The effect of fluoride ions on the corrosion behavior of pure titanium in 0.05M sulfuric acid

Wang, Z.B.; Hu, Hongxiang; Liu, C.B.; Zheng, Yuan

doi:10.1016/j.electacta.2014.05.055

Cited by 226 publications

(95 citation statements)

References 37 publications

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“…In addition, it has been found that the critical value of the fluoride concentration depends on the extent of interaction of fluoride ions with oxide films [20]. The fluoride ion will not interact with the entire film until the fluoride concentration exceeds the critical value [20]. Accordingly, it is reasonable to speculate that the critical value of the fluoride concentration will be higher in the case of thicker oxide film, because it needs more fluoride ions to interact with the film.…”

Section: Effect Of the Oxide Film On Corrosion Behavior Of Welded Titmentioning

confidence: 95%

“…It indicates that their corrosion resistances are superior to those of as-polished samples that exhibit active-passive behaviors, due to the oxide film formed. In addition, it has been found that the critical value of the fluoride concentration depends on the extent of interaction of fluoride ions with oxide films [20]. The fluoride ion will not interact with the entire film until the fluoride concentration exceeds the critical value [20].…”

Section: Effect Of the Oxide Film On Corrosion Behavior Of Welded Titmentioning

confidence: 99%

“…However, HF in the simulated condensates can seriously deteriorate the corrosion resistance of titanium when the content exceeds a critical value related to pH value [20]. The effect of fluoride ions on the corrosion behavior of pure titanium in 0.05 mol/L H 2 SO 4 has been investigated, and the results indicated that the critical value of the fluoride concentration was 0.0005 mol/L (about 0.001 wt%) at pH value of 1, which would decrease with lowering pH value [20]. Therefore, the critical value of fluoride content would be lower than 0.001 wt% at pH value of 0.78 for the simulated condensates.…”

Section: Potentiodynamic Polarization Testmentioning

confidence: 99%

“…Accordingly, it is reasonable to speculate that the critical value of the fluoride concentration will be higher in the case of thicker oxide film, because it needs more fluoride ions to interact with the film. Usually, the oxide film formed during welding is thicker than that formed in air or via spontaneous passivation (approximately 3 nm [20] ). From Fig.…”

Section: Effect Of the Oxide Film On Corrosion Behavior Of Welded Titmentioning

confidence: 99%

“…The contents of H 2 SO 4 , HCl, HNO 3 and H 3 PO 4 in the simulated condensates are low enough that titanium exhibits passivation behavior and high corrosion resistance [18,19]. However, HF in the simulated condensates can seriously deteriorate the corrosion resistance of titanium when the content exceeds a critical value related to pH value [20]. The effect of fluoride ions on the corrosion behavior of pure titanium in 0.05 mol/L H 2 SO 4 has been investigated, and the results indicated that the critical value of the fluoride concentration was 0.0005 mol/L (about 0.001 wt%) at pH value of 1, which would decrease with lowering pH value [20].…”

Section: Potentiodynamic Polarization Testmentioning

confidence: 99%

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Corrosion Behaviors of Pure Titanium and Its Weldment in Simulated Desulfurized Flue Gas Condensates in Thermal Power Plant Chimney

Wang

Liu

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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The corrosion behaviors of pure titanium and its weldment welded by tungsten inert gas (TIG) welding in simulated desulfurized flue gas condensates in thermal power plant chimney were investigated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and immersion tests. The effects of heat input and shielding gases on the corrosion behavior of the welded titanium were also studied. Grain coarsening and Widmanstätten structure were found in both the fusion zone and the heat-affected zone. The welded titanium exhibited active-passive behavior in the simulated condensates. Both the polarization curves and EIS measurements confirmed that TIG welding process with different parameters had few effects on the corrosion behavior. It was proved that the microstructure changes were not the key material factors affecting the corrosion behavior of pure titanium under the test conditions, while the oxide film had remarkable effect on improving the corrosion resistance.

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Section: Effect Of the Oxide Film On Corrosion Behavior Of Welded Titmentioning

confidence: 95%

Section: Effect Of the Oxide Film On Corrosion Behavior Of Welded Titmentioning

confidence: 99%

Section: Potentiodynamic Polarization Testmentioning

confidence: 99%

Section: Effect Of the Oxide Film On Corrosion Behavior Of Welded Titmentioning

confidence: 99%

Section: Potentiodynamic Polarization Testmentioning

confidence: 99%

See 3 more Smart Citations

Corrosion Behaviors of Pure Titanium and Its Weldment in Simulated Desulfurized Flue Gas Condensates in Thermal Power Plant Chimney

Wang

Liu

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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Effect of Hydrogen Precharging on Mechanical and Electrochemical Properties of Pure Titanium

et al. 2020

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The electrolytic hydrogen precharging process is used to analyze the influence of hydrogen on the microstructure, corrosion resistance, and mechanical properties of pure titanium. The results demonstrate that two types of titanium hydrides (δ‐TiHx and ϵ‐TiH2) are detected by electron backscatter diffraction (EBSD), and the volume fraction of titanium hydrides, the local strain caused by hydrogen precipitation, and the thickness of hydrides layer increase with the increase in precharging time. It is noteworthy that the formation of hydrides layer has a protective effect on general corrosion, but the local strain caused by hydrides precipitation leads to the destruction of corrosion resistance, as a result the corrosion resistance of pure titanium increases first and then decreases with the increase in hydrogen precharging time. Moreover, with the precipitation of hydrides, the fracture mode changes from ductile failure to duplex‐ and multimode failure, resulting in the decrease in ultimate tensile strength (UTS) and elongation. Therefore, the mechanical and electrochemical properties of the precharged samples first increase and then decrease with the increase in precharging time, reaching their optimum values at 10 h, and the critical precharging time is determined to be 75 h when comparing those properties with pure titanium.

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A Novel Al‐Rich/Ti–6Al–4V Layered Composite with Superior Wear and Electrochemical Behavior

et al. 2020

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By adding a certain amount of Al to the surface of Ti–6Al–4V (TC4) alloy, a novel layered composite composed of TC4 alloy matrix and Al‐rich alloy is designed and successfully fabricated by a blended elemental powder metallurgy (BE PM) method. The results demonstrated that after the addition of 1 wt% Al, the layered composite exhibits superior wear and electrochemical behavior over powder metallurgy Ti–6Al–4V (PM TC4) alloy, which indicates that a wear‐resistant and corrosion‐resistant layer can be in situ synthesized on the sample surface. Moreover, the volume fraction of α phase, the thickness of α colonies, porosity, Rockwell hardness, and wear resistance of the layered composites increase significantly with Al addition, resulting in the decrease in area, width, and depth of wear tracks, and the reduction of average friction coefficients (COFs). Furthermore, with the addition of Al, the galvanic effect at the interface of α/β phase reduces, whereas the porosity of the layered composites, the chemical activity, and the corrosion rate of α phase increase significantly. Therefore, the corrosion resistance of the layered composites increases first and then decreases with Al addition, and the optimum value can be achieved when the added amount of Al is 1 wt%.

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The effect of fluoride ions on the corrosion behavior of pure titanium in 0.05M sulfuric acid

Cited by 226 publications

References 37 publications

Corrosion Behaviors of Pure Titanium and Its Weldment in Simulated Desulfurized Flue Gas Condensates in Thermal Power Plant Chimney

Corrosion Behaviors of Pure Titanium and Its Weldment in Simulated Desulfurized Flue Gas Condensates in Thermal Power Plant Chimney

Effect of Hydrogen Precharging on Mechanical and Electrochemical Properties of Pure Titanium

A Novel Al‐Rich/Ti–6Al–4V Layered Composite with Superior Wear and Electrochemical Behavior

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