Open AccessIn vitro corrosion behavior of Ti-Mo-W alloys in artificial saliva
Author(s) -
Ştefan-Ioan Ghica,
Cosmin M. Cotruț,
Mihai Buzatu,
Iulian Antoniac,
Victor Geantă,
Mihai Buţu,
Mircea-Ionuţ Petrescu,
Radu Ştefănoiu,
Elena Ungureanu,
Gheorghe Iacob,
Razvan Ionescu
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/572/1/012028
Subject(s) - tafel equation , materials science , potentiostat , corrosion , saliva , titanium alloy , polarization (electrochemistry) , titanium , alloy , modulus , electrochemistry , metallurgy , composite material , biomedical engineering , chemistry , electrode , medicine , biochemistry
Titanium and its alloys are preferred materials used for medical devices manufacturing due to their specific properties. The corrosion behavior in artificial saliva of the newly developed Ti-Mo-W alloys, with elastic modulus closer to the human bone value was studied by means of linear polarization technique in the following steps: i) measurement/monitoring of open circuit potential (EOC) over 6 hours; ii) tracing linear polarization curves from ±200 mV (vs. OCP) - Tafel plots, with a scan rate of 0.167 mV/s. Electrochemical tests were performed according to ASTM G59-97 (2014)using a Potentiostat/Galvanostatto which a low current interface (LCI) was coupled. The tests were performedin Fusayama Meyer artificial saliva with a pH of 5.2 at the human body temperature (37±0.5°C) which mimic the oral environment. The results indicate that the alloys Ti15Mo7W and Ti15Mo11W have better corrosion behavior than Ti6Al4V.