Title of article :
Surface Characterization and Corrosion Resistance of Biomedical AZ31 Mg Alloy Treated by Microarc Fluorination
Author/Authors :
Sun, Lin Stomatological Materials Laboratory - School of Stomatology - Shandong First Medical University & Shandong Academy of Medical Sciences - Tai’an - Shandong 6, China , Zhao, Bing Cheng Stomatological Materials Laboratory - School of Stomatology - Shandong First Medical University & Shandong Academy of Medical Sciences - Tai’an - Shandong 6, China , Wang, Teng Stomatological Materials Laboratory - School of Stomatology - Shandong First Medical University & Shandong Academy of Medical Sciences - Tai’an - Shandong 6, China , Cui, Jia Yi Stomatological Materials Laboratory - School of Stomatology - Shandong First Medical University & Shandong Academy of Medical Sciences - Tai’an - Shandong 6, China , Zhang, ShuXin Stomatological Materials Laboratory - School of Stomatology - Shandong First Medical University & Shandong Academy of Medical Sciences - Tai’an - Shandong 6, China , Li, Feng Stomatological Materials Laboratory - School of Stomatology - Shandong First Medical University & Shandong Academy of Medical Sciences - Tai’an - Shandong 6, China , Cai, HongXin Stomatological Materials Laboratory - School of Stomatology - Shandong First Medical University & Shandong Academy of Medical Sciences - Tai’an - Shandong 6, China , iang, Heng Bo J Stomatological Materials Laboratory - School of Stomatology - Shandong First Medical University & Shandong Academy of Medical Sciences - Tai’an - Shandong 6, China , Zhang, Qianqian Shandong Liming Institute of Technology and Vocational College - Tai’an - Shandong , China , Lee, Eui-Seok Department of Oral and Maxillofacial Surgery - Graduate School of Clinical Dentistry - Korea University - Seoul , Republic of Korea
Abstract :
The application prospect of biodegradable materials is being studied extensively. However, the high corrosion rate and its alloys inbodyfluids have been major limitations of the application of pure Mg (magnesium). To improve corrosion resistance ofbiodegradable AZ31 Mg alloy, we adopted microarcfluorination within a voltage range of 100-300 V in 46% hydrofluoric acid.To obtain morphologies, chemical compositions, and structural characteristics,field-emission scanning electron microscopy(FE-SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) were performed, respectively. Resultsshowed that the coating was mainly composed of MgF2. Electrochemical corrosion and immersion tests proved that thecorrosion resistance of MAF-treated AZ31 Mg alloy was significantly improved compared with untreated AZ31 Mg alloy inHBSS (Hank’s Balanced Salt Solution). Current densities of AZ31, MAF100, MAF150, MAF200, MAF250, and MAF300 were342.4, 0.295, 0.228, 0.177, 0.199, and 0.212μA/cm2, respectively. The roughness test indicated that samples under MAFtreatment of 200 V, 250 V, and 300 V had large surface roughness. Meanwhile, the contact angle measurement and surface freeenergy test suggested that those samples had smaller contact angle and higher SFE than Ti. Thus, MAF-treated AZ31 Mg alloymight have promising application in variousfields.
Keywords :
Surface Characterization , Corrosion Resistance , Biomedical AZ31 Mg Alloy Treated , Microarc Fluorination , XRD , EDS
