Pregled bibliografske jedinice broj: 261825
Protection of bronze covered with patina by innoxious organic substances
Protection of bronze covered with patina by innoxious organic substances // Electrochimica acta, 52 (2007), 27; 7770-7779 doi:10.1016/j.electacta.2007.02.024 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 261825 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Protection of bronze covered with patina by innoxious organic substances
Autori
Muresan, Liana ; Varvara, Simona ; Stupnišek-Lisac, Ema ; Otmačić, Helena ; Marušić, Katarina ; Horvat Kurbegović, Šefka ; Robbiola, Luc ; Rahmouni, Kamal ; Takenouti, Hisasi
Izvornik
Electrochimica acta (0013-4686) 52
(2007), 27;
7770-7779
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
copper-tin bronze ; imidazole ; thiadiazole ; Raman spectroscopy ; corrosion
Sažetak
Cultural bronze artefacts are exposed in indoor or outdoor environment. They often suffer of a substantial alteration due to an increasing atmospheric pollution. In this work, we propose the use of some innoxious compounds as corrosion inhibitors of bronze objects covered with patina. The bronze used was Cu-6Sn (in wt-%). This composition was selected after a preliminary work on several archaeological bronzes found in Transylvania, Romania, dated from the Late Neolithic to Roman periods. First, an artificial patina was formed on this bronze, under potential regulation, in 0.2g.L-1 NaHCO3+0.2g.L-1 Na2SO4 aqueous solution (pH 8), during four days. A pale blue to green patina was obtained and characterized using EDS and Raman spectroscopy. Then, four innoxious organic substances were examined as corrosion inhibitors: 5mM 4-methyl-1-(p-tolyl)-imidazole (TMI), 10mM 1-phenyl 4-methyl-imidazole (PMI), 1mM 2-mercapto 5-R-acetylamino 1, 3, 4-thiadiazole (MAcT), 1mM 2-mercapto 5-R-amino-1, 3, 4-thiadiazole (MAT), and for comparison 1mM benzotriazole (BTA) The impedance spectra collected showed, for all of them, three depressed capacitive loops. On the basis of these capacitance values, these loops were allocated to the surface film with ionic conduction, the double layer capacitance with the charge transfer resistance, and the oxidation – reduction process involving the surface patina. TMI and MAcT were found to be efficient inhibitors though their performances are significantly lower than that of BTA.
Izvorni jezik
Engleski
Znanstvena područja
Kemijsko inženjerstvo
POVEZANOST RADA
Projekti:
MZOS-125-1252973-2572 - Novi netoksični inhibitori korozije metala (Otmačić Ćurković, Helena, MZOS ) ( CroRIS)
Ustanove:
Fakultet kemijskog inženjerstva i tehnologije, Zagreb,
Akademija likovnih umjetnosti, Zagreb
Profili:
Helena Otmačić Ćurković
(autor)
Katarina Marušić
(autor)
Ema Lisac
(autor)
Šefka Horvat-Kurbegović
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
Uključenost u ostale bibliografske baze podataka::
- CA Search (Chemical Abstracts)