Investigation of hydroxyapatite (HAP) containing coating on grade 2 titanium alloy prepared by plasma electrolytic oxidation (PEO) at low voltage

Kostelac, Lorena; Pezzato, Luca; Settimi, Alessio Giorgio; Franceschi, Mattia; Gennari, Claudio; Brunelli, Katya; Rampazzo, Chiara; Dabalà, Manuele

doi:10.1016/j.surfin.2022.101888

Cited by 28 publications

(21 citation statements)

References 44 publications

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“…The lower voltage is presumably more promising for also creating an anticorrosion layer. Such results are not surprising, as confirmed by several works [ 7 , 10 , 17 ]. As can be noticed, the MAO coatings built on porous SLM-made structures are characterized by the worst corrosion resistance among all of the presented modifications.…”

Section: Resultssupporting

confidence: 77%

“…There have been some papers in the last few years describing corrosion parameters of different coatings deposited or layers created on titanium [ 1 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ] and its alloys: Ti6Al4V [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ], Ti13Nb13Zr [ 14 , 24 , 25 , 26 , 27 ]. The coatings were designed and produced particularly to enhance corrosion resistance [ 1 , 4 , 6 , 7 , 8 , 9 , 11 , 16 , 17 , 18 , 19 , 21 , 22 , 23 , 24 ] or the corrosion characteristics were determined only to verify whether and to what extent the applied coating may affect the degradation process [ 5 , 10 , 12 , 13 , 14 , 15 , 20 , 25 ]. The main difference between coated materials was the presence or the absence of an artificial titanium oxide layer created by oxidation in different conditions [ …”

Section: Introductionmentioning

confidence: 99%

“…The coatings were designed and produced particularly to enhance corrosion resistance [ 1 , 4 , 6 , 7 , 8 , 9 , 11 , 16 , 17 , 18 , 19 , 21 , 22 , 23 , 24 ] or the corrosion characteristics were determined only to verify whether and to what extent the applied coating may affect the degradation process [ 5 , 10 , 12 , 13 , 14 , 15 , 20 , 25 ]. The main difference between coated materials was the presence or the absence of an artificial titanium oxide layer created by oxidation in different conditions [ 1 , 3 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 15 , 19 , 20 ] such as direct voltage anodic oxidation, micro-arc oxidation (MAO), or hydrothermal oxidation. The coatings other than rutile/anatase were composed of some metals [ 12 ], polymers [ 4 , 5 , 11 , 13 , 14 , 15 , 16 ], organic compounds [ 25 ], ceramics [ 5 , 9 , 10 , 23 , 24 …”

Section: Introductionmentioning

confidence: 99%

“…The main difference between coated materials was the presence or the absence of an artificial titanium oxide layer created by oxidation in different conditions [ 1 , 3 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 15 , 19 , 20 ] such as direct voltage anodic oxidation, micro-arc oxidation (MAO), or hydrothermal oxidation. The coatings other than rutile/anatase were composed of some metals [ 12 ], polymers [ 4 , 5 , 11 , 13 , 14 , 15 , 16 ], organic compounds [ 25 ], ceramics [ 5 , 9 , 10 , 23 , 24 , 25 , 26 , 27 ], oxides [ 5 , 6 , 8 , 9 , 12 , 19 , 22 , 24 , 25 ], graphene and carbides [ 1 , 18 , 20 ], and bioglass [ 17 ]. It is to underline that the most effective way to increase the corrosion resistance of titanium surfaces is to create a smooth and nonpermeable oxide layer.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Surface Modification of Titanium and Its Alloys for Medical Implants on Their Corrosion Behavior

et al. 2022

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Titanium and its alloys are often used for long-term implants after their surface treatment. Such surface modification is usually performed to improve biological properties but seldom to increase corrosion resistance. This paper presents research results performed on such metallic materials modified by a variety of techniques: direct voltage anodic oxidation in the presence of fluorides, micro-arc oxidation (MAO), pulse laser treatment, deposition of chitosan, biodegradable Eudragit 100 and poly(4-vinylpyridine (P4VP), carbon nanotubes, nanoparticles of TiO2, and chitosan with Pt (nano Pt) and polymeric dispersant. The open circuit potential, corrosion current density, and potential values were determined by potentiodynamic technique, and microstructures of the surface layers and coatings were characterized by scanning electron microscopy. The results show that despite the applied modifications, the corrosion current density still appears in the region of very low values of some nA/cm2. However, almost all surface modifications, designed principally for the improvement of biological properties, negatively influence corrosion resistance. The reasons for observed effects can vary, such as imperfections and permeability of some coatings or accelerated degradation of biodegradable deposits in simulated body fluids during electrochemical testing. Despite that, all coatings can be accepted for biological applications, and such corrosion testing results are presumed not to be of major importance for their applications in medicine.

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Section: Resultssupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Surface Modification of Titanium and Its Alloys for Medical Implants on Their Corrosion Behavior

et al. 2022

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“…It deposits on the surface of Ti, which is conducive to combining with living bone and promoting the growth of osseous tissue. Kostelac et al (2022) prepared a 2grade titanium alloy bioactive coating with HAP as the main component by the plasma electrolytic oxidation process. The cell adhesion biological test showed that the coating had excellent cytocompatibility with human cells, and the cell adhesion performance was improved compared with that of untreated samples.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser treatment promotes the surface bioactivity and bone ingrowth of Ti6Al4V bone scaffolds

Wang

Zhang

Liu

et al. 2022

Front. Bioeng. Biotechnol.

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In this study, a femtosecond laser with a wavelength of 800 nm was used to modify the surface of a titanium alloy bone scaffold created via selective laser melting (SLM). The outcomes demonstrated that the surface morphology of the bone scaffold after femtosecond laser treatment was micro-nano morphology. The hydrophobic structure of the scaffold was changed into a super-hydrophilic structure, improving the surface roughness, which was highly helpful for osteoblast adhesion and differentiation. The femtosecond laser surface treatment in vitro samples produced a thick layer of hydroxyapatite (HAP) with improved surface bioactivity. The effectiveness of osseointegration and interstitial growth of the specimens treated with the femtosecond laser surface were found to be better when bone scaffolds were implanted into the epiphysis of the tibia of rabbits. As a result, femtosecond laser therapy dramatically enhanced the surface activity of bone scaffolds and their capacity to integrate with the surrounding bone tissues, serving as a trustworthy benchmark for future biological scaffold research.

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A Review on the Application‐Focused Assessment of Plasma Electrolytic Oxidation (PEO) Coatings Using Electrochemical Impedance Spectroscopy

Dilimon

Shibli

2023

Adv Eng Mater

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Background of this ReviewPlasma electrolytic oxidation (PEO), micro-arc oxidation, and micro-plasma oxidation are alternative names for the same surfacecoating technology for producing multiple layers of ceramic oxides on the surface of light valve metals such as Al, Mg, Ti, Zr, Ta, Nb, Hf, and their alloys. Oxidation potentials higher than the dielectric breakdown voltage of the first formed passive film are applied through a suitable electrolyte. This high applied potential (400-600 V or higher) generates plasma discharges on the workpiece metal surface, and this plasma creates ideal conditions of high temperatures and pressures for the formation of hardened, crystalline, well-adherent, and corrosion-resistant oxide layers.The PEO process has several benefits over the conventional electrolytic oxidation process. Surface coatings formed through the PEO process have two to four times higher hardness. Their unique porous outer layer permits material scientists and engineers to customize the coating performance by incorporating different reagents, particles, and functionalities. The coating thickness can be varied from a few micrometers to more than 100 μm depending on the final target application of PEO coatings. The chemical passivity and inertness of PEO coatings enable their application in harsh environments. Reduced stiffness and crack-free edges of PEO coatings give better adhesion, making them suitable for applications under mechanical strain or thermal cycling. Also, PEO coatings technology is used for making biodegradable orthopedic implants. [1,2] PEO process with nontoxic electrolytes is an environmentally friendly technology. Qin et al. reported the preparation method of degradation resistant and in vitro cytocompatible PEO coatings on biomedical Mg alloys in green, nontoxic, and recyclable electrolytes. [3] Recent review papers describe the present status of PEO coating technology on different metals and alloys. [4][5][6][7][8][9] The last 20 years show a remarkable increase in publication numbers related to PEO coatings (Figure 1). Among them, the number of publications describing electrochemical impedance spectroscopy (EIS) for PEO coating analysis is also considerably increasing (Figure 1).The PEO coatings contain various oxides of base metals, additives, and electrolyte-borne species from the electrolyte. [10][11][12] Recent review papers describe in detail the effect of particle addition into the PEO coatings on the microstructure, composition, and corrosion behavior of coatings studied by different microscopic, spectroscopic, and electrochemical techniques. [13][14][15][16][17][18][19][20] Also, several recent research papers discuss the EIS assessment of particle-incorporated PEO coatings. [21][22][23] To a large extent, the inclusion of additives occurs in the PEO coating's outer layer, while the inner layer is mainly metal oxide of the substrate metal. [8] The size of incorporated particles in PEO coatings is in either nano or micro ranges. Recent review papers discuss the PEO coating's perfor...

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Investigation of hydroxyapatite (HAP) containing coating on grade 2 titanium alloy prepared by plasma electrolytic oxidation (PEO) at low voltage

Cited by 28 publications

References 44 publications

Influence of Surface Modification of Titanium and Its Alloys for Medical Implants on Their Corrosion Behavior

Influence of Surface Modification of Titanium and Its Alloys for Medical Implants on Their Corrosion Behavior

Femtosecond laser treatment promotes the surface bioactivity and bone ingrowth of Ti6Al4V bone scaffolds

A Review on the Application‐Focused Assessment of Plasma Electrolytic Oxidation (PEO) Coatings Using Electrochemical Impedance Spectroscopy

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