RT info:eu-repo/semantics/article
T1 Lanthanum-silica sol-gel coatings for protecting metallic materials in museums: approaches to copper, bronze, lead and steel
A1 Peña Poza, Javier
A1 Agua Martínez, Fernando
A1 Gil Puente, María Cristina
A1 Villegas Broncano, María Ängeles
A1 García Heras, Manuel
K1 Metals
K1 Coatings
K1 2303.18 Metales
K1 5101.06 Museología
AB Museum objects made from metals face the challenge of delaying corrosion in exhibition rooms, showcases and holdings. This study examined some innovative solutions used to protect such items based on sol-gel coatings doped with lanthanum. These coatings were prepared from sols based on TEOS as a precursor. Lanthanum acetate/nitrate was added as a doping agent and corrosion inhibitor. The coatings were deposited upon slabs of copper, bronze, lead and steel, since they are among the most common metals present in museums items. The coatings application was accomplished by immersion-extraction, and the remaining sols were gelled and characterized by Fourier transformed infrared spectroscopy and differential thermal analysis and thermogravimetry. To evaluate the behaviour and resistance of the coatings, tests of accelerated aging were carried out in climatic and Kesternich chambers, as well as under an atmosphere saturated with organic acids and under UV irradiation. The simulated conditions tested were undertaken to approach real conditions inside a conventional museum showcase. The microstructure of the coatings before and after accelerated aging tests was observed through optical and field emission scanning electron microscopies. The results indicated that these coatings can be a useful preventive, conservation avenue to protect copper, bronze and lead items exhibited in museums.
PB MDPI
SN 2079-6412
YR 2018
FD 2018
LK https://uvadoc.uva.es/handle/10324/53346
UL https://uvadoc.uva.es/handle/10324/53346
LA eng
NO Coatings, 2018, vol. 8, n. 4, 15 p.
NO Producción Científica
DS UVaDOC
RD 27-dic-2024