactário Museum in Lisbon, Portugal. Analysis of thirty-three historical plates (1927–1971) and three non-historical plates using stereomicroscopy, micro-X-ray fluorescence, X-ray diffraction, and accelerated aging tests revealed that the plates are primarily composed of zinc with tr...

Data: 2025   |   Origem: Repositório do LNEG

NEWS4CSP Project: New Coatings Approaches to Protect Metallic Materials From He...

Cunha Diamantino, Teresa; Pedrosa, Fátima; Paiva Luís, Teresa; Ferreira da Silva, Eduardo; Gonçalves, Francisco; Monteiro, Renato; Cardoso, João

ABSTRACT: The efficiency of Concentrated Solar Power technologies increases with the opera-tion temperature of the power block, which can be achieved using advanced power cycles operating at temperatures ≥650°C. Molten Salt (MS) based HTF have been facing critical chal-lenging issues of severe corrosion and lower specific heat capacity. This paper aims to present the NEWS4CSP project to the CSP scientific commu...

Data: 2025   |   Origem: Repositório do LNEG

Intumescent Gels for Fire-Resistant Glass: Thermal Insulation, UV Protection, a...

Esteves, M. Alexandra; Capelo, Anabela; Donato, Mariana; Oliveira, Fernando; Ferreira, Cristina; Alves, Isabel N.; Correia, Jose B.

Data: 2025   |   Origem: Repositório do LNEG

Intumescent Gels for Fire-Resistant Glass: Thermal Insulation, UV Protection, a...

Esteves, M. Alexandra; Capelo, Anabela; Donato, Mariana; Oliveira, Fernando; Ferreira, Cristina; Alves, Isabel N.; Correia, Jose B.

Data: 2025   |   Origem: Repositório do LNEG

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