Analiza sastava patine elektrokemijskim i spektroskopskim tehnikama

undergraduate thesis

• Title (english): Analysis of patina composition by electrochemical and spectroscopic techniques
• Author: Helena Lončar
• Mentor: Helena Otmačić Ćurković (mentor)
• Committee member: Helena Otmačić Ćurković (predsjednik povjerenstva)
• Committee member: Marijana Kraljić Roković (član povjerenstva)
• Committee member: Domagoj Šatović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2022-09-15, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Cilj ovog rada bio je analizirati sastav patine uzorkovane sa sedam zagrebačkih skulptura i dvije kemijski sintetizirane umjetne patine. Za provedenu analizu korištena je elektrokemijska tehnika cikličke voltametrije mikročestica i Fourier transformacijska infracrvena spektroskopija (FTIR). Sastavne faze patine identificirane su usporedbom elektrokemijskih parametara uzoraka s elektrokemijskim parametrima referentnih spojeva: CuO, Cu2O, SnO, SnO2, CuCl, CuCl2 x 2H2O i CuSO4. Utvrđeno je da je na istoj brončanoj skulpturi, ovisno o mjestu uzorkovanja, moguće formiranje različitih korozijskih produkata tj. patina nije jednolika po svom sastavu. Zaključuje se da se ove dvije metode analize sastava međusobno nadopunjuju te da njihovo zajedničko korištenje uvelike doprinosi kvaliteti analize sastava patina brončanih skulptura i artefakata.

Abstract (english)

The aim of this study was to analyze the composition of the patina collected from seven Zagreb sculptures and two chemically synthesized artificial patinas. The electrochemical technique of cyclic voltammetry of microparticles and Fourier transform infrared spectroscopy (FTIR) were used for the analysis. The component phases of the patina were identified by comparing the electrochemical parameters of the samples with the electrochemical parameters of the reference compounds: CuO, Cu2O, SnO, SnO2, CuCl, CuCl2 x 2H2O and CuSO4. It was found that on the same bronze sculpture, depending on the place of sampling, there is a possibility of different corrosion products forming. More precisely, the patina is not uniform in its composition. It is concluded that these two methods of composition analysis complement each other and that their simultaneous application greatly contributes to the quality of analysis of the patina composition of bronze sculptures and artifacts.

• Keywords: bronca; korozija; patina; ciklička voltametrija mikročestica; ATR-FTIR
• Keywords (english): bronze; corrosion; patina; cyclic voltammetry of microparticles; ATR-FTIR
• Language: croatian
• URN:NBN: urn:nbn:hr:149:171450
• Project: Number: IP-2019-04-5030; Title: Razvoj novih rješenja za karakterizaciju i zaštitu brončane kulturne baštine izložene vanjskom okolišu; Title: Development of New Solutions for Characterization and Protection of Bronze Cultural Heritage Exposed to Outdoor Environment; Acronym: BroCH; Leader: Helena Otmačić Ćurković; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: Materials Science and Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-03-03 12:05:24