Double Sealing of Ultrasonic Micro-Arc Oxidation Coating on Pure Magnesium by Nano-SiO2 Particles and SiO2 Sol Sealing Agent

Wei Wei Sun; Mu Qin Li; Yan Gao; Jiang Liu

doi:10.4028/www.scientific.net/AMR.1030-1032.48

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1030-1032Double Sealing of Ultrasonic Micro-Arc Oxidation...

Double Sealing of Ultrasonic Micro-Arc Oxidation Coating on Pure Magnesium by Nano-SiO₂ Particles and SiO₂ Sol Sealing Agent

Abstract:

A double sealing coating was prepared on ultrasonic micro-arc oxidized pure magnesium substrate by adding nano-SiO2 particles as additive in the plating solution and coating SiO2 sol as sealing agent. The bonding characters of SiO2 sol was analyzed by Fourier transformed infrared spectrometry (FTIR). The compositions and morphology of seal coating were characterized by energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM), respectively. The corrosion resistance of the micro-arc oxidized and the sealed pure magnesium substrate were studied. The results showed that the Si content increased gradually with the addition of nano-SiO2 particles and the SiO2 sol sealing. It was benefit to create bioactive MgSiO3, which promoted the bone growth. The double sealed pure magnesium had a self-corrosion potential shifted positively by 60mV as well as a self-corrosion current density decreased by a half in a 3.5wt% NaCl solution, showing good corrosion resistance.

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Periodical:

Advanced Materials Research (Volumes 1030-1032)

Pages:

48-51

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1030-1032.48

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Online since:

September 2014

Authors:

Wei Wei Sun, Mu Qin Li*, Yan Gao, Jiang Liu

Keywords:

Nano-SiO₂ Particle, Pure Magnesium, SiO₂ Sol-Gel Seal, Ultrasonic-Micro-Arc Oxidation

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