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Conservation of an Italian Jewish Textile of the Sixteenth Century / Olga Negnevitsky in Conservation restauration des biens culturels, no.13(1999:mai) (1999-05-01)
Conservation of the Shaft #1 Headgear at the Tsumeb Mine, Namibia in Studies in conservation, Vol.68 N°1-2(2023; January-February) (2023-01-01)
[article]
Titre : Conservation of the Shaft #1 Headgear at the Tsumeb Mine, Namibia : Corrosion Protection Type de document : texte imprimé Année de publication : 2023 Article en page(s) : P. 228-242 Note générale : Article en libre accès (open access).
https://www.tandfonline.com/doi/full/10.1080/00393630.2021.2004007Langues : Anglais (eng) Catégories : Acier -- Composition chimique
Acier de construction -- Corrosion -- Analyse
Acier de construction -- Corrosion -- Mesure
Anticorrosifs -- Conservation et restauration
Assemblages à rivets -- Afrique du Sud-Ouest -- 20e siècle
Constructions métalliques -- Afrique du Sud-Ouest -- 20e siècle -- Corrosion
Constructions métalliques -- Afrique du Sud-Ouest -- Effets du climat
Microscopie électronique à balayage
Mines (sites d'extraction) -- Namibie -- Conservation et restauration
Patrimoine industriel -- Namibie -- Protection
Résines alkydes
Spectroscopie des rayons X
Stabilisants -- Conservation et restaurationIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : The Tsumeb Mine in Namibia represents one of the best-preserved mining sites in the world and is rapidly gaining cross-disciplinary interest among cultural and engineering scientists. Most of the open pit and the shaft mining equipment are still in place, including the ore processing units and the local power plant. The mining area thus deserves recognition as an industrial world heritage site, especially due to the rarity of such locations on the African continent. The Shaft #1 headgear, built in 1924, represents one of the oldest known riveted steel headgears of the Promnitz design worldwide. In contrast to similar steel structures located in the northern hemisphere, it has been exposed to a different rural semi-arid climate since it is located in the Otavi Mountain Land, characterized by semi-annual change of rainy and dry seasons. Parts of the Shaft #1 headgear have remained largely untouched for more than 70 years. Besides its outstanding heritage value, it thus also represents an interesting object for studying the composition of corrosion layers formed on mild steel surfaces when exposed to continental and industrial mining atmospheres. To find a suitable transparent corrosion prevention coating, various on-site coating samples were evaluated after 11 months of outdoor exposure, including Owatrol Oil®, which is based on natural oil and alkyd resin with strong wicking potential. The substance is frequently applied for the conservation of single components but is not yet widely used on large steel structures in the field of industrial heritage conservation. However, it represented the most stable anti-corrosion coating under the local atmospheric conditions in the on-site tests. Thus, the suitability of Owatrol Oil® as a transparent coating for corrosion protection of riveted mild steel structures in such climates was further investigated as a more recent approach for the conservation of large steel structures. Since the protective coatings are exposed to strong UV radiation in the local climate, the addition of a specific UV stabilizer mixture was also tested. For such laboratory tests, two mild steel samples were taken. The first one originated from a diagonal strut of the 1920s and the second one from a handrail mounted in the early 1960s. Using corresponding high-resolution scanning electron microscopy (HR-SEM) and energy-dispersive X-ray spectroscopy (EDX) it was found that the corrosion layers are predominantly composed of lepidocrocite and goethite. A weathering program simulating the specific environmental conditions at Tsumeb in a UV climate chamber was developed and the corrosion resistance of the mild steel surface was subsequently evaluated by potentiodynamic measurements. Such tests proved to be a fast and reliable procedure for ranking the corrosion resistance of the old mild steels. It was found that the long-term corrosion layers already provide significant protection against further corrosion in the simulated environment. However, the study also showed that this can be further improved by the application of the Owatrol Oil® as a protective coating that also seals crevices. The addition of the UV stabilizers, however, led to a significant deterioration in corrosion protection, even in comparison to that of the uncoated long-term corrosion layers on the surface. Regular overcoating seems more advisable for the long-term preservation of the Shaft #1 headgear than modifying the Owatrol Oil® coating with the tested UV-stabilizing additives.
in Studies in conservation > Vol.68 N°1-2(2023; January-February) (2023-01-01) . - P. 228-242[article] Conservation of the Shaft #1 Headgear at the Tsumeb Mine, Namibia : Corrosion Protection [texte imprimé] . - 2023 . - P. 228-242.
Article en libre accès (open access).
https://www.tandfonline.com/doi/full/10.1080/00393630.2021.2004007
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°1-2(2023; January-February) (2023-01-01) . - P. 228-242
Catégories : Acier -- Composition chimique
Acier de construction -- Corrosion -- Analyse
Acier de construction -- Corrosion -- Mesure
Anticorrosifs -- Conservation et restauration
Assemblages à rivets -- Afrique du Sud-Ouest -- 20e siècle
Constructions métalliques -- Afrique du Sud-Ouest -- 20e siècle -- Corrosion
Constructions métalliques -- Afrique du Sud-Ouest -- Effets du climat
Microscopie électronique à balayage
Mines (sites d'extraction) -- Namibie -- Conservation et restauration
Patrimoine industriel -- Namibie -- Protection
Résines alkydes
Spectroscopie des rayons X
Stabilisants -- Conservation et restaurationIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : The Tsumeb Mine in Namibia represents one of the best-preserved mining sites in the world and is rapidly gaining cross-disciplinary interest among cultural and engineering scientists. Most of the open pit and the shaft mining equipment are still in place, including the ore processing units and the local power plant. The mining area thus deserves recognition as an industrial world heritage site, especially due to the rarity of such locations on the African continent. The Shaft #1 headgear, built in 1924, represents one of the oldest known riveted steel headgears of the Promnitz design worldwide. In contrast to similar steel structures located in the northern hemisphere, it has been exposed to a different rural semi-arid climate since it is located in the Otavi Mountain Land, characterized by semi-annual change of rainy and dry seasons. Parts of the Shaft #1 headgear have remained largely untouched for more than 70 years. Besides its outstanding heritage value, it thus also represents an interesting object for studying the composition of corrosion layers formed on mild steel surfaces when exposed to continental and industrial mining atmospheres. To find a suitable transparent corrosion prevention coating, various on-site coating samples were evaluated after 11 months of outdoor exposure, including Owatrol Oil®, which is based on natural oil and alkyd resin with strong wicking potential. The substance is frequently applied for the conservation of single components but is not yet widely used on large steel structures in the field of industrial heritage conservation. However, it represented the most stable anti-corrosion coating under the local atmospheric conditions in the on-site tests. Thus, the suitability of Owatrol Oil® as a transparent coating for corrosion protection of riveted mild steel structures in such climates was further investigated as a more recent approach for the conservation of large steel structures. Since the protective coatings are exposed to strong UV radiation in the local climate, the addition of a specific UV stabilizer mixture was also tested. For such laboratory tests, two mild steel samples were taken. The first one originated from a diagonal strut of the 1920s and the second one from a handrail mounted in the early 1960s. Using corresponding high-resolution scanning electron microscopy (HR-SEM) and energy-dispersive X-ray spectroscopy (EDX) it was found that the corrosion layers are predominantly composed of lepidocrocite and goethite. A weathering program simulating the specific environmental conditions at Tsumeb in a UV climate chamber was developed and the corrosion resistance of the mild steel surface was subsequently evaluated by potentiodynamic measurements. Such tests proved to be a fast and reliable procedure for ranking the corrosion resistance of the old mild steels. It was found that the long-term corrosion layers already provide significant protection against further corrosion in the simulated environment. However, the study also showed that this can be further improved by the application of the Owatrol Oil® as a protective coating that also seals crevices. The addition of the UV stabilizers, however, led to a significant deterioration in corrosion protection, even in comparison to that of the uncoated long-term corrosion layers on the surface. Regular overcoating seems more advisable for the long-term preservation of the Shaft #1 headgear than modifying the Owatrol Oil® coating with the tested UV-stabilizing additives. Conservation of Tortoise Shell Using Hydroxyapatite / Collagen as a Consolidation Material in Studies in conservation, Vol.68 N°3-4(2023; April-May) (2023-04-03)
[article]
Titre : Conservation of Tortoise Shell Using Hydroxyapatite / Collagen as a Consolidation Material Type de document : texte imprimé Année de publication : 2023 Article en page(s) : Pages 318-325 Langues : Anglais (eng) Catégories : Hydroxyapatite
Microscopie électronique à balayage
Reliques -- Chine -- Antiquité -- Conservation et restauration
Tortues -- Chine -- AntiquitéMots-clés : HAp/collagène Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
The ability of hydroxyapatite (HAp)/collagen to consolidate tortoise shell relics was assessed. The chromatic parameters and hardness index of simulated weathered tortoise shells were measured before and after treatment to assess the effect of the application of HAp/collagen material. The HAp particles formed stable colloids under the proper conditions, and their average size was approximately 35 nm. SEM images showed that the HAp/collagen material was effective at filling and bonding the openings of the weathered tortoise shell. Compared with the control materials HAp and DAP/Ca(OH)2, HAp/collagen exhibited the best ability to consolidate simulated weathered tortoise shells. These results suggest a promising new and compatible method for the preservation of tortoise shell relics.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 318-325[article] Conservation of Tortoise Shell Using Hydroxyapatite / Collagen as a Consolidation Material [texte imprimé] . - 2023 . - Pages 318-325.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 318-325
Catégories : Hydroxyapatite
Microscopie électronique à balayage
Reliques -- Chine -- Antiquité -- Conservation et restauration
Tortues -- Chine -- AntiquitéMots-clés : HAp/collagène Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
The ability of hydroxyapatite (HAp)/collagen to consolidate tortoise shell relics was assessed. The chromatic parameters and hardness index of simulated weathered tortoise shells were measured before and after treatment to assess the effect of the application of HAp/collagen material. The HAp particles formed stable colloids under the proper conditions, and their average size was approximately 35 nm. SEM images showed that the HAp/collagen material was effective at filling and bonding the openings of the weathered tortoise shell. Compared with the control materials HAp and DAP/Ca(OH)2, HAp/collagen exhibited the best ability to consolidate simulated weathered tortoise shells. These results suggest a promising new and compatible method for the preservation of tortoise shell relics.Conservation of wall paintings : volume 1 / Paolo Mora
Titre : Conservation of wall paintings : volume 1 Type de document : texte imprimé Auteurs : Paolo Mora, Auteur ; Laura Mora, Auteur ; Paul Philippot, Auteur Editeur : Sevenoaks : Butterworths Importance : 215 p. ISBN/ISSN/EAN : 978-0-408-10812-6 Langues : Anglais (eng) Catégories : Peinture et décoration murales -- Conservation et restauration
Peinture et décoration murales -- HistoireIndex. décimale : 7.025 Dommages. Conservation. Protection Conservation of wall paintings : volume 1 [texte imprimé] / Paolo Mora, Auteur ; Laura Mora, Auteur ; Paul Philippot, Auteur . - Sevenoaks : Butterworths, [s.d.] . - 215 p.
ISBN : 978-0-408-10812-6
Langues : Anglais (eng)
Catégories : Peinture et décoration murales -- Conservation et restauration
Peinture et décoration murales -- HistoireIndex. décimale : 7.025 Dommages. Conservation. Protection Réservation
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Code-barres Cote Support Localisation Section Disponibilité SL 20607 7.025 MOR Livre ESA Saint-Luc Beaux-Arts - Biblio Disponible Conservation of wall paintings : volume 2 / Paolo Mora
Titre : Conservation of wall paintings : volume 2 Type de document : texte imprimé Auteurs : Paolo Mora, Auteur ; Laura Mora, Auteur ; Paul Philippot, Auteur Editeur : Sevenoaks : Butterworths Importance : 494 p. ISBN/ISSN/EAN : 978-0-408-10812-6 Langues : Anglais (eng) Catégories : Peinture et décoration murales -- Conservation et restauration Index. décimale : 7.025 Dommages. Conservation. Protection Conservation of wall paintings : volume 2 [texte imprimé] / Paolo Mora, Auteur ; Laura Mora, Auteur ; Paul Philippot, Auteur . - Sevenoaks : Butterworths, [s.d.] . - 494 p.
ISBN : 978-0-408-10812-6
Langues : Anglais (eng)
Catégories : Peinture et décoration murales -- Conservation et restauration Index. décimale : 7.025 Dommages. Conservation. Protection Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité SL 20608 7.025 MOR Livre ESA Saint-Luc Beaux-Arts - Biblio Disponible Conservation des peintures en Chine et au Japon : différences techniques et culturelles / Claire Illouz in Conservation restauration des biens culturels, no.12(1998:déc.) (1998-12-01)
PermalinkLa conservation des peintures modernes et contemporaines / Alain Roche
PermalinkPermalinkLa conservation des photographies, d'inévitables compromis / Jérôme Monnier in Conservation restauration des biens culturels, no.9(1997:mai) (1997-05-01)
PermalinkLa conservation de la plume / Denis Guillemard in Conservation restauration des biens culturels, no.5(1993:oct.) (1993-10-01)
PermalinkConservation préventive : la cathédrale de Chartres comme laboratoire / Élisabeth Evangelisti in Conservation restauration des biens culturels, no.16(2000:déc.) (2000-12-01)
PermalinkLa conservation préventive des céramiques archéologiques remontées dans les réserves du Préhistosite de Ramioul / Charlotte Martin
PermalinkLa conservation préventive dans un cabinet graphique / Claude Laroque in Conservation restauration des biens culturels, no.2(1990:déc.) (1990-12-01)
PermalinkLa conservation préventive dans les musées modestes. Cas pratique : Le musée de la ville de Herstal / Cyrielle Colonval
PermalinkConservation préventive des vestiges métalliques : une approche comparatives des boites de stockage hermétiques / Jacques Rebière in Conservation restauration des biens culturels, no.3(1991:déc.) (1991-12-01)
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