|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Coatings and Surface Engineering for Environmental Protection II
||Electrochemical Impedance Study of Brazing Cu-Ag Alloy in Deionized Water in the Presence of Benzotriazole
||Hooman Rahmani, Efstathios I Meletis
|On-Site Speaker (Planned)
Cu-60Ag is used as a brazing alloy in cooling system of data center facilities and benzotriazole (BTA) is added as a corrosion inhibitor. However, corrosion in these systems takes place leading to device failure. In this study, the effect of BTA on the corrosion behavior of Cu-60Ag was investigated by electrochemical impedance spectroscopy (EIS), polarization, and in-situ AFM. Results showed that BTA has a high coverage and inhibiting role for Cu while for Ag the efficiency is much lower. Langmuir adsorption isotherms were exploited to study the nature of adsorption. EIS tests revealed the densification of the inhibiting layer on the metal surfaces. Equivalent circuits were developed and charge transfer resistance values were compared. AFM was used to trace the inhibitor adsorption on the Cu-6Ag alloy with the Ag-rich phase segregated in the grain boundaries. The corrosion behavior of the brazing alloy is discussed in view of the experimental findings.
||Planned: Supplemental Proceedings volume