Corrosion resistance improvement of Ti-6Al-4V alloy by anodization in the presence of inhibitor ions

Martínez, Alejandra Leonor; Flamini, Daniel Omar; Saidman, S.B.

doi:10.1016/s1003-6326(22)65917-x

Cited by 16 publications

(7 citation statements)

References 42 publications

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“…The values obtained by CPP showed an increase in the current density (i corr ) in the Ti-6Al-4V anodized in KOH, which suggests that the process of oxygen and chloride evolution occurs on the surface, affecting the resistance of the anodized. However, the Ti-6Al-2Sn-4Zr-2Mo anodized in both media presented lower values of i corr , which occurs due to the presence of Mo, which inhibits the adsorption of Cl − ions, decreasing the dissolution process of the system [74]. On the other hand, when samples have the presence of V, corrosion resistance decreases, as can be observed in the samples anodized with Ti-6Al-4V when CPP presented higher values of i corr in comparison to the Ti-6Al-2Sn-4Zr-2Mo.…”

Section: Discussionmentioning

confidence: 93%

Corrosion Resistance of Titanium Alloys Anodized in Alkaline Solutions

Almeraya-Calderón,

Jáquez-Muñoz,

Maldonado-Bandala

et al. 2023

Metals

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Titanium alloys present superior electrochemical properties due to the generation of the TiO2 passive layer. The ability to generate an oxide passive layer depends on the anodized alloy. This work mainly studies the corrosion resistance of the alloys Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-4V anodized in NaOH and KOH at 1 M and 0.025 A/cm2 of current density. The electrochemical techniques were performed in a conventional three-electrode cell exposed to electrolytes of NaCl and H2SO4. Based on ASTM-G61 and G199, cyclic potentiodynamic polarization (CPP) and electrochemical noise (EN) techniques were used. The results indicated that Ti-6Al-2Sn-4Zr-2Mo anodized on NaOH presented a higher passivity range than anodized on KOH, relating to the high reactivity of Na+ ions. The former anodized alloy also demonstrated a higher passive layer rupture potential. In EN, the results showed that Ti-6Al-4V anodized in KOH presented a trend toward a localized process due to the heterogeneity of anodized porosity and the presence of V in the alloy.

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Section: Discussionmentioning

confidence: 93%

Corrosion Resistance of Titanium Alloys Anodized in Alkaline Solutions

Almeraya-Calderón,

Jáquez-Muñoz,

Maldonado-Bandala

et al. 2023

Metals

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“…12. 26,27 It can be observed that the toxic element content on the sample surface with coating method is lower than traditional polishing solution condition. Compared with the green polishing solution condition, the coating method can't effectively remove toxic elements on the surface sample which still have damaging effect to the human body.…”

Section: Experiments Resultsmentioning

confidence: 99%

Preparation and Performance Testing of Green Non-toxic Polishing Solution for Medical Titanium Alloy

Zhang,

Zou,

Pang

et al. 2024

ECS J. Solid State Sci. Technol.

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To obtain a lower toxic residue on medical titanium alloy surfaces in a chemical mechanical polishing (CMP) process, a new green polishing solution is proposed. The humoral fluid was selected as the basic solution in which the silica abrasive particles were used as the grinding particles, and H2O2 was added as the oxidant. A CMP test was carried out for its performance investigation with titanium alloy material. Then the surface roughness and material removal ratio were analyzed and compared with that of an existing polishing solution condition. Finally, the toxic residue of the titanium alloy samples was obtained by scanning electron microscopy. The experimental results indicate that a better material removal rate and surface roughness of titanium alloy with humoral polishing solution were obtained compared to existed polishing solution conditions. More importantly, the content of toxic elements on the sample surface was significantly reduced due to the greater amount of aluminum and vanadium ions dissolved in the polishing solution, which is more beneficial for its application in the medical prosthetics field. This study provides a new reference for the toxic residue reduction on the material surface of medical titanium alloy in CMP process.

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“…Martinez et al [69] related the increase in current density (icorr) to a passive layer that does not contribute to corrosion protection, and also associated the increase in current It is important to mention that the diffusion process begins in the oxide layer generated by the corrosion process due to the porosities of that part.…”

Section: Discussionmentioning

confidence: 99%

“…Martinez et al [69] related the increase in current density (i corr ) to a passive layer that does not contribute to corrosion protection, and also associated the increase in current density of passivation with an oxygen and chlorine evolution. Furthermore, they correlated the incorporation of Mo to inhibit chloride ion absorption.…”

Section: Discussionmentioning

confidence: 99%

Corrosion of Titanium Alloys Anodized Using Electrochemical Techniques

Jáquez-Muñoz

Gaona-Tiburcio

Méndez-Ramírez

et al. 2023

Metals

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The anodization of titanium has been an excellent option for protecting titanium and its alloys from corrosive environments such as acids and chloride systems, by generating a homogenous oxide layer. The objective of the current investigation was to evaluate the electrochemical corrosion behavior of alloys Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-4V anodized in 1M H2SO4 and H3PO4 solutions at a current density of 2.5 × 10–3 A/cm2. The anodization’s electrochemical characterization was achieved in NaCl and H2SO4 at 3.5% wt. electrolytes. Scanning electron microscopy (SEM) was employed to determine the anodized thickness and morphology. Cyclic potentiodynamic polarization (CPP) and electrochemical impedance spectroscopy (EIS), based on ASTM G61-86 and G106-15 Standards, were the electrochemical techniques mainly employed. The anodized samples presented a change in Ecorr values and a higher passivation zone. The EIS plot showed a higher resistance for samples anodized in H3PO4 and Ti-6Al-2Sn-4Zr-2Mo.

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Corrosion resistance improvement of Ti-6Al-4V alloy by anodization in the presence of inhibitor ions

Cited by 16 publications

References 42 publications

Corrosion Resistance of Titanium Alloys Anodized in Alkaline Solutions

Corrosion Resistance of Titanium Alloys Anodized in Alkaline Solutions

Preparation and Performance Testing of Green Non-toxic Polishing Solution for Medical Titanium Alloy

Corrosion of Titanium Alloys Anodized Using Electrochemical Techniques

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