Effect of scandium on microstructure and corrosion resistance of Ti64 alloy in NaCl solution

Deng, Tongsheng; Zhong, Xiuyang; Zhong, Ming; Lai, Yunhao; Zhu, Zhiyun; Zhang, Lina; Ojo, O.A.

doi:10.1016/j.matchar.2023.112671

Cited by 11 publications

(2 citation statements)

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“…Titanium and its alloys are characterized by their low density, high specific strength/ stiffness, and biocompatibility, as well as excellent corrosion and heat resistance [1][2][3][4][5]. The aforementioned characteristics render titanium alloy highly promising in the domains of aerospace engineering, marine engineering, and biomedical engineering [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…In terms of solution etching techniques, titanium and its alloys can be modified by H 2 SO 4 [2], HCl [20], NaCl [22], H 3 PO 4 [23], HF [24], or their combination. Ti-6Al-4V alloy is nowadays extensively employed as one of the most commonly utilized titanium alloys, consisting of α + β phases [3,22]. The Ti-6Al-4V extra low interstitial (ELI) alloy [12,25] has been developed as a modification of the Ti-6Al-4V alloy by reducing the content of carbon, oxygen, nitrogen, and iron elements with the aim of enhancing its physicochemical and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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The Study on Corrosion Resistance of Ti-6Al-4V ELI Alloy with Varying Surface Roughness in Hydrofluoric Acid Solution

Wang,

Cheng,

Chang

et al. 2024

Metals

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The corrosion resistance of titanium alloy poses a crucial challenge, significantly affecting its prospect for service and application. The present study aimed to investigate the corrosion resistance of Ti-6Al-4V ELI alloys with varying surface roughness in hydrofluoric acid solution, in order to assess the influence of roughness on their corrosion resistance performance. The weight loss percentage, surface morphology evolution, and roughness variation of Ti-6Al-4V ELI alloys before and after exposure to hydrofluoric acid corrosion were characterized. While the weight loss and weight loss percentage of the Ti-6Al-4V ELI alloy increased with prolonged corrosion, the overall weight loss rate decreased. The accumulation of TiF3 phases and depletion of the Ti-6Al-4V ELI matrix mutually led to the alterations of the surface roughness. Due to the inability to prevent fluoride ions from contacting with the Ti-6Al-4V ELI alloy, continuous corrosion occurred in hydrofluoric acid. Based on these experimental results and analysis, the corrosion mechanism of the Ti-6Al-4V ELI alloy corroded by hydrofluoric acid solution was elucidated. Furthermore, an analysis was conducted to explore the influence of corrosion time on mechanical properties by analyzing the decay in compressive properties of the Ti-6Al-4V ELI titanium alloy after hydrofluoric acid corrosion treatment. The bearing capacity of the Ti-6Al-4V ELI alloy deteriorated over the corrosion time.

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