Effect of sealing treatment on the corrosion behavior of anodized AA2099 aluminum-lithium alloy

Samaniego Gámez, Pedro Oliver y Almeraya Calderón, Facundo y Martin Díaz, Ulises y Ress, Jacob y Gaona Tiburcio, Citlalli y Silva Vidaurri, Luis Gerardo y Cabral Miramontes, José Ángel y Bastidas, José María y Chacón Nava, José G. y Bastidas, David M. (2020) Effect of sealing treatment on the corrosion behavior of anodized AA2099 aluminum-lithium alloy. Revista de Metalurgia, 56 (4). pp. 1-9. ISSN 0034-8570

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URL o página oficial: https://doi.org/10.3989/revmetalm.180

Resumen

The corrosion behavior of the sulphuric-anodized AA2099 using two different current densities, 0.19 or 1.0 A·cm−2, with two different sealing treatments in H2O and 6 wt.% Na2Cr2O7 at 95 °C was studied in 3.5 wt.% NaCl and 10 vol.% H2SO4 solutions. The AA2099 is widely used in aeronautical applications, thus it is essential to present good corrosion performance in chloride and acid rain environments. The surface morphology of the anodized film was characterized by scanning electron microscopy (SEM), the electrochemical corrosion behavior was studied using electrochemical impedance (EIS), and finally characterization of the surface chemical composition was revealed by X-ray photoelectron spectroscopy (XPS). It was found the 6 wt.% Na2Cr2O7 sealing treatment imparts a more homogeneous and compact passive layer, and tends to increase the charge transfer resistance, thus improving the corrosion behavior of the anodized AA2099.

Tipo de elemento:

Article

Palabras claves no controlados:

Aleación de aluminio-litio AA2099, Anodizado, Corrosión, Impedancia electroquímica, SEM, XPS

Materias:

CONACYT > Ingeniería y Tecnología
T Tecnología > TA Ingeniería General y Civil

Divisiones:

Ingeniería Mecánica y Eléctrica

Usuario depositante:

Dra Citlalli Gaona

Creadores:

Creador	Email	ORCID
Samaniego Gámez, Pedro Oliver	NO ESPECIFICADO	NO ESPECIFICADO
Almeraya Calderón, Facundo	NO ESPECIFICADO	orcid.org/0000-0002-3014-2814
Martin Díaz, Ulises	NO ESPECIFICADO	NO ESPECIFICADO
Ress, Jacob	NO ESPECIFICADO	NO ESPECIFICADO
Gaona Tiburcio, Citlalli	NO ESPECIFICADO	orcid.org/0000-0001-9072-3090
Silva Vidaurri, Luis Gerardo	NO ESPECIFICADO	NO ESPECIFICADO
Cabral Miramontes, José Ángel	NO ESPECIFICADO	orcid.org/0000-0003-1483-3081
Bastidas, José María	NO ESPECIFICADO	NO ESPECIFICADO
Chacón Nava, José G.	NO ESPECIFICADO	NO ESPECIFICADO
Bastidas, David M.	dbastidas@uakron.edu	NO ESPECIFICADO