RT Journal Article
T1 Protective Coatings for Metals in Scientific—Technical Heritage: The Collection of the Spanish National Museum of Science and Technology (MUNCYT)
A1 Molina, María Teresa
A1 Cano, Emilio
A1 Leal, Joaquina
A1 Fort González, Rafael
A1 Álvarez de Buergo, Mónica
A1 Ramírez-Barat, Blanca
AB This paper presents results on the protective properties of different coatings over metals representative of those found in scientific–technical heritage collections. An examination of several objects in the collection of the Spanish National Museum of Science and Technology have allowed the identification of brass and steel as the most representative metals, and the existence of coatings (mainly shellac and acrylic resins) applied for aesthetic and/or conservation purposes. Based on these findings, brass and steel coupons coated with Paraloid B-44, B-48, B-67, B-72, Incralac, Cosmolloid H80, B-72 + H80 double layer and shellac have been studied to carry out a first screening in order to select the most promising candidates and determine the most appropriate methodology and key factors for the study. Coatings have been aged up to 336 h using cycles of UV light and water condensation. The change in the aspect of the coupons has been assessed via visual examination, optical microscopy and colorimetric measurements, with B-44 and Incralac showing the least change. EIS has been used for a quantitative evaluation of the protective properties and FTIR to measure chemical changes experienced by some coatings, such as B-48 and B-67. These evaluations allowed us to follow, understand and compare the behaviour of the different coatings and substrates after artificial ageing.
PB MDPI
SN 2571-9408
YR 2023
FD 2023
LK https://hdl.handle.net/20.500.14352/72139
UL https://hdl.handle.net/20.500.14352/72139
LA eng
NO Ministerio de Ciencia e Innovación
NO ERDF A way of making Europe”
NO Comunidad de Madrid
NO European Social Fund
DS Docta Complutense
RD 12 abr 2025