The Conversationalist Club, School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an, Shandong 271016, China.
Department of Oral and Maxillofacial Surgery, Graduate School of Clinical Dentistry, Korea University, Seoul 02841, Republic of Korea.
Scanning. 2021 May 3;2021:5530788. doi: 10.1155/2021/5530788. eCollection 2021.
Coating treatment plays an irreplaceable role in propelling the clinical application of magnesium alloys. This experiment was designed in order to observe the anticorrosion behavior of magnesium fluoride coating in rats. The MgF layer was prepared on the surface of AZ31 magnesium alloy in saturated NHHF solution by microarc fluorination (MAF) at 190 V. The cross-sectional SEM, EDS, and XRD analysis indicated that the alloy surface was covered with MgF. Meanwhile, SEM observation was used to compare the magnesium alloy samples before and after treatment, and it was found that the samples after coating were flatter and smoother. Two sets of experiments were carried out with the subjects, 6-week-old male rats. So that the untreated AZ31 samples and the microarc fluorinated AZ31 samples could be buried under the muscle layer individually. The volume changes and surface morphology of the corroded samples were monitored dynamically using micro-CT over a 16-week period . Comparison of results between the two sets of samples presented that the corrosion of the microarc fluoridated samples was much slower than that of the untreated ones. The MAF coating was shown to be effective in controlling the corrosion rate and progression of the magnesium alloy.
涂层处理在推动镁合金的临床应用方面起着不可替代的作用。本实验旨在观察氟化镁涂层在大鼠体内的耐腐蚀行为。通过在 190V 的饱和 NH4HF2 溶液中进行微弧氟化（MAF），在 AZ31 镁合金表面制备了 MgF 层。横截面 SEM、EDS 和 XRD 分析表明，合金表面覆盖着 MgF。同时，通过 SEM 观察比较了处理前后的镁合金样品，发现涂层后的样品更平整、更光滑。用两组实验对象，6 周龄雄性大鼠进行实验。使未经处理的 AZ31 样品和微弧氟化的 AZ31 样品可以分别埋在肌肉层下。使用微 CT 在 16 周的时间内动态监测腐蚀样品的体积变化和表面形态。两组样品的结果比较表明，微弧氟化样品的腐蚀速度明显比未处理样品慢。MAF 涂层在控制镁合金的腐蚀速率和进程方面是有效的。
