Mechanism for the Acid Corrosion Behavior of Neutron-Irradiated Uranium

Kindlimann, L. E.; Greene, N. D.

doi:10.5006/0010-9312-26.7.289

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The applications of metallic uranium are severely limited due to its terrible anti-corrosion properties, low yield strength and low hardness. However, alloying of uranium could overcome these disadvantages, as it has wide applications in the nuclear industry [1,2]. In comparison with other uranium alloy, uranium-titanium alloy could significantly improve the mechanical properties as well as anti-corrosion properties by adding much less alloying element, making it receive wide applications in the nuclear energy industry and military field [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Influences of pH Values’ Changes on the Oxide Film of U-0.79 wt.% Ti Alloy in Aqueous Solution—A Combined Study of Traditional Electrochemical Tests and Scanning Reference Electrode Technique

et al. 2019

View full text Add to dashboard Cite

By combining traditional electrochemical tests including Tafel extension method and Mott-Schottky fitting, spectroscopic ellipsometry (SE) and a micro-region analysis technique, which is an integrated system of a scanning reference electrode technique and scanning tunneling microscope (SRET/STM), the changes in properties of the oxide film that formed on the surface of the U-0.79 wt.% Ti alloy (U-Ti alloy in short) in 0.1 M NaNO3 were carefully investigated as the pH value changed. The results show that the properties of the oxide film are strongly pH-dependent. The corrosion potential and corrosion current density decrease with the increasing pH value. The oxide film appears to be a p-type semiconductor at pH = 2.43. However, the transition from n-type to p-type for the oxide film as a semiconductor is observed with the increasing applied potential when the solution pH value varies from 2.43 to 7.0. The oxide film presents as an n-type semiconductor when the pH value varies from 7.0 to 11.44. In addition, during the transition of the pH, the roughness and the number of active points of the alloy surface decreases while the oxide film is thicker. It can be concluded that the corrosion resistance of the oxide film formed on the U-Ti alloy surface is enhanced in neutral or alkaline solutions.

show abstract