Work

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

Year: 2018

Type: article

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.

Source: Corrosion Science

DOI: 10.1016/j.corsci.2018.03.019

Authors: Enrico Sassoni, Gabriela Graziani, Elisa Franzoni, George W. Scherer

Institutions: University of Bologna, Princeton University

Language: English

Topic: Building materials and conservation

Subfield: Earth-Surface Processes

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,070

Funders: National Science Foundation, Princeton Center for Complex Materials, European Commission