Corrosion resistance of the dissimilar alloy AL6XN-Inconel 718 in 0.5 M NaCl

Autor: Natalya V Likhanova, Miguel A Cruz Castañeda, Paulina Arellanes-Lozada, Octavio Olivares-Xometl, Irina Lijanova, J Arriola-Morales
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Materials Research Express, Vol 8, Iss 8, p 086509 (2021)
Druh dokumentu: article
ISSN: 2053-1591
DOI: 10.1088/2053-1591/ac1b64
Popis: In the present work, the corrosion resistance of the dissimilar alloy AL6XN-Inconel 718 bound by the Gas Tungsten Arc Welding (GTAW) method was studied. Different alloy zones were analyzed: base materials (BMs), heat affected zones (HAZs) and welds. The effect exerted by the GTAW method on the corrosion resistance displayed by such dissimilar alloy in 0.5 M NaCl was established by means of corrosion studies employing potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) tests. The electrochemical results revealed that the alloy HAZs are more susceptible to corrosion due to microstructure changes caused mainly by elements such as Ni, Cr and Mo during the GTAW process.
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