利用线性电位扫描、恒电位阶跃、交流阻抗等方法分别研究了Pb Ca Bi合金被阳极或阴极极化后,表面上析氧、析氢以及合金腐蚀行为。结果表明:与Pb Ca合金相比,Pb Ca Bi合金可增加氧的析出,但抑制氢的析出,同时铋的加入,使Pb Ca耐蚀性提高...利用线性电位扫描、恒电位阶跃、交流阻抗等方法分别研究了Pb Ca Bi合金被阳极或阴极极化后,表面上析氧、析氢以及合金腐蚀行为。结果表明:与Pb Ca合金相比,Pb Ca Bi合金可增加氧的析出,但抑制氢的析出,同时铋的加入,使Pb Ca耐蚀性提高,且不同含量的铋对合金腐蚀有不同的影响。展开更多
The effect of Ce on the behavior of gas evolution on Pb-Ca-Sn alloy in 4.5 mol·L^-1 H2SO4 was investigated using cyclic voltammetry （CV）, cathodic polarization curves and AC impedance （EIS）. Cyclic voltammetr...The effect of Ce on the behavior of gas evolution on Pb-Ca-Sn alloy in 4.5 mol·L^-1 H2SO4 was investigated using cyclic voltammetry （CV）, cathodic polarization curves and AC impedance （EIS）. Cyclic voltammetry experiments show that the current of oxygen evolution on Pb-Ca-Sn-Ce electrode is lower than that of Pb-Ca-Sn electrode in the same anodic voltage. Moreover, the oxygen evolution potential on the former electrode is greater than that on the latter, and this means that Ce can increase the potential of oxygen evolution on Pb-Ca-Sn alloy. The AC impedance experiments show that Ce can also enhance the resistance of hydrogen evolution on Pb-Ca-Sn electrode, i.e., Ce can inhibit the hydrogen evolution on Pb-Ca-Sn electrode. The reason why Ce decreases the volume of hydrogen evolution on Pb-Ca-Sn alloy is that Ce increases the resistance of absorbing step of hydrogen evolution reaction. All the experimental results indicate that Pb-Ca-Sn-Ce alloy can rapidly decrease the oxygen and hydrogen evolution on Pb-Ca-Sn-Ce alloy. It is concluded that Pb-Ca-Sn-Ce alloy can promote the maintenance-free property of lead acid battery, and can serve as the candidate of the grid material for maintenance-free lead acid battery.展开更多
A Pb-0.08Ca-2Sn alloy was subjected to rolling at room temperature to different final thicknesses.Annealing treatments at temperature ranging from 80 to 120 °C led to recrystallization of the samples as shown by ...A Pb-0.08Ca-2Sn alloy was subjected to rolling at room temperature to different final thicknesses.Annealing treatments at temperature ranging from 80 to 120 °C led to recrystallization of the samples as shown by resistivity and micro-hardness measurements.The deformation texture determined through X-ray diffraction is qualitatively the Brass type.The measured Lankford anisotropy parameter R and its evolution are close to the determined one using a self consistent approach.The R value evolution with angle to rolling direction shows the presence of planar anisotropy and poor drawability.The recrystallization in annealing at 80-120 °C is achieved within time period up to 3×104 s.The recrystallization texture is a retained deformation texture with an emerging Cube component.展开更多
文摘The effect of Ce on the behavior of gas evolution on Pb-Ca-Sn alloy in 4.5 mol·L^-1 H2SO4 was investigated using cyclic voltammetry （CV）, cathodic polarization curves and AC impedance （EIS）. Cyclic voltammetry experiments show that the current of oxygen evolution on Pb-Ca-Sn-Ce electrode is lower than that of Pb-Ca-Sn electrode in the same anodic voltage. Moreover, the oxygen evolution potential on the former electrode is greater than that on the latter, and this means that Ce can increase the potential of oxygen evolution on Pb-Ca-Sn alloy. The AC impedance experiments show that Ce can also enhance the resistance of hydrogen evolution on Pb-Ca-Sn electrode, i.e., Ce can inhibit the hydrogen evolution on Pb-Ca-Sn electrode. The reason why Ce decreases the volume of hydrogen evolution on Pb-Ca-Sn alloy is that Ce increases the resistance of absorbing step of hydrogen evolution reaction. All the experimental results indicate that Pb-Ca-Sn-Ce alloy can rapidly decrease the oxygen and hydrogen evolution on Pb-Ca-Sn-Ce alloy. It is concluded that Pb-Ca-Sn-Ce alloy can promote the maintenance-free property of lead acid battery, and can serve as the candidate of the grid material for maintenance-free lead acid battery.
文摘A Pb-0.08Ca-2Sn alloy was subjected to rolling at room temperature to different final thicknesses.Annealing treatments at temperature ranging from 80 to 120 °C led to recrystallization of the samples as shown by resistivity and micro-hardness measurements.The deformation texture determined through X-ray diffraction is qualitatively the Brass type.The measured Lankford anisotropy parameter R and its evolution are close to the determined one using a self consistent approach.The R value evolution with angle to rolling direction shows the presence of planar anisotropy and poor drawability.The recrystallization in annealing at 80-120 °C is achieved within time period up to 3×104 s.The recrystallization texture is a retained deformation texture with an emerging Cube component.
