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Protection of Brass in HCl Solution by L-Cysteine and Cationic Surfactant
Joint Authors
Radovanovic, Milan B.
Tasic, Zaklina Z.
Petrovic Mihajlovic, Marija B.
Antonijevic, Milan M.
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-05-14
Country of Publication
Egypt
No. of Pages
12
Abstract EN
Electrochemical behavior of brass and inhibitory effect of L-cysteine in HCl solution are investigated using electrochemical techniques in addition to SEM-EDS analysis.
Results show that inhibition efficiency depends on inhibitor concentration and immersion time of brass electrode in inhibitor solution.
Electrochemical test results point to formation of Cu(I)-cysteine complex on the brass surface in chloride solutions with addition of different amounts of cysteine.
The formed complex has an important role in inhibition of the corrosion process in the examined media because Cu(I)-cysteine significantly reduces dissolution of brass.
Curves obtained in acidic solution in the presence of cysteine after pretreatment in sodium dodecyl sulfate (SDS) by cyclic measurements and potentiodynamic polarization measurements indicate intense inhibition of corrosion processes.
Efficient inhibition of brass dissolution is result of formation of a stable protective layer on the brass surface after pretreatment of the electrode in SDS solution.
The brass surface is modified in sodium dodecyl sulfate solution in order to increase cysteine adsorption on the electrode surface and to improve inhibition efficiency.
Inhibition mechanism of cysteine includes adsorption on active sites on the electrode surface, which is confirmed by SEM-EDS analysis of brass.
Adsorption of cysteine in hydrochloric acid solution obeys the Langmuir adsorption isotherm.
Also, Gibbs free energy of adsorption has a value of −31.5 kJ/mol and indicates strong adsorption of cysteine on the electrode surface.
American Psychological Association (APA)
Radovanovic, Milan B.& Tasic, Zaklina Z.& Petrovic Mihajlovic, Marija B.& Antonijevic, Milan M.. 2018. Protection of Brass in HCl Solution by L-Cysteine and Cationic Surfactant. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1122337
Modern Language Association (MLA)
Radovanovic, Milan B.…[et al.]. Protection of Brass in HCl Solution by L-Cysteine and Cationic Surfactant. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-12.
https://search.emarefa.net/detail/BIM-1122337
American Medical Association (AMA)
Radovanovic, Milan B.& Tasic, Zaklina Z.& Petrovic Mihajlovic, Marija B.& Antonijevic, Milan M.. Protection of Brass in HCl Solution by L-Cysteine and Cationic Surfactant. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1122337
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1122337