轧制对Mg-Al-Pb-La镁合金腐蚀电化学行为的影响
发布时间：2018-09-08 21:29
【摘要】：采用熔炼铸造和塑性变形方法制备Mg-Al-Pb-La镁合金。采用扫描电镜和X射线衍射等方法研究轧制对Mg-Al-Pb-La镁合金显微组织的影响,采用动电位极化和恒电流放电等方法研究轧制对Mg-Al-Pb-La镁合金腐蚀电化学行为的影响。结果表明:轧制使Mg-Al-Pb-La镁合金的晶粒细化、第二相破碎、再结晶程度降低、Mg-Al-Pb-La镁合金的放电活性增强、耐蚀性变差和阳极效率降低;当轧制变形量为40%时,镁合金的综合放电性能优良,在电流密度180 m A/cm~2下平均放电电位和阳极效率分别为-1.749 V(vs SCE)和(82.9±0.2)%。
[Abstract]:Mg-Al-Pb-La magnesium alloys were prepared by melting casting and plastic deformation. The effect of rolling on the microstructure of Mg-Al-Pb-La magnesium alloy was studied by means of scanning electron microscope (SEM) and X-ray diffraction (XRD). The effect of rolling on corrosion electrochemical behavior of Mg-Al-Pb-La magnesium alloy was studied by means of potentiodynamic polarization and constant current discharge. The results show that the grain size of Mg-Al-Pb-La magnesium alloy is refined, the second phase is broken, the degree of recrystallization is decreased, the discharge activity of Mg-Al-Pb-La magnesium alloy is decreased, the corrosion resistance of Mg-Al-Pb-La magnesium alloy is improved, and the anode efficiency is decreased when the rolling deformation is 40%. The average discharge potential and anodic efficiency at the current density of 180m A/cm~2 are -1.749 V (vs SCE) and (82.9 卤0.2), respectively.
【作者单位】： 中南大学材料科学与工程学院;
【基金】：湖南省自然科学基金资助项目(2016JJ2147)~~
【分类号】：TG178;TG339
，
本文编号：2231753
[Abstract]:Mg-Al-Pb-La magnesium alloys were prepared by melting casting and plastic deformation. The effect of rolling on the microstructure of Mg-Al-Pb-La magnesium alloy was studied by means of scanning electron microscope (SEM) and X-ray diffraction (XRD). The effect of rolling on corrosion electrochemical behavior of Mg-Al-Pb-La magnesium alloy was studied by means of potentiodynamic polarization and constant current discharge. The results show that the grain size of Mg-Al-Pb-La magnesium alloy is refined, the second phase is broken, the degree of recrystallization is decreased, the discharge activity of Mg-Al-Pb-La magnesium alloy is decreased, the corrosion resistance of Mg-Al-Pb-La magnesium alloy is improved, and the anode efficiency is decreased when the rolling deformation is 40%. The average discharge potential and anodic efficiency at the current density of 180m A/cm~2 are -1.749 V (vs SCE) and (82.9 卤0.2), respectively.
【作者单位】： 中南大学材料科学与工程学院;
【基金】：湖南省自然科学基金资助项目(2016JJ2147)~~
【分类号】：TG178;TG339
，
本文编号：2231753
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2231753.html
