2020
DOI: 10.1016/j.corsci.2020.109015
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The contribution of Cr and Mo to the passivation of Ni22Cr and Ni22Cr10Mo alloys in sulfuric acid

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Cited by 53 publications
(42 citation statements)
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“…The corrosion resistance of Ti–STN, Ti–Sn, Ti–Ti, Ti–Nb, and Ti foil was first evaluated by linear sweep voltammetry measurement in a 0.1 M HClO 4 electrolyte to simulate the acidic operation environments. As shown in Figure a, the potentiodynamic polarization curves of all samples displayed the typical characteristics of anodic passivation, and it was found that the corrosion potentials ( E corr ) of these Ti-based substrates followed the trend of Ti–STN > Ti–Nb > Ti–Ti > Ti–Sn > Ti foil, which is consistent with the result of corrosion current density ( j corr ). The Ti–STN substrate had the highest E corr of 471 mV (vs reversible hydrogen electrode, RHE), which was 584 mV higher than Ti foil, 215 mV higher than Ti–Sn, 202 mV higher than Ti–Ti, and 155 mV higher than Ti–Nb; meanwhile, the j corr of Ti–STN (3.32 × 10 –3 μA cm –2 ) was 1 or 2 orders of magnitude lower than those of Ti–Nb, Ti–Ti, Ti–Sn, and Ti (Table ), which demonstrated that the STN interlayer had the best block effect for anodic corrosion. In addition, the protective efficiency ( P i ), a parameter to reflect the protective ability of the coatings against corrosion, was also calculated .…”
Section: Resultssupporting
confidence: 75%
“…The corrosion resistance of Ti–STN, Ti–Sn, Ti–Ti, Ti–Nb, and Ti foil was first evaluated by linear sweep voltammetry measurement in a 0.1 M HClO 4 electrolyte to simulate the acidic operation environments. As shown in Figure a, the potentiodynamic polarization curves of all samples displayed the typical characteristics of anodic passivation, and it was found that the corrosion potentials ( E corr ) of these Ti-based substrates followed the trend of Ti–STN > Ti–Nb > Ti–Ti > Ti–Sn > Ti foil, which is consistent with the result of corrosion current density ( j corr ). The Ti–STN substrate had the highest E corr of 471 mV (vs reversible hydrogen electrode, RHE), which was 584 mV higher than Ti foil, 215 mV higher than Ti–Sn, 202 mV higher than Ti–Ti, and 155 mV higher than Ti–Nb; meanwhile, the j corr of Ti–STN (3.32 × 10 –3 μA cm –2 ) was 1 or 2 orders of magnitude lower than those of Ti–Nb, Ti–Ti, Ti–Sn, and Ti (Table ), which demonstrated that the STN interlayer had the best block effect for anodic corrosion. In addition, the protective efficiency ( P i ), a parameter to reflect the protective ability of the coatings against corrosion, was also calculated .…”
Section: Resultssupporting
confidence: 75%
“…For NiMo/C , the Mo 3d spectra (Figure 3d) show two distinct components: Mo(IV) oxide (Mo 4+ ) composed by a doublet at 229.3±0.4 eV and 232.4±0.4 eV and Mo(VI) oxide (Mo 6+ ) at 232.4±0.0 eV and 235.5±0.0 eV [33] …”
Section: Resultsmentioning
confidence: 99%
“…In addition, some studies believe that the synergistic effect of Mo and Cr can also improve the corrosion resistance. Mo can be enriched in the rust layers and form ionselective Mo-contained layers, which promotes the protection effect of the Cr-contained rust layers [44,45].…”
Section: Electrochemical Corrosion Analysis 341 Polarization Curvementioning
confidence: 99%