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Characterization of Oxides from Al–Mg–Zn Alloys with Heat Treatment, with Scanning Electron Microscopy and Fluorescence Microscopy

  • Aline HernándezEmail author
  • Bernardo Campillo
  • Sergio Serna
  • Álvaro Torres
  • Natalia Loera
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Al–Mg–Zn alloys have some electrochemical properties that benefit their use to be considered as sacrificial anodes. However, its efficiencies are inadequate to the commercial values so it is necessary to apply heat treatments to them. This paper evaluates the electrochemical properties of two experimental alloys: 9.4 Mg–7.4 Zn–Al and 7.9 Mg–13.3 Zn–Al, it also characterizes the corrosion products obtained from them using SEM and FM in order to evaluate their possible impact to the environment and their use as sacrificial anodes. The heat treatment lasting between 5 and 24 h presented the best corrosion velocities and current drainage capacity, showing in both cases localized corrosion in phases τ-Al2Mg3Zn3 and Mg2Si.

Keywords

Oxides Anodes Alloys Fluorescence SEM 

References

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    Orozco R, Genesca J, Juárez-Islas J (2007) Effect of Mg content on the performance of Al-Zn-Mg sacrificial anodes. J Mater Eng Perform 16(2):229CrossRefGoogle Scholar
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    González C, Álvarez O, Genesca J, Juárez-Islas JA (2003) Solidification of Chill-Cast Al-Zn-Mg alloys to be used as sacrificial anodes. Metall Mater Trans A 34A:2991CrossRefGoogle Scholar
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    Francia SR (2004) Protección Catódica-Diseño de Ánodos de Sacrificio. Revista del Instituto de Investigación FIGMMG 7(13):37–39Google Scholar
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    ASTM International, Standard (2002) Test method for laboratory evaluation of magnesium sacrificial anode test specimens for underground applications, G97-97 (Reapproved 03(02):398–401Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Aline Hernández
    • 1
    Email author
  • Bernardo Campillo
    • 2
  • Sergio Serna
    • 3
  • Álvaro Torres
    • 4
  • Natalia Loera
    • 1
  1. 1.Facultad de IngenieríaUniversidad Anáhuac MéxicoNaucalpanMexico
  2. 2.Facultad de QuímicaUNAMMexico CityMexico
  3. 3.Centro de Investigación en Ingeniería y Ciencias AplicadasUniversidad Autónoma del Estado de MorelosMorelosMexico
  4. 4.CENIDETCuernavacaMexico

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