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
目的制备、纯化并鉴定兔抗阴道毛滴虫重组蛋白AP65的多克隆抗体。方法日本大耳兔多次免疫重组蛋白AP65,间接ELISA法检测抗体效价,用饱和硫酸铵法和n protein A sepharose 4FF柱纯化多克隆抗体,Western blot检测免疫反应性。结果第3次加...目的制备、纯化并鉴定兔抗阴道毛滴虫重组蛋白AP65的多克隆抗体。方法日本大耳兔多次免疫重组蛋白AP65,间接ELISA法检测抗体效价,用饱和硫酸铵法和n protein A sepharose 4FF柱纯化多克隆抗体,Western blot检测免疫反应性。结果第3次加强免疫后,间接ELISA法检测血清效价达到1∶25600,用硫酸铵法纯化多克隆抗体纯度为56%,而后采用亲合层析柱n protein A sepharose 4FF再次纯化,纯度达到80%。Western blot鉴定兔抗重组蛋白AP65多克隆抗体能识别重组蛋白AP65。结论成功制备了高效价、高纯度的抗阴道毛滴虫重组蛋白AP65多克隆抗体。展开更多
利用扫描电镜(SEM)、X射线衍射(XRD)等检测分析稀土元素La对Mg-6%Al-5%Pb(AP65)镁合金(质量分数)显微组织的影响,并采用恒电流法、动电位极化扫描法和析氢法研究La含量对AP65镁合金的腐蚀电化学性能的影响。结果表明:加入La能够使AP65...利用扫描电镜(SEM)、X射线衍射(XRD)等检测分析稀土元素La对Mg-6%Al-5%Pb(AP65)镁合金(质量分数)显微组织的影响,并采用恒电流法、动电位极化扫描法和析氢法研究La含量对AP65镁合金的腐蚀电化学性能的影响。结果表明:加入La能够使AP65镁合金α-Mg组织得到细化,生成针状稀土相Mg80(Al,La)17和块状稀土相Mg17(Al,La)12;添加La提高了AP65镁合金的电化学活性、耐腐蚀性能和阳极效率,使AP65的平均电位负移;当La含量为2%(质量分数)时,平均电位最负为-1.73 V(vs SCE)。添加6%La使AP65镁合金的平均析氢速率从1.75 m L/(cm2·h)下降到0.02 m L/(cm2·h),并且使阳极效率从74.30%上升到82.31%。展开更多
Mg-6%Al,Mg-5%Pb and Mg-6%Al-5%Pb (mass fraction)alloys were prepared by induction melting with the protection of argon atmosphere.Their electrochemical activations in different electrolyte solutions were investigated ...Mg-6%Al,Mg-5%Pb and Mg-6%Al-5%Pb (mass fraction)alloys were prepared by induction melting with the protection of argon atmosphere.Their electrochemical activations in different electrolyte solutions were investigated by galvanostatic test.The microstructures of these alloys and their corroded surfaces were studied by scanning electron microscopy,X-ray diffractometry and emission spectrum analysis.The results show that the activation of magnesium is not prominent when only aluminum or lead exists in the magnesium matrix,but the coexistence of the two elements can increase the activation.The activation mechanism of Mg-Al-Pb alloy is dissolving-reprecipitating and there is a synergistic effect between aluminium and lead:the precipitated lead oxides on the surface of the alloy can facilitate the precipitation of Al(OH)3,which can peel the Mg(OH)2 film in the form of 2Mg(OH)2·Al(OH)3 and activate the magnesium matrix.展开更多
Mg-6%Al-5%Pb and Mg-6%Al-5%Pb-0.55%Zn-0.22%Mn(mass fraction) alloys were prepared by induction melting with the protection of argon.The corrosion behaviors of these alloys were studied by electrochemical measurements ...Mg-6%Al-5%Pb and Mg-6%Al-5%Pb-0.55%Zn-0.22%Mn(mass fraction) alloys were prepared by induction melting with the protection of argon.The corrosion behaviors of these alloys were studied by electrochemical measurements and immersion tests.The results show that at the corrosion onset of Mg-Al-Pb anode there is an incubation period that can be shortened with 0.55%Zn and 0.22%Mn additions in the magnesium matrix.The corrosion rate of Mg-Al-Pb anode is mainly determined by the incubation period.Short incubation period always leads to high corrosion rate while long incubation period leads to low corrosion rate.The corrosion rates based on the corrosion current density by the electrochemical measurements do not agree with the measurements evaluated from the evolved hydrogen volume.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。
文摘目的制备、纯化并鉴定兔抗阴道毛滴虫重组蛋白AP65的多克隆抗体。方法日本大耳兔多次免疫重组蛋白AP65,间接ELISA法检测抗体效价,用饱和硫酸铵法和n protein A sepharose 4FF柱纯化多克隆抗体,Western blot检测免疫反应性。结果第3次加强免疫后,间接ELISA法检测血清效价达到1∶25600,用硫酸铵法纯化多克隆抗体纯度为56%,而后采用亲合层析柱n protein A sepharose 4FF再次纯化,纯度达到80%。Western blot鉴定兔抗重组蛋白AP65多克隆抗体能识别重组蛋白AP65。结论成功制备了高效价、高纯度的抗阴道毛滴虫重组蛋白AP65多克隆抗体。
文摘利用扫描电镜(SEM)、X射线衍射(XRD)等检测分析稀土元素La对Mg-6%Al-5%Pb(AP65)镁合金(质量分数)显微组织的影响,并采用恒电流法、动电位极化扫描法和析氢法研究La含量对AP65镁合金的腐蚀电化学性能的影响。结果表明:加入La能够使AP65镁合金α-Mg组织得到细化,生成针状稀土相Mg80(Al,La)17和块状稀土相Mg17(Al,La)12;添加La提高了AP65镁合金的电化学活性、耐腐蚀性能和阳极效率,使AP65的平均电位负移;当La含量为2%(质量分数)时,平均电位最负为-1.73 V(vs SCE)。添加6%La使AP65镁合金的平均析氢速率从1.75 m L/(cm2·h)下降到0.02 m L/(cm2·h),并且使阳极效率从74.30%上升到82.31%。
文摘Mg-6%Al,Mg-5%Pb and Mg-6%Al-5%Pb (mass fraction)alloys were prepared by induction melting with the protection of argon atmosphere.Their electrochemical activations in different electrolyte solutions were investigated by galvanostatic test.The microstructures of these alloys and their corroded surfaces were studied by scanning electron microscopy,X-ray diffractometry and emission spectrum analysis.The results show that the activation of magnesium is not prominent when only aluminum or lead exists in the magnesium matrix,but the coexistence of the two elements can increase the activation.The activation mechanism of Mg-Al-Pb alloy is dissolving-reprecipitating and there is a synergistic effect between aluminium and lead:the precipitated lead oxides on the surface of the alloy can facilitate the precipitation of Al(OH)3,which can peel the Mg(OH)2 film in the form of 2Mg(OH)2·Al(OH)3 and activate the magnesium matrix.
基金Project(JPPT-115-168) supported by National Key Science and Technological Project of China
文摘Mg-6%Al-5%Pb and Mg-6%Al-5%Pb-0.55%Zn-0.22%Mn(mass fraction) alloys were prepared by induction melting with the protection of argon.The corrosion behaviors of these alloys were studied by electrochemical measurements and immersion tests.The results show that at the corrosion onset of Mg-Al-Pb anode there is an incubation period that can be shortened with 0.55%Zn and 0.22%Mn additions in the magnesium matrix.The corrosion rate of Mg-Al-Pb anode is mainly determined by the incubation period.Short incubation period always leads to high corrosion rate while long incubation period leads to low corrosion rate.The corrosion rates based on the corrosion current density by the electrochemical measurements do not agree with the measurements evaluated from the evolved hydrogen volume.
