Influence of temperature and applied potential on the electrochemical behaviour of nickel in LiBr solutions by means of electrochemical impedance spectroscopy

Autor:	Virginia Guiñón-Pina, José García-Antón, A. Igual-Muñoz
Rok vydání:	2009
Předmět:	Passivation Lithium bromide General Chemical Engineering Inorganic chemistry chemistry.chemical_element General Chemistry Electrochemistry Corrosion Cathodic protection Dielectric spectroscopy chemistry.chemical_compound Nickel chemistry General Materials Science Polarization (electrochemistry)
Zdroj:	Corrosion Science. 51:2406-2415
ISSN:	0010-938X
DOI:	10.1016/j.corsci.2009.06.027
Popis:	The effects of temperature, applied potential and hydrogen generation on the passive behaviour of nickel were investigated in lithium bromide aqueous solution using different electrochemical techniques: open circuit potential (OCP), potentiodynamic and potentiostatic measurements, and electrochemical impedance spectroscopy (EIS). From the polarization curves, it is observed that localised corrosion resistance decreases with temperature, the repassivation of nickel is more difficult at 75 °C and the hydrogen evolution reaction is favoured with an increase in temperature. Impedance results showed that the most suitable corrosion mechanism of nickel in LiBr solutions includes the double layer and the passive film formed on the nickel surface. The passive film of nickel partially disappears when a low cathodic potential is applied.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e5e6b995377a468f732ec448aefe77c9 https://doi.org/10.1016/j.corsci.2009.06.027 Zobrazit plný text záznamu Full Text from ScienceDirect