Corrosion resistance improvement of magnesium alloy using nitrogen plasma ion implantation

Xia, Tian; Wei, Caihong; Yang, Shilin; Fu, Ricky K.Y.; Chu, Paul K.

doi:10.1016/j.surfcoat.2004.10.117

Cited by 78 publications

(38 citation statements)

References 19 publications

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“…While the film covered on the surface of Mg or Mg alloy only consists of MgO, the ratio of the volume of MgO to the volume of the consuming Mg will be less than 1. Therefore, the film is loose and cannot offer an effective resistance to corrosion, such as the natural oxide layer on magnesium surface [5].…”

Section: The Comparison With Haementioning

confidence: 99%

“…These properties make magnesium alloys valuable in a number of applications including the automotive industry, computer parts, the aerospace industry and cellular phones where weight reduction is concerned [1][2][3][4]. However, magnesium and its alloys are characterized by low corrosion resistance, which has limited their use and the natural oxide layer on magnesium surfaces is very loose and cannot offer an effective resistance to corrosion [5]. Therefore, it is very important to improve the anti-corrosion performances of magnesium alloys in industrial applications.…”

Section: Introductionmentioning

confidence: 99%

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The anodization of ZK60 magnesium alloy in alkaline solution containing silicate and the corrosion properties of the anodized films

Cheng

Chen

et al. 2007

Applied Surface Science

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Section: The Comparison With Haementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The anodization of ZK60 magnesium alloy in alkaline solution containing silicate and the corrosion properties of the anodized films

Cheng

Chen

et al. 2007

Applied Surface Science

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“…To improve the corrosion resistance of Mg alloys, several techniques have been employed, including development of new Mg alloys [8,9], surface modification via nitrogen ion implantation [10,11], anodizing [12], and the use of conversion coatings [13][14][15]. Among these technologies, silane based anticorrosive coatings of Mg alloys have been proven to be effective, economical and environmentally benign [16,17].…”

Section: Introductionmentioning

confidence: 99%

Biofunctionalized anti-corrosive silane coatings for magnesium alloys

et al. 2013

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Biodegradable magnesium alloys are advantageous in various implant applications, as they reduce the risks associated with permanent metallic implants. However, a rapid corrosion rate is usually a hindrance in biomedical applications. Here we report a facile two step procedure to introduce multifunctional, anticorrosive coatings on Mg alloys, such as AZ31. The first step involves treating the NaOH-activated Mg with bistriethoxysilylethane to immobilize a layer of densely crosslinked silane coating with good corrosion resistance; the second step is to impart amine functionality to the surface by treating the modified Mg with 3-amino-propyltrimethoxysilane. We characterized the two-layer anticorrosive coating of Mg alloy AZ31 by Fourier transform infrared spectroscopy, static contact angle measurement and optical profilometry, potentiodynamic polarization and AC impedance measurements. Furthermore, heparin was covalently conjugated onto the silane-treated AZ31 to render the coating haemocompatible, as demonstrated by reduced platelet adhesion on the heparinized surface. The method reported here is also applicable to the preparation of other types of biofunctional, anti-corrosive coatings and thus of significant interest in biodegradable implant applications.Keywords coatings, magnesium, alloys, corrosive, biofunctionalized, silane, anti Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsLiu, X., Yue, Z., Romeo, T., Weber, J., Scheuermann, T., Moulton, S. & Wallace, G. (2013). Biofunctionalized anti-corrosive silane coatings for magnesium alloys. Acta Biomaterialia, 9 (10), 8671-8677. AuthorsXiao Liu, Zhilian Yue, Tony Romeo, Jan Weber, Torsten Scheuermann, Simon E. Moulton, and Gordon G. Wallace AbstractBiodegradable magnesium (Mg) alloys are advantageous in various implant applications, as they reduce the risks associated with permanent metallic implants. However, the fast corrosion rate is usually a hindrance in biomedical applications. Here we report a facile twostep procedure to introduce multifunctional, anticorrosive coatings on Mg alloys, such as AZ31. The first step involves treating the NaOH-activated Mg with bistriethoxysilylethane (BTSE) to immobilise a layer of densely crosslinked silane coating with good corrosion resistance; the second step is to impart amine functionality to the surface by treating the modified Mg with 3-amino-propyltrimethoxysilane (γ-APS). We characterised the two-layer anticorrosive coating of AZ31 Mg alloy by Fourier transform infrared spectroscopy, static contact angle measurement and optical profilometry, potentiodynamic polarization and AC impedance measurements. Furthermore, heparin was covalently conjugated onto the silane treated AZ31 to render the coating haemocompatible, as demonstrated by reduced platelet adhesion on the heparinised surface. The method reported here is also applicable to the preparation of other types of biofunctional, anticorrosive coatings, and thus of significant interest in biodegradable implant applications.

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“…Atomic nitrogen is used as the ion that should be implanted on the target surface. Nitrogen implantation of steel surfaces by PIII has shown to improve mechanical properties and corrosion performance [17,18]. Nitrogen plasma density is assumed n o = 5 9 10 14 m -3…”

Section: Fluid Model and Basic Equationsmentioning

confidence: 99%

Influence of ion-neutral collision parameters on dynamic structure of magnetized sheath during plasma immersion ion implantation

Khoram

Ghomi

2016

J Theor Appl Phys

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A cold magnetized plasma sheath is considered to examine the gas pressure effect on the sheath dynamics. A fluid model is used to describe the plasma sheath dynamic. The governing fluid equations in the plasma are solved from plasma center to the target using the finite difference method and some convenient initial and boundary conditions at the plasma center and target. It is found that, the ion-neutral collision has significant effect on the dynamic characteristics of the high-voltage sheath in the plasma immersion ion implantation (PIII). It means that, the temporal profile of the ion dose on the target and sheath width are decreased by increasing the gas pressure. Also, the gas pressure substantially diminishes the temporal psychograph of ion incident angle on the target.

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Corrosion resistance improvement of magnesium alloy using nitrogen plasma ion implantation

Cited by 78 publications

References 19 publications

The anodization of ZK60 magnesium alloy in alkaline solution containing silicate and the corrosion properties of the anodized films

The anodization of ZK60 magnesium alloy in alkaline solution containing silicate and the corrosion properties of the anodized films

Biofunctionalized anti-corrosive silane coatings for magnesium alloys

Influence of ion-neutral collision parameters on dynamic structure of magnetized sheath during plasma immersion ion implantation

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