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
Document type
Article
Creators
CreatorsAffiliationORCID
Sassoni, EnricoUniversity of Bologna, Italy0000-0003-0716-510X
Graziani, GabrielaUniversity of Bologna, Italy
Franzoni, ElisaUniversity of Bologna, Italy
Scherer, George W.Princeton University
Keywords
Stonework Acid solutions SEM Atmospheric corrosion Acid inhibition Passive films
Subjects
ISSN
0010-938X
DOI
Deposit date
25 May 2018 09:36
Last modified
23 May 2019 09:14
Project name
HAP4MARBLE - Multi-functionalization of hydroxyapatite for restoration and preventive conservation of marble artworks
Funding program
EC - H2020
URI

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