Multiscale Study of Interactions Between Corrosion Products Layer Formed on Heritage Cu Objects and Organic Protection Treatments

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ID: 253838
2019
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Abstract
In the framework of the protection of copper objects exposed to atmospheric corrosion, different solutions are envisaged, among them carboxylate treatments (HC10). In this study, an analytical approach based on complementary techniques from micrometer to nanometer scale (μRS, SEM-EDS, SAM) is used to describe the properties of the corrosion products layer (CPL) and determine the penetration depth of the HC10 protection treatment inside the CPL of copper samples issued from the roof of the Saint Martin church in Metz. The CPL consists in a thick brochantite layer (20 to 50 μm), mainly composed of Cu4SO4(OH)6, on top of a thinner (1 to 5 μm thick) cuprite layer, Cu2O, acting as a natural corrosion barrier on the metal. Application of the organic treatment is implemented by immersing the corroded samples in HC10 solution, consistent with future requirements for large scale applications. Even for short-term duration (one minute), the HC10 treatment penetrates to the cuprite/brochantite interface, but Cu(C10)2 precipitate is only detected locally, whereas for a longer immersion of thirty minutes, it is present in higher proportions in the whole brochantite layer, filling the pores, up to the cuprite/brochantite interface. Cu(C10)2 acts as a second inner barrier and prevents liquid infiltration.
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lhronde2019multiscaleheritage Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors L’héronde, Maëva;Bouttemy, Muriel;Mercier-Bion, Florence;Neff, Delphine;Apchain, Emilande;Etcheberry, Arnaud;Dillmann, Philippe;
Journal Heritage
Year 2019
DOI
DOI not found
URL
https://www.mdpi.com/2571-9408/2/3/162
Keywords
Microbiology Biology (General) Archaeology Computer applications to medicine. Medical informatics plant ecology plant culture history of education

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