热轧加工工艺对快速降解Mg-Li合金力学性能及腐蚀行为的影响

庞梦瑶, 巫瑞智, 马晓春, 靳思远, 于哲, Boris Krit

Effect of Hot Rolling Process on Mechanical Property and Corrosion Behavior of Rapidly Degrading Mg-Li Alloy

PANG Mengyao, WU Ruizhi, MA Xiaochun, JIN Siyuan, YU Zhe, Boris Krit

图11 250 ℃下不同轧制变形量Mg-8Li-4Gd-1.5Ni合金在3.0%KCl溶液中的电化学阻抗谱(EIS)及等效电路图

Fig.11 Electrochemical impedance spectroscopy (EIS) (a-c) and equivalent circuit (d) of rolled Mg-8Li-4Gd-1.5Ni alloy with different deformations at 250 oC after soaking in 3.0%KCl solution (a) Nyquist curves (Z'—real part of the impedance, Z"—imaginary part of the impedance) (b) Bode angle plots (f—frequency) (c) Bode impedance plots (|Z|—mode of impedance) (d) equivalent circuit (Rs—solution resistance, CPE1—a constant phase element representing the surface film capacitance, Rf—surface film resistance mainly determined by the film porosity and the solution conductivity in the film pores, CPE2—a constant phase element related to the double layer capacitance, Rct—charge transfer resistance at film/substrate interface, L—inductance meaning the collapse of partial protective film)