USMF logo

Institutional Repository in Medical Sciences
of Nicolae Testemitanu State University of Medicine and Pharmacy
of the Republic of Moldova
(IRMS – Nicolae Testemitanu SUMPh)

Biblioteca Stiintifica Medicala
DSpace

University homepage  |  Library homepage

 
 
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12710/22456
Full metadata record
DC FieldValueLanguage
dc.contributor.authorMîrzac, Viorica-
dc.date.accessioned2022-11-13T13:30:47Z-
dc.date.available2022-11-13T13:30:47Z-
dc.date.issued2022-
dc.identifier.citationMÎRZAC, Viorica. Effect of oxygen on copper corrosion: [poster]. In: Conferinţa ştiinţifică anuală "Cercetarea în biomedicină și sănătate: calitate, excelență și performanță", 19-21 octombrie 2022: culegere de postere electronice. 2022, p. 215.en_US
dc.identifier.urihttps://conferinta.usmf.md/wp-content/uploads/culegere_de_postere_2022.pdf-
dc.identifier.urihttp://repository.usmf.md/handle/20.500.12710/22456-
dc.description.abstractIntroduction. Knowledge of the corrosive properties of surfaces is important in the context of selecting materials according to their characteristics. Changing the parameters of the metal over time or characterizing the corrosion result allows the determination of the corrosion rate and corrosive properties. Purpose. Studying the effect of oxygen on the corrosion of copper in corrosive electrolytes. Material and methods The open circuit potential (OCP) of the 2.5 cm2 copper sample is measured vs. Ag/AgCl, at room temperature, with PARSTAT 2273 potentiostat (Princeton Applied Research), in the pyrophosphate electrolyte (g L-1: CuSO4-5H2O - 12,5; Na4P2O7-5H2O - 100; pH = 8) and 0.5M Na2SO4 solution as a corrosive medium. The corrosion process of Cu coatings was investigated by EIS (electrochemical impedance spectroscopy). EIS was measured at OCP potential with a frequency range of 10-3-104 Hz in pyrophosphate and 0.5 M Na2SO4 solution, using an amplitude of 10 mV. The test data was fitted by ZView2 software. Results. The obtained data has shown copper OCP decrease in the pyrophosphate electrolyte from -0.209 V (in the absence of argon) to -0.218 V in the presence of argon (30 minutes prior to and during the measurement). In the 0.5M sodium sulphate solution, the copper OCP has dropped to negative values in the presence of argon -0.027 V compared to -0.006 V. Thus, inert argon led to inhibition of the corrosion process. The variation of copper OCP in the 0.5M sodium sulphate solution was more pronounced (0.021 V) than in the pyrophosphate electrolyte (0.009 V). The corrosion resistance of copper coatings in pyrophosphate solution in the presence of argon is 5701.39 Ohm higher than in its absence. The corrosion resistance of the copper coatings in 0.5 M Na2SO4 solution in the presence of argon is 3242.68 Ohm higher than in its absence. The increase of the resistance reduces the corrosion rate in the presence of inert argon. Conclusions. Decreasing the concentration of oxygen in the system decreases the rate of the reduction process of dissolved oxygen. Therefore, the OCP moves to cathodic values and the corrosion rate of copper decreases. The increase of the corrosion resistance in the absence of oxygen leads to a decrease in the corrosion rate.en_US
dc.language.isoenen_US
dc.publisherUniversitatea de Stat de Medicină şi Farmacie "Nicolae Testemiţanu" din Republica Moldovaen_US
dc.relation.ispartofConferinţa ştiinţifică anuală "Cercetarea în biomedicină și sănătate: calitate, excelență și performanță", 2022en_US
dc.subjectcopper corrosionen_US
dc.subjectcorrosion inhibitionen_US
dc.titleEffect of oxygen on copper corrosionen_US
dc.typeOtheren_US
Appears in Collections:Conferinţa ştiinţifică anuală "Cercetarea în biomedicină și sănătate: calitate, excelență și performanță", 19-21 octombrie, 2022: Culegere de postere

Files in This Item:
File Description SizeFormat 
Effect_of_oxygen_on_copper_corrosion.pdf368.38 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2013  Duraspace - Feedback