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However, the high corrosion rate and its alloys in body fluids have been major limitations of the application of pure Mg (magnesium). To improve corrosion resistance of biodegradable AZ31 Mg alloy, we adopted microarc fluorination within a voltage range of 100-300\u2009V 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. Results showed that the coating was mainly composed of MgF2. Electrochemical corrosion and immersion tests proved that the corrosion resistance of MAF-treated AZ31 Mg alloy was significantly improved compared with untreated AZ31 Mg alloy in HBSS (Hank\u2019s Balanced Salt Solution). Current densities of AZ31, MAF100, MAF150, MAF200, MAF250, and MAF300 were 342.4, 0.295, 0.228, 0.177, 0.199, and 0.212\u2009\u03bcA\/cm2, respectively. The roughness test indicated that samples under MAF treatment of 200\u2009V, 250\u2009V, and 300\u2009V had large surface roughness. Meanwhile, the contact angle measurement and surface free energy test suggested that those samples had smaller contact angle and higher SFE than Ti. Thus, MAF-treated AZ31 Mg alloy might have promising application in various fields.<\/jats:p>","DOI":"10.1155\/2020\/5936789","type":"journal-article","created":{"date-parts":[[2020,10,28]],"date-time":"2020-10-28T17:20:08Z","timestamp":1603905608000},"page":"1-15","source":"Crossref","is-referenced-by-count":10,"title":["Surface Characterization and Corrosion Resistance of Biomedical AZ31 Mg Alloy Treated by Microarc Fluorination"],"prefix":"10.1155","volume":"2020","author":[{"given":"Lin","family":"Sun","sequence":"first","affiliation":[{"name":"Stomatological Materials Laboratory, School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai\u2019an, Shandong 271016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bing Cheng","family":"Zhao","sequence":"additional","affiliation":[{"name":"Stomatological Materials Laboratory, School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, 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