Microstructure and corrosion behavior of the Ti-V-Cr-Nb high-entropy alloys in 3.5 wt% NaCl solution

Yao, Jie-Yi; Serrano, Leandro Bernardes; Santos, Sydney Ferreira; Cardoso, Kátia Regina

doi:10.1016/j.corsci.2023.111149

Cited by 17 publications

(3 citation statements)

References 62 publications

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“…17 During the normal corrosion process, a passivation film is formed on the metal surface, which changes the state of the metal from active to passive, thus improving its corrosion resistance. 18,19 When active halogen ions come into contact with metal surfaces due to their small size, they diffuse easily into the metal passivation films and increase the ionic conductivity. The aggressive ions establish contact with the metal substrate, which causes the metal to dissolve, resulting in vacancy on the metal surface and eventually causing point corrosion.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, their excellent heat resistance renders them widely useful in the field of plastic antibacterial modification. − Recently, polypentamethylene guanidine hydrochloride (PPMG), which is synthesized from biobased pentamethylene diamine, has attracted significant attention as a green antibacterial agent. , However, similar to the use of ordinary guanidine salts, the long-term use of this antibacterial agent corrodes the processing equipment, specifically at high temperatures . During the normal corrosion process, a passivation film is formed on the metal surface, which changes the state of the metal from active to passive, thus improving its corrosion resistance. , When active halogen ions come into contact with metal surfaces due to their small size, they diffuse easily into the metal passivation films and increase the ionic conductivity. The aggressive ions establish contact with the metal substrate, which causes the metal to dissolve, resulting in vacancy on the metal surface and eventually causing point corrosion. − Conventionally, guanidine salts, containing chloride ions, can accelerate metal corrosion and adversely affect the equipment used .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of a Low Metal-Corrosive and High-Antibacterial Effective Guanidine Salt Oligomer via Ion Exchange

Wang,

et al. 2024

ACS Appl. Polym. Mater.

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Polypentamethylene guanidine sulfate (PPGS), a cationic antibacterial agent with low metal corrosivity, was synthesized by replacing chloride ions in polypentamethylene guanidine hydrochloride (PPMG) with sulfate ions using anion exchange resins. The results of corrosion experiments at high temperatures and in an aqueous solution suggested that PPGS exhibited better corrosion resistance than PPMG. The synthesized PPGS exhibited lower thermal stability and degradation occurred through the removal of sulfate groups. It showed strong intrinsic antimicrobial characteristics, which could change the morphological structure and rupture cell membranes. Furthermore, the minimal inhibitory concentrations of PPGS against Escherichia coli, Staphylococcus aureus, Bacillus subtilis, and Candida albicans were approximately 8, 2, 16, and 12 ppm, respectively. Molecular simulations indicated that the positive charges accumulated on the PPGS surface can provide the driving force to attract bacteria with a negative charge on the cell membrane's phospholipid layer.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of a Low Metal-Corrosive and High-Antibacterial Effective Guanidine Salt Oligomer via Ion Exchange

Wang,

et al. 2024

ACS Appl. Polym. Mater.

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“…Body-centered cubic (BCC) lightweight medium/high-entropy alloys (MEAs/HEAs) with a density of less than 7 g/cm 3 have wide application prospects in the aerospace field owing to their good comprehensive properties [1][2][3][4] . The reported BCC lightweight MEAs/HEAs mainly include IVB, VB, VIB groups of refractory metal elements Ti, Zr, V, Nb, Cr, Ta, etc [5][6][7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

A TiV-rich lightweight medium entropy alloy with excellent specific strength and good strain hardening ability

ru,

Zhu,

Sun

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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A novel TiVZr0.1Cr0.1 lightweight medium entropy alloy (MEA) with high specific strength and good strain hardening ability was developed in this study in order to satisfy the increased requirement for high performance light weight structure materials in the aerospace field. TiVZr0.1Cr0.1 MEA was rich in Ti and V elements, and consisted of body-centered cubic phase matrix, basket-like nanostructure in the grains, and Zr-rich irregular-shaped precipitates at the grain boundaries in the as-cast condition. The as-cast alloy exhibited a specific strength of 202 MPa/(g/cm3 )) and a uniform elongation exceeding 4%. After annealing, Zr-rich precipitates at the grain-boundaries were re-dissolved and the uniform elongation of the alloy exceeds 6%.

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Corrosion behavior of AlCrVTi light-weight high-entropy alloy coating in different corrosion environments

Xing,

Nie,

Jin

et al. 2023

Surf. Sci. Tech.

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The excellent corrosion resistance of high-entropy alloys (HEAs) has attracted widespread attention in recent years. The focus of research is gradually shifting from the performance characterization to the composition design and application that balance multiple performance. In this study, the AlCrVTi light-weight HEA has been chosen to investigate the corrosion behavior in the electrochemical and salt spray environment. The results show that HEA coating prepared by plasma spray followed laser re-melting present a homogeneous single-phase microstructure. The active Ti and V elements promote the formation of passive film during corrosion, which improves the corrosion resistance of HEA coating. Therefore, the HEA presents a higher corrosion resistance compared with 304 stainless steel (SS304), which is reflected in the lower corrosion current density. In the salt spray environment, the coating still presents the pitting corrosion, which is same as in the electrochemical environments. It is demonstrated that the AlCrVTi HEA has the potential that balancing the corrosion resistance and mechanical properties.

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Microstructure and corrosion behavior of the Ti-V-Cr-Nb high-entropy alloys in 3.5 wt% NaCl solution

Cited by 17 publications

References 62 publications

Synthesis of a Low Metal-Corrosive and High-Antibacterial Effective Guanidine Salt Oligomer via Ion Exchange

Synthesis of a Low Metal-Corrosive and High-Antibacterial Effective Guanidine Salt Oligomer via Ion Exchange

A TiV-rich lightweight medium entropy alloy with excellent specific strength and good strain hardening ability

Corrosion behavior of AlCrVTi light-weight high-entropy alloy coating in different corrosion environments

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