Electrochemical behaviour of a Pb–Sb alloy in 0.5M NaCl and 0.5M H2SO4 solutions

Autor:	Wislei R. Osório, Amauri Garcia, Daniel M. Rosa
Rok vydání:	2012
Předmět:	Materials science Unidirectional solidification Metallurgy Alloy engineering Analytical chemistry Potentiodynamic polarization Electrolyte engineering.material Electrochemistry Current density Corrosion Dielectric spectroscopy
Zdroj:	Materials & Design. 34:660-665
ISSN:	0261-3069
DOI:	10.1016/j.matdes.2011.05.023
Popis:	A comparative experimental study on the electrochemical behaviour of a Pb–1 wt.%Sb alloy is carried out in a 0.5 M NaCl and a 0.5 M H 2 SO 4 solutions at room temperature. A water-cooled unidirectional solidification system was used to obtain the Pb–Sb alloy samples used in the corrosion tests. Electrochemical impedance spectroscopy (EIS) plots, potentiodynamic polarization curves and an equivalent circuit analysis were used to evaluate the electrochemical behaviour. The experimental current density decreased with the increase in the cellular spacing, independently of the nature of the applied electrolyte. Hence, a dilute Pb–Sb alloy having coarse cell spacings has higher electrochemical corrosion resistance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8480b50da76819e23bdc8f49f50eef6e https://doi.org/10.1016/j.matdes.2011.05.023 Zobrazit plný text záznamu Full Text from ScienceDirect