چكيده لاتين :
This investigation potentiodynamically evaluates the corrosion behavior of a high strength titanium alloy, VT-9, in 4 M
sulfuric acid solution containing different concentrations (10, 20, 30 ppm) of the organic inhibitor, 2-phenyl-4-[(E)-1-(4-
sulfanylanilino)methylidene]-1,3-oxazole-5(4H)-one (L-SH), at different temperatures (293, 303 and 313 ± 1 K). The open circuit
potential values noted before and after each experiment varied appreciably with time. These values, in the presence of L-SH, were
negative before polarization, but after completion of the experiment turned positive and remained stable over a long period of
time. The cathodic current density values increased with increasing cathodic potential (more negative). The corrosion potential
(Ecorr) increased remarkably with the addition of L-SH. The corrosion current densities (Icorr), critical current density (Icr), and
passive current density (Ip) all decreased when L-SH was used. However, only the decrease in the Icorr with increasing amounts of
inhibitor was significant compared to that of Icr and Ip. L-SH expanded the range of the passive potential. SEM micrographs and
open circuit potential measurements revealed the formation of a uniform and protective film on the alloy surface in the presence
of L-SH, which acted as an efficient inhibitor.
