4.7 Article

Potential dependent mechanism of the composition and electrochemical property of oxide films of Ti-6Al-3Nb-2Zr-1Mo

期刊

CORROSION SCIENCE
卷 213, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2023.110978

关键词

Ti80; Quantitative analysis; Effects of alloying elements; Potential dependent mechanism

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The potential-dependent mechanism of oxide film formation on Ti-6Al-3Nb-2Zr-1Mo in 0.5 M H2SO4 was investigated within a potential range of -0.80-5.00 V. The thicknesses of oxide films and the valence states of Ti, Al, Nb, and Mo were found to increase with increasing potential to 3.00 V, while surface roughness showed an opposite trend. The results indicated that higher potentials in the passive region led to better protection and uniformity of the oxide film. A schematic considering the effect of alloying elements within oxide films formed at different applied potentials on Ti-6Al-3Nb-2Zr-1Mo was established.
Potential dependent mechanism of the composition and electrochemical properties of oxide films formed on Ti-6Al-3Nb-2Zr-1Mo in 0.5 M H2SO4 at potential ranging within -0.80-5.00 V was studied. The quantitative calculation and qualitative analysis of thicknesses of oxide films and valence states of Ti and Al, Nb, Mo increase with potential increasing to 3.00 V, whereas surface roughness illustrates the opposite trend. The corrosion resistances and semiconductor properties results indicate better protection effect and uniformity of oxide film at higher potential in passive region. A schematic considering alloying elements effect within oxide films formed at different applied potential on Ti-6Al-3Nb-2Zr-1Mo is established.

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