Journal
CORROSION SCIENCE
Volume 169, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108605
Keywords
Titanium; EIS; XPS; Polarization; Passive film
Funding
- National Key Research and Development Program of China [2017YFB0702300]
- National Natural Science Foundation of China [51901216, 51871028]
- Fundamental Research Funds for the Central Universities [FRF-TP-17-002B]
- China Postdoctoral Science Foundation [2019M652471]
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In this study, the different corrosion behaviors between alpha and beta phases of Ti6Al4V in solutions with different NaF concentrations are investigated. When the NaF concentration changes from 0.15 to 0.20 M, alpha phases are more likely to suffer from corrosion than beta phases. However, the formation of a repassive film makes alpha phases exhibit superior corrosion resistance than beta phases as the NaF concentration reaches 0.50 M. The mechanism analysis reveals that the formation of a repassive film on the a phases depends on not only the Al content but also on the active dissolution rate of Ti.
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