Improving the corrosion resistance and biocompatibility of magnesium alloy via composite coatings of calcium phosphate/carbonate induced by silane

2022 ◽  
Vol 163 ◽  
pp. 106653
Author(s):  
Tianxiao Wang ◽  
Siqi Jia ◽  
Yingchao Xu ◽  
Yunqian Dong ◽  
Yunting Guo ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Calcium Phosphate ◽  
Composite Coatings ◽  
Phosphate Carbonate

Al–AlN composite coatings on AZ31 magnesium alloy for surface hardening and corrosion resistance

Vacuum ◽  
2021 ◽  
pp. 110146
Author(s):  
Wenling Xie ◽  
Yiman Zhao ◽  
Bin Liao ◽  
Pan Pang ◽  
Dongsing Wuu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Surface Hardening ◽  
Composite Coatings ◽  
Az31 Magnesium Alloy

Electrodeposition of MgO/Calcium Phosphate Composite Coatings on Titanium for Biomedical Applications

2013 ◽  
Vol 785-786 ◽  
pp. 872-876
Author(s):  
Yong Huang ◽  
Shu Guang Han ◽  
Ya Jing Yan ◽  
Xiao Feng Pang
Keyword(s):  
Corrosion Resistance ◽  
Phase Composition ◽  
Calcium Phosphate ◽  
Biomedical Applications ◽  
Lower Layer ◽  
Composite Coatings ◽  
Polarization Test ◽  
Coated Surface ◽  
Bare Titanium ◽  
Superior Corrosion Resistance

This work elucidated corrosion resistance of the electrodeposited MgO/calcium phosphate (Ca-P/MgO) films on titanium (Ti). The microstructure, phase composition, and corrosion resistance of the films were studied. Results revealed that The Ca-P/MgO composite coatings were rough and inhomogeneous, the upper layer was floral-like crystals or flakes agglomerates morphology, and the lower layer was needle-like crystals which were mutually cross linked. The coating was very dense, and the content of Mg was about 0.3 wt%. Potentiodynamic polarization test manifested that the Ca-P/MgO-coated surface exhibited superior corrosion resistance than the bare titanium.

Laser Cladding of Zr55Al10Ni5Cu30/SiC Amorphous Composite Coatings on AZ91D Magnesium Alloy for Improvement of Corrosion Resistance

2011 ◽  
Vol 179-180 ◽  
pp. 757-761 ◽  
Author(s):  
Kai Jin Huang ◽  
Hou Guang Liu ◽  
Chang Rong Zhou
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Laser Cladding ◽  
Composite Coatings ◽  
Corrosion Property ◽  
Nacl Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Good Corrosion Resistance ◽  
Az91d Magnesium Alloy

To improve the corrosion property of magnesium alloys, Zr-based amorphous composite coatings have been fabricated on AZ91D magnesium alloy by laser cladding using mixed powders Zr55Al10Ni5Cu30/SiC. The microstructure of the coating was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The corrosion resistance of the coatings was tested in 3.5wt.% NaCl solution. The results show that the coatings mainly consist of amorphous and different crystalline phases. The coatings compared with AZ91D magnesium alloy exhibit good corrosion resistance because of the presence of the amorphous phase in the coatings.

Enhancing the corrosion resistance and surface bioactivity of a calcium-phosphate coating on a biodegradable AZ60 magnesium alloy via a simple fluorine post-treatment method

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 56001-56010 ◽  
Author(s):  
Yingchao Su ◽  
Yanbo Lu ◽  
Yichang Su ◽  
Jiangjiang Hu ◽  
Jianshe Lian ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Calcium Phosphate ◽  
Treatment Method ◽  
Post Treatment ◽  
Calcium Phosphate Coating ◽  
Phosphate Coating

A simple fluorine post-treatment was attempted on a calcium-phosphate coating on an AZ60 alloy. Optimum fluorine post-treatment parameters were obtained. The fluorine post-treated coating showed improved corrosion protectiveness and surface bioactivity.

Enhancing Conductivity and Corrosion Resistance by Organic Coatings on AZ31 Magnesium Alloy Treated by Micro-Arc Oxidation

2019 ◽  
Author(s):  
Xiuping Zhang ◽  
Lei Li ◽  
Yaozhao Mu ◽  
Yanxiang Xie ◽  
Jun Dai ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Carbon Black ◽  
Composite Coatings ◽  
Electrochemical Corrosion ◽  
Organic Coating ◽  
Organic Coatings ◽  
Micro Arc Oxidation ◽  
Conductive Particles

Abstract In this study, an organic coating, in combination of a micro-arc oxidation ceramic layer, was prepared on the surface of a magnesium alloy (AZ31) to achieve both functions of corrosion resistance and electrical conductivity. By using carbon black as conductive particles and epoxy resin as matrix, organic coatings of various weight fractions were applied on the AZ31 surface treated by micro-arc oxidation through adjusting the contents of the conductive particles and non-conductive matrix. Electrical conductivity and corrosion resistance of organic coatings were measured. The results show that the organic coatings can improve the electrical conductivity of the AZ31 material treated by micro-arc oxidation, and the conductivity changes with the ratio between the carbon black particles and non-conductive matrix. The smallest resistance value of the organic coatings reached 130Ω. Also, the organic coating can further improve the corrosion resistance of the AZ31 material. The electrochemical corrosion tests show that the corrosion potential of the AZ31 material with composite coatings was at least 0.6V higher than that of AZ31 only with micro-arc oxidation treatment.

Effect of Crystalline Calcium Phosphate Coatings Prepared in an Aqueous Solution on Corrosion Resistance of Bioabsorbable Magnesium Alloy

2018 ◽  
Vol 782 ◽  
pp. 158-164
Author(s):  
Shin Watanabe ◽  
Takeshi Yabutsuka ◽  
Shigeomi Takai
Keyword(s):  
Aqueous Solution ◽  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Calcium Phosphate ◽  
Mg Alloy ◽  
High Corrosion Resistance ◽  
Phosphate Coatings ◽  
Naoh Solution ◽  
Biological Environment ◽  
Calcium Phosphate Coatings

Bioabsorbable magnesium (Mg) alloy was anodized in 1.0 M NaOH solution. Then the anodized Mg alloy was immersed in an aqueous solution with three times concentration of Ca2+and HPO42-in comparison with those of biological environment to improve its corrosion resistance. The whole surface of Mg alloy was successfully coated with crystalline calcium phosphate (CaP) within 1 day. The CaP coated Mg alloys showed high corrosion resistance in SBF.

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