Title
Koroziono ponašanje bakra u sulfatnoj sredini u prisustvu organiskih inhibitora
Creator
Petrović, Marija B. 1982-
Copyright date
2012
Object Links
Select license
Autorstvo-Nekomercijalno 3.0 Srbija (CC BY-NC 3.0)
License description
Dozvoljavate umnožavanje, distribuciju i javno saopštavanje dela, i prerade, ako se navede ime autora na način odredjen od strane autora ili davaoca licence. Ova licenca ne dozvoljava komercijalnu upotrebu dela. Osnovni opis Licence: http://creativecommons.org/licenses/by-nc/3.0/rs/deed.sr_LATN Sadržaj ugovora u celini: http://creativecommons.org/licenses/by-nc/3.0/rs/legalcode.sr-Latn
Language
Serbian
Cobiss-ID
Theses Type
Doktorska disertacija
description
Datum odbrane:
Other responsibilities
mentor
Antonijević, Milan, 1955-
član komisije
Milić, Snežana
član komisije
Pavlović, Miomir
University
Univerzitet u Beogradu
Faculty
Tehnički fakultet u Boru
Alternative title
Corrosion behaviour of copper in sulphate media in the presence of organic inhibitors
Publisher
[M. Petrović]
Format
VII, 141 list
description
Tehnološko inženjerstvo - Hemija, hemijska tehnologija i hemijsko inženjerstvo / Technological engineering - Chemistry, chemical technology and chemical engineering
Abstract (sr)
Koroziono ponašanje bakra u ovom radu ispitivano je u alkalnoj sulfatnoj sredini
u prisustvu potencijalnih inhibitora korozije: purina, cisteina, 2-aminotiazola i 2-amino-
5-etil-1,3,4-tiadiazola. Uticaj purina i cisteina na ponašanje bakra ispitivan je i u
neutralnoj sulfatnoj sredini.
Rezultati elektrohemijskih ispitivanja pokazali su da sva ispitivana jedinjenja
dovode do smanjenja gustine struje što ukazuje na njihovo inhibitorsko dejstvo...
Abstract (en)
The corrosion behaviour of copper in alkaline sulphate media in the presence of
potential corrosion inhibitors: purine, cysteine, 2-aminothiazole and 2-amino-5-ethyl-
1,3,4-thiadiazole was investigated in this study. The effect of purine and cysteine on
copper behaviour in neutral sulphate media was studied as well.
The results of electrochemical tests have shown that all investigated compounds
reduce current density, which indicates their inhibitory characteristics. The inhibition
efficiency increases as inhibitor concentration increases, reaching values between 80
#$@% KH%L% #'% #$% !$-!D!'(3% C($C*$'3#'!($% (0% FGFH-2 mol dm-3. The concentration effect
becomes especially pronounced as the potential to which the electrode is exposed during
chronoamperometric measurements gets higher.
The open circuit potential and the corrosion potential are shifted toward more
negative values indicating the dominant effect of the inhibitor on the cathode process;
however, the shift is not significant, so the inhibitor acts as a mixed type. The exception
is observed when cysteine is introduced into alkaline solutions, which results in a
significant potential shift toward more negative values. Consequently, it can be said that
cysteine has a dominant effect on the cathode process under the said conditions.
The inhibitory effect of organic compounds occurs as a result of their interaction
with copper surface, including the adsorption of the inhibitor molecules on the surface
of copper or the formation of a complex with copper. The adsorption of all the
inhibitors studied in this research proceeds according to the Langmuir adsorption
isotherm. Based on the established adsorption model, it is possible to calculate the
Gibbs free energy of adsorption. The values range from -30 to -40 kJ mol-1, pointing to
a spontaneous adsorption that can be characterized as a strong physical adsorption with
slight chemisorption.
Authors Key words
bakar, korozija, polarizacija, sulfatna sredina, inhibitori, purin, cistein, 2-
aminotiazol, 2-amino-5-etil-1,3,4-tiadiazol
Authors Key words
copper, corrosion, polarization, sulphate media, inhibitors, purine, cysteine,
2-aminothiazole, 2-amino-5-ethyl-1,3,4-thiadiazole
Classification
620.193.4:669.3(043.3)
Type
Tekst
Abstract (sr)
Koroziono ponašanje bakra u ovom radu ispitivano je u alkalnoj sulfatnoj sredini
u prisustvu potencijalnih inhibitora korozije: purina, cisteina, 2-aminotiazola i 2-amino-
5-etil-1,3,4-tiadiazola. Uticaj purina i cisteina na ponašanje bakra ispitivan je i u
neutralnoj sulfatnoj sredini.
Rezultati elektrohemijskih ispitivanja pokazali su da sva ispitivana jedinjenja
dovode do smanjenja gustine struje što ukazuje na njihovo inhibitorsko dejstvo...
“Data exchange” service offers individual users metadata transfer in several different formats. Citation formats are offered for transfers in texts as for the transfer into internet pages. Citation formats include permanent links that guarantee access to cited sources. For use are commonly structured metadata schemes : Dublin Core xml and ETUB-MS xml, local adaptation of international ETD-MS scheme intended for use in academic documents.