Passivation behavior of a Zr60Cu20Ni8Al7Hf3Ti2 bulk metallic glass in sulfuric acid solutions - Université Claude Bernard Lyon 1 Accéder directement au contenu
Article Dans Une Revue International Journal of Electrochemical Science Année : 2018

Passivation behavior of a Zr60Cu20Ni8Al7Hf3Ti2 bulk metallic glass in sulfuric acid solutions

Résumé

The passivation behavior of Zr60Cu20Ni8Al7Hf3Ti2 bulk metallic glass (BMG) in H2SO4 solutions were studied by electrochemical measurements and X-ray photoelectron spectroscopy. The influence of H2SO4 solutions concentration and temperature, heat treatment temperature and erosion on passivation behavior were analyzed. The corrosion resistance of Zr60Cu20Ni8Al7Hf3Ti2 bulk metallic glass decreases slightly with the increase of concentration and temperature of H2SO4 solutions. The Zr-based BMG exhibits excellent passivation ability in various H2SO4 solutions. The formed passive films in H2SO4 solutions possess the semiconductor characteristics depending of applied potential, and show n-type semiconductor in stable passivation region. The main component of passive films is ZrO2 in competition with HfO2 and Al2O3, and no Ni element, and the alloy surface whose passive film contains less Cu and more Al2O3 and less Cu, hence the alloy exhibits can have better corrosion resistance. Annealing which temperatures are lower than Tg were conducted. After the heat treatment, Zr-based BMG maintains amorphous structure, and the electrochemical behavior of Zr-based BMG does not show obvious difference. However, the heat treatment improves BMG' micro-hardness. Consequently, the Zr-based BMG after heat treatment has stronger erosion-corrosion resistance than the as-cast BGM. © 2018 Published by ESG.

Domaines

Matériaux

Dates et versions

hal-01916310 , version 1 (08-11-2018)

Identifiants

Citer

J. Tang, Y. Wang, Q. Zhu, M. Chamas, H. Wang, et al.. Passivation behavior of a Zr60Cu20Ni8Al7Hf3Ti2 bulk metallic glass in sulfuric acid solutions. International Journal of Electrochemical Science, 2018, 13 (7), pp.6913-6929. ⟨10.20964/2018.07.17⟩. ⟨hal-01916310⟩
153 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More