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Electrochemical behavior of alloy AgCu50 during oxidation in the presence of chlorides and benzotriazole

  • Mirjana Rajčić-Vujasinović , Vesna Grekulović , Uroš Stamenković and Zoran Stević
Published/Copyright: June 19, 2017
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Materials Testing
From the journal Materials Testing Volume 59 Issue 6

Abstract

The presence of chloride ions in concentrations higher than 0.01 mol × dm−3 significantly intensifies anodic processes at AgCu50 alloy. In order to slow down this reaction, it was looked for the possibility of using benzotriazole known as an effective corrosion inhibitor for copper. This paper shows the influence of benzotriazole in a wide range of concentrations on inhibition of anodic processes as well as its influence on mechanism of the reactions such as formation of copper and silver oxides and chlorides. To determine this influence, open circuit potential measurements, anodic polarization and potentiostatic oxidation followed by optical microscopy were used. It was discovered that benzotriazole in concentrations higher than 0.005 mol × dm−3 almost completely passivates the mentioned alloy in alkaline solutions in the presence of chloride ions in a concentration range from 0.01 to 0.02 mol × dm−3.

Kurzfassung

Die Anwesenheit von Chloridionen in Konzentrationen über 0,01 mol × dm−3 intesiviert signifikant die anodischen Prozesse der Legierung AgCu50. Es wurde nach einer Möglichkeit gesucht, um diese Reaktionen zu verlangsamen. Dazu wurde Benzotriazol verwendet, das als effektiver Korrosionsinihibitor für Kupfer bekannt ist. Der vorliegende Beitrag zeigt den Einfluss von Benzotriazol über einen breiteren Konzentrationsbereich auf die Inhibierung von anodischen Prozesses sowie seinen Einfluss auf den Reaktionsmechanismus, wie die Bildung von Kupfer- und Silberoxiden sowie Chloriden. Um diesen Einfluss zu bestimmen, wurden freie Korrosionspotentialmessungen, anodische Polarisierungen und potentiostatische Oxidation, gefolgt von lichtmikroskopische Untersuchungen durchgeführt. Es stellte sich heraus, dass Benzotriazol in Konzentrationen über 0,005 mol × dm−3 die besagte Legierung in alkalischen Lösungen nahezu vollständig passiviert, und zwar unter Anwesenheit von Chloridionen im Konzentrationsbereich zwischen 0,01 und 0,02 mol × dm−3.

*Correspondence Address, Prof. Dr. Mirjana Rajčić-Vujasinović, Department of Metallurgy, Technical Faculty in Bor, University of Belgrade, V.J. 12, Bor, Serbia, E-mail:

Prof. Dr. Mirjana Rajčić-Vujasinović, born 1951, is Full Professor in the Department of Metallurgical Engineering, Technical Faculty in Bor of the University of Belgrade, Serbia. Her main fields of interest are hydrometallurgy, electrometallurgy, thermodynamics and kinetics of metallurgical processes as well as materials characterization, electrochemistry, corrosion, metal and composite platings and extractive metallurgy.

Dr. Vesna Grekulović, born 1974, is Assistant Professor in the Department of Metallurgical Engineering, Technical Faculty in Bor of the University of Belgrade, Serbia. Her main fields of interest are electrochemical investigations of materials and alloys, electrometallurgical processes, operations in metallurgy and inorganic chemical technology.

MSc. Uroš Stamenković, born 1989, is a teaching assistant in the Department of Process Metallurgy and Metallic Materials, Technical Faculty in Bor, University of Belgrade, Serbia. His research interests are heat treatment and processing of metallic materials, their characterization using machines for tensile testing, hardness testing, measuring thermal and electrical conductivity of materials, as well as characterization of the materials by optical microscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy and electrochemical characterization.

Prof. Dr. Zoran Stević, born 1958, is Full Professor in the Department of Informatics, Technical Faculty in Bor of the University of Belgrade, Serbia. He received his PhD in Electrical Engineering from University of Belgrade School of Electrical Engineering, Serbia in 2004. His main fields of interest are electrotechnics, computer measurements and control, electrochemical instrumentation and IR thermography.

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Published Online: 2017-06-19
Published in Print: 2017-06-01

© 2017, Carl Hanser Verlag, München

Articles in the same Issue

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. The principles of measurement and testing to characterize material properties
  5. Electrochemical behavior of alloy AgCu50 during oxidation in the presence of chlorides and benzotriazole
  6. Mechanical property effects of symmetrical hour glass shapes formed during double-sided TIG keyhole arc welding of AISI1040 joints
  7. Residual stress state in pipe cut ring specimens for fracture toughness testing
  8. Effect of overlap length and scarf angle on the mechanical properties of different adhesive joints subjected to tensile loads
  9. Effect of post-weld heat treatment on fusion boundary microstructure in dissimilar metal welds for subsea service
  10. Effects of abaca fiber reinforcement on the dynamic mechanical behavior of vinyl ester composites
  11. Experimental and theoretical study of the rubbing process of epoxy composites against steel
  12. Structural self-organization of titanium alloys under impulse force action
  13. Effect of SiC particle size on the mechanical properties of closed aluminum foams
  14. Comparison of different bushing applications in composite structures of the aerospace industry
  15. Performance monitoring of superlarge-diameter rock-socketed piles by optic fiber sensors
  16. Free vibration of a Timoshenko beam carrying three dimensional tip mass: Analytical solution and experimental modal testing
  17. Electrochemical properties of LaNi4.2Co0.4Zn0.1Al0.3 and LaNi4.3Co0.4Zn0.1Al0.2 alloys as anode materials for Ni-MH batteries
  18. Production of hard hydrophilic Ni-B coatings on hydrophobic Ni-Ti and Ti-6Al-4V alloys by electroless deposition
https://doi.org/10.3139/120.111040

Articles in the same Issue

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. The principles of measurement and testing to characterize material properties
  5. Electrochemical behavior of alloy AgCu50 during oxidation in the presence of chlorides and benzotriazole
  6. Mechanical property effects of symmetrical hour glass shapes formed during double-sided TIG keyhole arc welding of AISI1040 joints
  7. Residual stress state in pipe cut ring specimens for fracture toughness testing
  8. Effect of overlap length and scarf angle on the mechanical properties of different adhesive joints subjected to tensile loads
  9. Effect of post-weld heat treatment on fusion boundary microstructure in dissimilar metal welds for subsea service
  10. Effects of abaca fiber reinforcement on the dynamic mechanical behavior of vinyl ester composites
  11. Experimental and theoretical study of the rubbing process of epoxy composites against steel
  12. Structural self-organization of titanium alloys under impulse force action
  13. Effect of SiC particle size on the mechanical properties of closed aluminum foams
  14. Comparison of different bushing applications in composite structures of the aerospace industry
  15. Performance monitoring of superlarge-diameter rock-socketed piles by optic fiber sensors
  16. Free vibration of a Timoshenko beam carrying three dimensional tip mass: Analytical solution and experimental modal testing
  17. Electrochemical properties of LaNi4.2Co0.4Zn0.1Al0.3 and LaNi4.3Co0.4Zn0.1Al0.2 alloys as anode materials for Ni-MH batteries
  18. Production of hard hydrophilic Ni-B coatings on hydrophobic Ni-Ti and Ti-6Al-4V alloys by electroless deposition
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