An Investigation of Corrosion Resistance and Antibacterial Sensitivity Properties of Nano-Ag-Doped $$\hbox {TiO}_{2}$$ TiO 2 Coating and $$\hbox {TiO}_{2}$$ TiO 2 Coating Grown on NiTi Alloy with the Micro-Arc Oxidation Process

2017 ◽  
Vol 42 (6) ◽  
pp. 2329-2339 ◽  
Author(s):  
Filiz Karabudak ◽  
Ruhi Yeşildal ◽  
Ebru Emine Şüküroğlu ◽  
Süleyman Şüküroğlu ◽  
Hamid Zamanlou ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Oxidation Process ◽  
Niti Alloy ◽  
Micro Arc Oxidation

Influence of EDTA-2Na Concertration on the Microstructure and Corrosion Behaviors of Mg-Al-Y Alloy

2015 ◽  
Vol 727-728 ◽  
pp. 201-204
Author(s):  
Yun Long Zhang ◽  
Mu Qin Li ◽  
Ping Liao ◽  
Yu Min Zhang
Keyword(s):  
Corrosion Resistance ◽  
Electrolyte Solution ◽  
Oxidation Process ◽  
Corrosion Current ◽  
Positive Potential ◽  
Micro Arc Oxidation ◽  
Corrosion Behaviors ◽  
Oxidation Technology ◽  
Structural Surface ◽  
Polarisation Measurements

In this paper,the micro-arc oxidation technology were utilized to fabricated the oxidation coating in order to resolve the corrosion resistance of the Mg-Al-Y alloy. The EDTA-2Na solution was introduced into the electrolyte solution for improving the coating corrosion properties.After the micro-arc oxidation process, phase structural, surface morphology and corrosion resistance of the MAO coating of Mg-Al-Y alloy were performed by XRD, SEM and Potentiodynamic polarisation measurements. The introduce of EDTA-2Na in the electrolyte solution improve the positive potential and reduced the corrosion current, which would improve the corrosion resistance properties of the Mg-Al-Y alloy.

Improving corrosion resistance of additively manufactured nickel–titanium biomedical devices by micro-arc oxidation process

2019 ◽  
Vol 54 (9) ◽  
pp. 7333-7355 ◽  
Author(s):  
Amir Dehghanghadikolaei ◽  
Hamdy Ibrahim ◽  
Amirhesam Amerinatanzi ◽  
Mahdi Hashemi ◽  
Narges Shayesteh Moghaddam ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Oxidation Process ◽  
Nickel Titanium ◽  
Biomedical Devices ◽  
Micro Arc Oxidation

Effects of Hypophosphate Concentrations on the Characteristics of Micro-Arc Oxidation Coatings Formed on Biomedical NiTi Alloy

2011 ◽  
Vol 314-316 ◽  
pp. 240-244
Author(s):  
Ji Lin Xu ◽  
Jun Ming Luo ◽  
Fu Liu
Keyword(s):  
Surface Roughness ◽  
Corrosion Resistance ◽  
Bonding Strength ◽  
Niti Alloy ◽  
Microarc Oxidation ◽  
X Ray Diffraction ◽  
Micro Arc Oxidation ◽  
Surface Morphologies ◽  
Hank’S Solution ◽  
Better Than

Microarc oxidation coatings on biomedical NiTi alloy were prepared in aluminate electrolytes with and without hypophosphate addition. The effect of hypophosphate concentrations on the characteristics of micro-arc oxidation coatings has been studied. The compositions and surface morphologies of the coatings prepared in different hypophosphate concentrations were determined by energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Surface roughness (Ra) and bonding strength of the coatings were measured by surface roughmeter and a direct pull-off test, respectively. The corrosion resistance of the coatings was evaluated in Hank’s solution using potentiodynamic polarization tests. The results show that all of the coatings exhibit a typical porous surface structure and mainly consist of γ-Al2O3 crystal phase. With increasing the hypophosphate concentrations, the elemental contents of Ni, Ti and P increase while Al decreases; the pore sizes and surface roughness of the coatings decrease firstly, reaching a minimum value at 0.01mol/L, and then increase; at the same time, the bonding strength increases up to 60MPa, and then decreases. The corrosion resistance of the coatings decreases with the increase of the hypophosphate concentrations, but all of the coated samples is better than that of the uncoated NiTi alloy.

The corrosion resistance behavior of Al2O3 coating prepared on NiTi alloy by micro-arc oxidation

2009 ◽  
Vol 472 (1-2) ◽  
pp. 276-280 ◽  
Author(s):  
J.L. Xu ◽  
F. Liu ◽  
F.P. Wang ◽  
D.Z. Yu ◽  
L.C. Zhao
Keyword(s):  
Corrosion Resistance ◽  
Niti Alloy ◽  
Al2o3 Coating ◽  
Micro Arc Oxidation

Study of MB3 Mg Alloy by MAO Process in Different Electrolyte

2012 ◽  
Vol 248 ◽  
pp. 54-59
Author(s):  
Shun Qi Zheng ◽  
Xiao Jing Li ◽  
Li Ping Zhu ◽  
Yun Chen ◽  
Jian Min Luo
Keyword(s):  
Corrosion Resistance ◽  
Oxidation Process ◽  
Salt Spray ◽  
Sample Surface ◽  
Ceramic Coatings ◽  
Salt Spray Test ◽  
Micro Arc Oxidation ◽  
Terminal Voltage ◽  
Energy Disperse Spectroscopy ◽  
Better Than

Micro-arc oxidation (MAO) coatings were synthesized on MB3 magnesium alloy substrate. Two different electrolyte (Ⅰ) and electrolyte (Ⅱ) were adopted, and the performance of ceramic coatings was compared. The morphology feature, phase composition, and chemical composition of the formed coatings were studied by metallographic microscope, scanning electron microscopy (SEM), energy disperse spectroscopy (EDS), XRD, respectively. The corrosion resistance of the coatings was evaluated by salt spray test. The research results show that, the starting and terminal voltage are different during the oxidation process, they are 220V and 375V in the electrolyte (Ⅰ), and 150V and 270 V in electrolyte (Ⅱ). After MAO, The sample surface in electrolyte (Ⅰ) is light gray, and looks tender and smooth. The ceramic coatings obtained in electrolyte (Ⅱ) are relative rough and white in colour. But MAO coatings obtained in electrolyte (Ⅱ) has higher deposition rate. Salt spray test show the corrosion resistance of samples obtained in electrolyte (Ⅱ) are better than those in electrolyte (Ⅰ), which is related to the thickness of the MAO coatings.

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