Revista de Ingeniería

revinge | eISSN 2011-0049 | ISSN 0121-4993

Estimate of Intergranular Corrosion on AZ31B Magnesium alloy Welded by Friction STIR

No. 39 (2013-07-01)
  • Willian Aperador Chaparro
    1 Doctor en Ingeniería, Ingeniería Mecatrónica, Universidad Militar Nueva Granada, Bogotá Colombia, william.aperador@unimilitar.edu.co
  • Geovanny Rodríguez Zamora
    2 Ingeniero en Materiales, Ingeniería en Materiales, Universidad del Valle, Cali, Colombia, geo-rodri@hotmail.com
  • Fernando Franco Arenas
    3 Doctor en Ingeniería, Ingeniería en Materiales, Universidad del Valle, Cali, Colombia, fdo_franco@yahoo.com
https://doi.org/10.16924/revinge.39.6

Abstract

In this work, we evaluated and compared the intergranular corrosion on AZ31B magnesium alloy welded by friction stir processes with tungsten arc and gas welding. The electrochemical impedance spectroscopy technique was used to evaluate and compare the corrosion behavior of both weldings. In addition, microstructural analysis of the grain boundaries was performed by microscopy. The results of this study show an increased corrosion resistance of the specimens obtained by the friction stir process.

Keywords: AZ31B magnesium alloy, friction stir welding, intergranular corrosion