TY - JOUR AU - Samaniego-Gámez, Pedro AU - Almeraya-Calderón, Facundo AU - Martin, Ulises AU - Ress, Jacob AU - Gaona-Tiburcio, Citlalli AU - Silva-Vidaurri, Luis AU - Cabral-Miramontes, José AU - Bastidas, José M. AU - Chacón-Nava, José G. AU - Bastidas, David M. PY - 2020/12/14 Y2 - 2024/03/28 TI - Effect of sealing treatment on the corrosion behavior of anodized AA2099 aluminum-lithium alloy JF - Revista de Metalurgia JA - Rev. metal. VL - 56 IS - 4 SE - Articles DO - 10.3989/revmetalm.180 UR - https://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/1494 SP - e180 AB - <p>The corrosion behavior of the sulphuric-anodized AA2099 using two different current densities, 0.19 or 1.0 A·cm<sup>−2</sup>, with two different sealing treatments in H<sub>2</sub>O and 6 wt.% Na<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> at 95 °C was studied in 3.5 wt.% NaCl and 10 vol.% H<sub>2</sub>SO<sub>4</sub> 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.% Na<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> 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.</p> ER -