Effect of welding on the microstructure and electrochemical corrosion of Al-Zn-Mg-Fe alloys
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Data
2000-01-01
Autores
Benedetti, Assis Vicente [UNESP]
Cabot, P. L.
Garrido, J. A.
Moreira, A. H.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
The effect of gas tungsten are welding on the microstructure and electrochemical corrosion of Al-Zn-Mg-Fe alloys submitted to different heat treatments (as fabricated, annealed and aged) has been studied using optical microscopy, SEM, TEM, EDX, cyclic voltammetry and corrosion potential measurements in chloride solutions. The electrochemical techniques were very sensitive to the change in the phase compositions produced by welding. Welding caused a decrease in the mean grain size, in the hardness and in the corrosion resistance of the age-hardened alloys. The structure of the latter became strongly altered by welding to lead to phase compositions very close to those of the cold rolled and annealed specimens. (C) 2000 Elsevier B.V. Ltd. All rights reserved.
Descrição
Palavras-chave
Al-Zn-Mg-Fe alloys, chloride, pitting, welding effect, cyclic voltammetry
Como citar
Electrochimica Acta. Oxford: Pergamon-Elsevier B.V., v. 45, n. 14, p. 2187-2195, 2000.