经熔炼、均匀化处理制备了Mg-6%Al-5%Pb-Zn镁阳极材料。采用浸泡法、恒电流极化法和动电位扫描法研究不同Zn含量对AP65镁阳极腐蚀速率的影响。结果表明:添加Zn元素后,AP65镁阳极激活时间变短、电化学活性增强、自腐蚀速率增大。APZ1.5...经熔炼、均匀化处理制备了Mg-6%Al-5%Pb-Zn镁阳极材料。采用浸泡法、恒电流极化法和动电位扫描法研究不同Zn含量对AP65镁阳极腐蚀速率的影响。结果表明:添加Zn元素后,AP65镁阳极激活时间变短、电化学活性增强、自腐蚀速率增大。APZ1.5阳极的腐蚀电流密度为0.020 m A/cm2。APZ1.0合金开路电位达-1.643 V(vs SCE),腐蚀电流密度为0.018 m A/cm2,具有相对较好的综合性能。Zn元素的加入使AP65镁阳极开路电位发生明显改变,但正向或负向移动趋势与Zn元素含量并不成线性对应关系。展开更多
The effect of indium addition on the corrosion behavior of AP65 Mg alloy was examined. The indium modified AP65 exhibits accelerated pitting corrosion and overall corrosion, but there is almost no incubation period at...The effect of indium addition on the corrosion behavior of AP65 Mg alloy was examined. The indium modified AP65 exhibits accelerated pitting corrosion and overall corrosion, but there is almost no incubation period at the onset of corrosion. Polarization curve measurements indicate that the indium modified AP65 has more negative corrosion potential, which is an improvement aspect of the electrochemical activation. The corrosion current density increases from 0.126 to 0.868 mA/cm2 with and without 2.0% (mass fraction) indium addition. The mean potentials of AP65 negatively shift from -1.491 V to -1.584 V by adding 2.0% indium. The effect of indium addition on the corrosion performance of AP65 seems to be associated with the decrease of cathode-to-anode area ratio of the alloy, which may change the electrochemical anode and cathode polarization behavior of the alloy.展开更多
文摘经熔炼、均匀化处理制备了Mg-6%Al-5%Pb-Zn镁阳极材料。采用浸泡法、恒电流极化法和动电位扫描法研究不同Zn含量对AP65镁阳极腐蚀速率的影响。结果表明:添加Zn元素后,AP65镁阳极激活时间变短、电化学活性增强、自腐蚀速率增大。APZ1.5阳极的腐蚀电流密度为0.020 m A/cm2。APZ1.0合金开路电位达-1.643 V(vs SCE),腐蚀电流密度为0.018 m A/cm2,具有相对较好的综合性能。Zn元素的加入使AP65镁阳极开路电位发生明显改变,但正向或负向移动趋势与Zn元素含量并不成线性对应关系。
基金Project(JPPT-115-168) supported by the National Key Science and Technology Program of ChinaProject(51101171) supported by the National Natural Science Foundation of China
文摘The effect of indium addition on the corrosion behavior of AP65 Mg alloy was examined. The indium modified AP65 exhibits accelerated pitting corrosion and overall corrosion, but there is almost no incubation period at the onset of corrosion. Polarization curve measurements indicate that the indium modified AP65 has more negative corrosion potential, which is an improvement aspect of the electrochemical activation. The corrosion current density increases from 0.126 to 0.868 mA/cm2 with and without 2.0% (mass fraction) indium addition. The mean potentials of AP65 negatively shift from -1.491 V to -1.584 V by adding 2.0% indium. The effect of indium addition on the corrosion performance of AP65 seems to be associated with the decrease of cathode-to-anode area ratio of the alloy, which may change the electrochemical anode and cathode polarization behavior of the alloy.
