PLLA封孔工艺对微弧氧化镁合金丝材性能的影响

发布时间：2018-02-27 14:35

本文关键词： 镁合金丝材微弧氧化硅烷偶联聚乳酸封孔浸泡腐蚀降解性能　出处：《表面技术》2017年03期 　论文类型：期刊论文

【摘要】：目的提高微弧氧化镁合金丝材的强度和耐腐蚀性能。方法通过硅烷偶联及聚乳酸封孔处理对微弧氧化AZ31B镁合金丝材进行表面改性,采用扫描电子显微镜(SEM)、电子能谱仪(EDS)以及模拟胃液(SGF)浸泡实验、拉伸实验等设备和方法,研究了硅烷偶联工艺、聚乳酸封孔工艺对丝材综合性能的影响。结果微弧氧化镁合金丝材的耐腐蚀性能随偶联处理时间的延长先升高后降低,当处理时间为90 min时,丝材的耐腐蚀性能最佳。随封孔聚乳酸浓度的升高,丝材的耐腐蚀性能先升高后降低,强度增大;随提拉速度的增大,其耐腐蚀性能和强度均逐渐提高;随浸渍提拉次数的增多,丝材的耐腐蚀性能和强度逐渐降低。当聚乳酸质量浓度为0.14 g/m L、提拉速度为0.9 cm/s、浸渍提拉次数为1次时,硅烷偶联处理过的丝材的综合性能最佳。结论微弧氧化镁合金丝材的性能可以通过聚乳酸封孔处理改善,改善效果与聚乳酸浓度、提拉速度和浸渍提拉次数有关。微弧氧化镁合金丝材表面硅烷偶联处理能有效提高聚乳酸封孔效果。
[Abstract]:Objective to improve the strength and corrosion resistance of microarc magnesium oxide wire. Methods the surface of AZ31B magnesium alloy wire was modified by silane coupling and polylactic acid sealing treatment. The silane coupling process was studied by means of scanning electron microscope (SEM), electron energy spectrometer (EDS) and simulated gastric juice (SGF) immersion test and tensile test. Results the corrosion resistance of microarc magnesium oxide alloy wire first increased and then decreased with the prolongation of coupling treatment time, and when the treatment time was 90 min, the corrosion resistance of microarc magnesium oxide alloy wire increased and then decreased with the prolongation of coupling treatment time. With the increase of the concentration of polylactic acid, the corrosion resistance of the wire first increased and then decreased, and the strength increased, and the corrosion resistance and strength of the wire increased gradually with the increase of the drawing speed. The corrosion resistance and strength of the wire gradually decreased with the increase of dipping times. When the mass concentration of poly (lactic acid) was 0.14 g / mL, the drawing speed was 0.9 cm / s and the number of times of dipping was 1, Conclusion the properties of microarc magnesium oxide alloy wire can be improved by polylactic acid sealing treatment, and the effect and the concentration of polylactic acid can be improved. The coupling treatment of silane on the surface of microarc magnesium oxide alloy wire can effectively improve the sealing effect of polylactic acid.
【作者单位】：东南大学;
【基金】：国家自然科学基金(31570961);国家自然科学基金重点项目(51631003) 江苏省先进金属材料重点实验室项目(BM2007204)~~
【分类号】：TG174.4

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