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2 results on '"drying oil oxidation"'

1. Multi-Analytical Assessment of Bodied Drying Oil Varnishes and Their Use as Binders in Armour Paints.

Author

Izzo, Francesca Caterina, Källbom, Arja, and Nevin, Austin

Subjects
*LINSEED oil, *CORROSION & anti-corrosives, *PRESERVATION of cultural property, *CHEMICAL reactions, *REFRACTIVE index, *BINDING mediums (Paint)
Abstract

The characteristics of commercially available refined and bodied linseed and tung oils, used as binders in the production of armour paints after historic recipes, are explored. Employed as anticorrosive paints mainly from the 1920s to 1960s, armour paints are greener alternatives that can be used for protection in industrial heritage conservation. Using a multi-analytical approach, chemical and physical properties of the fresh oils and solid films before and after accelerated ageing (ISO 16474-2:2013) were investigated to better understand which features are beneficial for the technical function of armour paints. Tests included measurements of density, the refractive index, insoluble impurities, alkaline impurities, the water content, the iodine value, the saponification value, the free fatty acid concentration, the acid value, the peroxide value and colour (Lovibond) and cold tests. The characterisation of the fresh oils using molecular analysis with FTIR and GC-MS revealed the complexity of the commercial formulations, for which additions of semi- and non-drying oils were detected. The results show that organic paint binders follow complex chemical reactions (such as oxidation and decrease of unsaturation being variable or swelling following water-immersion tests), with implications for their suitability for use in protection. [ABSTRACT FROM AUTHOR]

Published
2021
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2. Multi-Analytical Assessment of Bodied Drying Oil Varnishes and Their Use as Binders in Armour Paints

Author

Austin Nevin, Francesca Caterina Izzo, and Arja Källbom

Subjects
air-blown varnish, Archeology, Acid value, Saponification value, Materials science, anticorrosive coating, Armour, Materials Science (miscellaneous), modern linseed oil, Conservation, Iodine value, drying oil oxidation, tung oil, imbibition, bodied drying oils, Peroxide value, armour paints, ferrous heritage, stand oil, ageing, Water content, Settore CHIM/12 - Chimica dell'Ambiente e dei Beni Culturali, Degree of unsaturation, Drying oil, Pulp and paper industry, Archaeology, CC1-960
Abstract

The characteristics of commercially available refined and bodied linseed and tung oils, used as binders in the production of armour paints after historic recipes, are explored. Employed as anticorrosive paints mainly from the 1920s to 1960s, armour paints are greener alternatives that can be used for protection in industrial heritage conservation. Using a multi-analytical approach, chemical and physical properties of the fresh oils and solid films before and after accelerated ageing (ISO 16474-2:2013) were investigated to better understand which features are beneficial for the technical function of armour paints. Tests included measurements of density, the refractive index, insoluble impurities, alkaline impurities, the water content, the iodine value, the saponification value, the free fatty acid concentration, the acid value, the peroxide value and colour (Lovibond) and cold tests. The characterisation of the fresh oils using molecular analysis with FTIR and GC-MS revealed the complexity of the commercial formulations, for which additions of semi- and non-drying oils were detected. The results show that organic paint binders follow complex chemical reactions (such as oxidation and decrease of unsaturation being variable or swelling following water-immersion tests), with implications for their suitability for use in protection.

Published
2021

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