Efficiency and durability of protective treatments on cultural heritage copper corrosion layers. (1st May 2021)

• Record Type: Journal Article
• Authors: Apchain, Emilande; Neff, Delphine; Gallien, Jean-Paul; Nuns, Nicolas; Berger, Pascal; Noumowé, Albert; Dillmann, Philippe
• Is Part Of: Corrosion science. Volume 183(2021)
• Publication Date: 2021-05-01
• Subjects: Copper -- Copper alloys -- Atmospheric corrosion -- Protective treatments -- Microcrystalline wax -- Decanoate solution; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2021.109319
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Cosmolloïd wax and HC10 were tested on century-old copper corrosion products. Penetration was studied on transverse section by Raman and NRA on doped compounds. The penetration of the treatments in CP depends strongly on the application mode. Water penetration after treatment was tested by D2 O labeling. Durability under water leaching depends on the penetration of the treatments in the CPs. Abstract: To protect copper artefacts of the cultural heritage from atmospheric degradation protective treatment must be applied. Two types of protective treatments: microcrystalline wax (Cosmolloïd wax) and decanoate solution (HC10 ) were tested. Two aspects were considered: the penetration of the treatments in the corrosion layers, and its durability. Equivalent efficiencies for both treatments were demonstrated. The penetration of the treatments seems to depend essentially on its application mode. Re-corrosion experiments of treated samples under immersion in D2 O demonstrate that the efficiency and the durability with time or after water leaching depend on the penetration of the treatments in the corrosion layers.