Calcium phosphate coatings for marble conservation: influence of ethanol and isopropanol addition to the precipitation medium on the coating microstructure and performance

Sassoni, Enrico ; Graziani, Gabriela ; Franzoni, Elisa ; Scherer, George W. (2018) Calcium phosphate coatings for marble conservation: influence of ethanol and isopropanol addition to the precipitation medium on the coating microstructure and performance. Corrosion Science, 136 . pp. 255-267. ISSN 0010-938X
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Abstract

The effect of adding ethanol and isopropanol to aqueous solutions of diammonium hydrogen phosphate, used to create a passivating layer of calcium phosphates over marble, was investigated. Thanks to its weakening effect on the hydration sphere of ions in solution, ethanol allowed complete coverage of marble surface by a crack-free and pore-free layer of octacalcium phosphate. Even better results were obtained using isopropanol, because it has lower adsorption affinity to calcite than ethanol. Treatments involving alcohols provided good acid protection and also restored cohesion among calcite grains in weathered marble.

Abstract
Tipologia del documento
Articolo
Autori
AutoreAffiliazioneORCID
Sassoni, EnricoUniversity of Bologna, Italy0000-0003-0716-510X
Graziani, GabrielaUniversity of Bologna, Italy
Franzoni, ElisaUniversity of Bologna, Italy
Scherer, George W.Princeton University
Parole chiave
Stonework Acid solutions SEM Atmospheric corrosion Acid inhibition Passive films
Settori scientifico-disciplinari
ISSN
0010-938X
DOI
Data di deposito
25 Mag 2018 09:36
Ultima modifica
23 Mag 2019 09:14
Nome del Progetto
HAP4MARBLE - Multi-functionalization of hydroxyapatite for restoration and preventive conservation of marble artworks
Programma di finanziamento
EC - H2020
URI

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