Eventos Anais de eventos
COBEF 2017
Congresso Brasileiro de Engenharia de Fabricação
STUDY OF ANODIZATION TIME EFFECT ON THE CORROSION BEHAVIOR OF ZIRCALOY-4
Submission Author:
Laís Bertunes , SP
Presenter: Laís Bertunes
doi://10.26678/ABCM.COBEF2017.COF2017-0318
Abstract
In this study, the effect of anodizing time on the corrosion behavior of Zircaloy-4 alloy was studied in 3.5 wt.% NaCl solution at room temperature. The anodizing bath consisted of a HF solution and the process was achieved by applying a fixed potential of 20 V to Zircaloy-4 specimens. The corrosion behavior was evaluated by electrochemical impedance spectroscopy and potentiodynamic polarization. The tests were conducted over seven days of immersion. The anodized layer morphology was examined by scanning electron microscopy and the chemical composition was evaluated by X-ray photoelectron spectroscopy (XPS). By increasing the anodizing time, the corrosion resistance was improved. This behavior was related to the compactness of the anodized layer, which was dependent on the processing time.
Keywords
Zircaloy-4, anodizing, corrosion, potentiodynamic polarization
