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Effect of fluoride treatment on corrosion property of AZ31 magnesium alloy in Hank's solution

机译：氟化物处理对Hank溶液中AZ31镁合金腐蚀性能的影响

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In order to improve the corrosion resistance of Mg alloys in applications as degradable implant material. Fluoride conversion coating was synthesized on Mg alloy AZ31 by immersion in hydrofluoric acid (HF) with various concentrations. The effect of hydrofluoric acid (HF) treatment on the corrosion behavior of the Mg alloy AZ31 was investigated by potentiodynamic electrochemical technique and immersion tests. The XRD analysis indicated the fluoride conversion coating was amorphous, with smooth and compact surface. Electrochemical and immersion tests proved that the fluoride conversion coatings significantly improved the corrosion resistance of AZ31. The most improved corrosion protection was achieved using the concentrations of 40 % and 72 h of treatment time, resulting in corrosion rates 20 times lower than those of untreated samples, showing that fluoride coating by conversion treatment is a simple and promising way of enhancing the corrosion resistance of Mg in Hanks' solution.
机译：为了提高镁合金在应用中的耐可降解植入物材料中的耐腐蚀性。氟化物转化涂层通过浸入具有各种浓度的氢氟酸（HF）上合成Mg合金AZ31。通过电位电化学技术和浸入试验研究了氢氟酸（HF）处理对Mg合金AZ31的腐蚀行为的影响。 XRD分析表明氟化物转化涂层是无定形的，表面光滑且紧凑。电化学和浸渍试验证明了氟化物转化涂层显着提高了AZ31的耐腐蚀性。使用40％和72小时的治疗时间浓度实现了最改善的腐蚀保护，导致腐蚀速率低于未处理样品的腐蚀速率20倍，表明通过转化处理氟化物涂层是一种简单而有希望的增强腐蚀的方式Mg抗汉语溶液的抗性。

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