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Effect of Experimental Aging on the Performance of Al-7.9Mg-13.3Zn and Al-10.5Mg-8.6Zn Alloys as Sacrificial Anodes

1
Facultad de Química-UNAM, Circuito de la Investigación Científica S/N, Mexico City 04510, Mexico
2
Facultad de Ingeniería, Universidad Anáhuac Mexico Norte. Avenida Lomas Anáhuac 46, Col. Lomas Anáhuac, Huixquilucan 52786, Mexico
3
Facultad de Ciencias Químicas e Ingeniería P.A. Ing. Mecánica, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca 62209, Morelos, Mexico
4
CIICAp, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca 62609, Mexico
5
CONACYT, CIATEQ, Unidad San Luis Potosí, Eje 126 No. 225, Zona Industrial, San Luis Potosí 78395, Mexico
6
Instituto de Ciencias Físicas-UNAM, Av. Universidad 1001, Col. Chamilpa, Cuernavaca 62609, Mexico
*
Author to whom correspondence should be addressed.
Metals 2019, 9(8), 863; https://doi.org/10.3390/met9080863
Received: 7 June 2019 / Revised: 9 July 2019 / Accepted: 12 July 2019 / Published: 7 August 2019
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Abstract

Light aluminum alloys have a great importance in industry owing to generally accessible costs, low density, good machinability, and corrosion resistance under certain environments. The present work studies aging treatments that preform important roles on the distribution and microstructural changes of two AlMg-Zn alloys, and the resulting effect on the corrosion behavior. The experimental AlMg-Zn alloys were cast and then heat treated at 200 °C, after the solubilization treatments were made, using different treatment times. These alloys showed important changes in their corrosion mechanisms, but mainly, corrosion started at AlxMgyZnz complex phases in both alloys. The optimal corrosion rates were reached after 5 and 24 h of heat treatment. These results were obtained through electrochemical techniques in NaCl solutions, and by metallographic analysis using SEM and optical microscopy. View Full-Text
Keywords: artificial aging; new aluminum alloys; sacrificial anodes artificial aging; new aluminum alloys; sacrificial anodes
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Hernández, A.; Torres, Á.; Serna, S.; Mayén, J.; Campillo, B. Effect of Experimental Aging on the Performance of Al-7.9Mg-13.3Zn and Al-10.5Mg-8.6Zn Alloys as Sacrificial Anodes. Metals 2019, 9, 863.

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