Enhanced corrosion resistance and biocompatibility of polydopamine/dicalcium phosphate dihydrate/collagen composite coating on magnesium alloy for orthopedic applications

2020 ◽  
Vol 817 ◽  
pp. 152782 ◽  
Author(s):  
Yunting Guo ◽  
Siqi Jia ◽  
Lu Qiao ◽  
Yingchao Su ◽  
Rui Gu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Composite Coating ◽  
Dicalcium Phosphate ◽  
Dicalcium Phosphate Dihydrate ◽  
Phosphate Dihydrate ◽  
Orthopedic Applications

Preparation and Characterisation of CaP-Containing Coating on Magnesium Alloy by Micro-Arc Oxidation and Hydrothermal Treatment

2012 ◽  
Vol 496 ◽  
pp. 383-386
Author(s):  
Li Min Chang ◽  
Dan Dan Xu ◽  
Wei Liu
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Oxide Film ◽  
Hydrothermal Treatment ◽  
Electrochemical Methods ◽  
Dicalcium Phosphate ◽  
Dicalcium Phosphate Dihydrate ◽  
Phosphate Dihydrate ◽  
Micro Arc Oxidation ◽  
Hank’S Solution

Micro-arc oxidation (MAO) together with hydrothermal treatment had been performed to improve the corrosion resistance of magnesium alloy. The oxide films were hydrothermally heated at 150°C for 2h. The morphology of samples were characterized by SEM/EDS. The phase compositions were examined by TF-XRD. The corrosion resistance of the coatings was evaluated by electrochemical methods in Hank’s solution. The MAO films displayed porous and rough structure and were mainly composed of MgO and MgAl2O4. After hydrothermal treatment, a dicalcium phosphate dihydrate (DCPD) coating formed on the oxide film. The corrosion resistance of the MAO film and DCPD coating was increased by about 12 and 40 times higher than that of bare magnesium alloy.

scholarly journals Evolution of the dicalcium phosphate-dihydrate (DCPD) coating created by large amplitude sinusoidal voltammetry (LASV) on corrosion resistance of the ZW3 magnesium alloy in chloride containing environment

2018 ◽  
Vol 62 (1) ◽  
pp. 14-18
Author(s):  
D. Kajánek ◽  
B. Hadzima ◽  
F. Pastorek ◽  
M. Neslušan Jacková
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Large Amplitude ◽  
Electrochemical Impedance ◽  
Dicalcium Phosphate ◽  
Electrochemical Characteristics ◽  
Dicalcium Phosphate Dihydrate ◽  
Electro Deposition ◽  
Cathodic Electrodeposition ◽  
Phosphate Dihydrate

Abstract The contribution is focused on the preparation of coating based on the dicalcium phosphate-dihydrate (DCPD) on the surface of ZW3 magnesium alloy. For the preparation of the coating a cathodic electrodeposition technique called Large Amplitude Sinusoidal Voltammetry (LASV) was used. The DCPD layer was prepared at the temperature of 22 ± 2 °C in electrolyte composed of 0.1M Ca(NO3).4H2O, 0.06 M NH4H2PO4 and H2O2. Electrochemical characteristics were evaluated by electrochemical impedance spectroscopy (EIS) in 0.1M NaCl solution. The obtained data in form of Nyquist plots were analysed by the equivalent circuit method. It is clear from the measured values of polarization resistance Rp that dicalcium phosphate-dihydrate (DCPD) layer prepared by LASV electro-deposition technique improved corrosion resistance of ZW3 alloy in the chosen environment.

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