A study on the hot corrosion behavior of Ti–6Al–4V alloy

Anuwar, Mahesh; Jayaganthan, R.; Tewari, V.K.; Arivazhagan, N.

doi:10.1016/j.matlet.2006.07.058

Cited by 62 publications

(26 citation statements)

References 8 publications

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“…Yu et al have reported an increase in thickness of the oxide film with the potential, which play an important role in the improvement of the corrosion resistance [31]. Uniform surface corrosion of Ti-Nb or Ti-Nb-Zr alloys provides a passive film that is mainly formed by TiO 2 , Nb 2 O 5 , or ZrO 2 [14,15,32]. Compared to the film spontaneously formed in air, the polarization leads to a complete transformation from TiO or Ti 2 O 3 to TiO 2 (more stable) over 1.2 V (vs. SCE), which is helpful for improvement of corrosion resistance [33].…”

Section: Methodsmentioning

confidence: 99%

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Electrochemical corrosion behavior of biomedical Ti–22Nb and Ti–22Nb–6Zr alloys in saline medium

Wang

Zheng

Zhao

2009

Materials & Corrosion

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The aims of this study were to investigate the effects of Zr addition and potentiodynamic polarization on the microstructure and corrosion resistance of Ti-22Nb and Ti-22Nb-6Zr alloy samples. The corrosion tests were carried out in 0.9% NaCl at 37 8C and neutral pH value, utilizing the OCP, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) techniques. The results of XRD and optical microscopy indicated that the addition of Zr stabilized the b phase, which plays a crucial role in the corrosion resistance improvement of the Ti-22Nb-6Zr alloy. From the polarization curves, it can be seen that the alloys exhibited a wide passive region without the breakdown of the passive films and also low corrosion current densities. In addition, the values of the corrosion current densities and passive current densities decreased with the addition of 6 at% Zr into the Ti-22Nb alloy. The EIS results of these two alloy samples after 1-h immersion in 0.9% NaCl solution, and being fitted by R S (Q P R P ) model, suggested that the corrosion resistance of the passive films improved with the addition of Zr and only a single passive film formed on the surfaces. However, two time constants were observed for the Ti-22Nb and Ti-22Nb-6Zr alloy samples after potentiodynamic polarization, the spectra of which can be fitted using the R s (Q o (R o (Q b R b ))) model. In addition, the corrosion resistance of the two alloy samples was reinforced significantly because of polarization when compared to the immersed samples. All these observations suggested a nobler electrochemical behavior of the titanium alloys with the addition of Zr element and after polarization.

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Section: Methodsmentioning

confidence: 99%

“…A uniformly passive film consisted of Ti 2 O 3 , TiO 2 , and Nb 2 O 5 can be formed on the surface of the Ti-Nb alloys [14,15]. Mareci et al [16] compared the electrochemical corrosion behaviors of CP Ti, Ti-6Al-4V, Ti-5Al-2.5Fe, Ti-6Al-7Nb, and Ti-6Al-2Nb-1Ta-1Mo alloys in artificial saliva.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical corrosion behavior of biomedical Ti–22Nb and Ti–22Nb–6Zr alloys in saline medium

Wang

Zheng

Zhao

2009

Materials & Corrosion

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“…Generally, the degradation occurs on biomaterial surfaces due to the chemical reactions between titania and chloride ions in the media. The degradation of Ti-Nb alloys results in a passive film which is mainly formed by ␣-Ti 2 O 3 , TiO 2 (in rutile, brookite and/or anatase forms) and Nb 2 O 5 [25,28]. Tamilselvi et al [29] have recently carried out corrosion tests with Ti-6Al-4V and Ti-6Al-7Nb alloys in a saline solution (0.9% NaCl) and have reported that the corrosion current density decreases and the corrosion potential increases with increasing impressed potentials, and that the latter alloy has a much better corrosion resistance than the former one.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical corrosion behavior of a Ti–35Nb alloy for medical prostheses

Cremasco

Osório

Freire

et al. 2008

Electrochimica Acta

156

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“…With sodium chloride present in the test environment, the reaction of TiO 2 with chloride ions forming volatile TiCl 2 is also possible [23,25]. The TiCl 2 dissociates at elevated temperatures to titanium and chloride ions.…”

Section: Discussionmentioning

confidence: 99%

“…They also established that rhenium impedes grain growth and diffusion of oxygen and nitrogen into the titanium. The hot corrosion resistance of Ti-Al alloys [23][24][25] and TiAl-based intermetallics [26][27][28][29][30] has been determined in numerous papers; however, there is a lack of information about Ti-Re alloys. Therefore, the present paper concerns the corrosion behavior of Ti-Re alloys produced by SLM in the presence of Na 2 SO 4 and NaCl salts.…”

Section: Introductionmentioning

confidence: 99%

Hot Corrosion of Ti–Re Alloys Fabricated by Selective Laser Melting

et al. 2017

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Selective laser melting (SLM) is an additive manufacturing process that enables novel alloy production by combining metals with significantly different physical properties. In this paper, the hot corrosion behavior of Ti-Re alloys fabricated by SLM was studied in a mixture of Na 2 SO 4 and NaCl salts at 600°C. The morphology and composition of the corrosion products were characterized by scanning electron microscopy with energy-dispersive X-ray spectroscopy and X-ray diffraction to understand the degradation mechanisms. It has been shown that the hot corrosion resistance of Ti-Re alloys was influenced by the chemical inhomogeneity of the oxide scale resulting from the presence of rhenium particles undissolved during the SLM process.

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A study on the hot corrosion behavior of Ti–6Al–4V alloy

Cited by 62 publications

References 8 publications

Electrochemical corrosion behavior of biomedical Ti–22Nb and Ti–22Nb–6Zr alloys in saline medium

Electrochemical corrosion behavior of biomedical Ti–22Nb and Ti–22Nb–6Zr alloys in saline medium

Electrochemical corrosion behavior of a Ti–35Nb alloy for medical prostheses

Hot Corrosion of Ti–Re Alloys Fabricated by Selective Laser Melting

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