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为了有效提高铸态钒基固溶体储氢合金的电化学性能,分别采用三种不同的铸造工艺制备了V_3TiNi_(0.56_Sc_(0.1)钒基固溶体储氢合金铸态试样,并进行了显微组织观察以及电化学循环稳定性和电化学腐蚀性能的测试与分析。结果表明:与常规铸造法相比,静置辅助铸造法和双重辅助铸造法有利于改善合金的铸造质量,细化合金晶粒,提高合金的电化学循环稳定性和电化学腐蚀性能,且双重辅助铸造法效果更佳;静置辅助铸造法、双重辅助铸造法分别使放电容量衰减率减小47%、71%,分别使合金的腐蚀电位正移109、237 m V。
In order to effectively improve the electrochemical performance of the as-cast vanadium-based solid solution hydrogen-absorbing alloy, cast samples of V_3TiNi_ (0.56_Sc_ (0.1) vanadium-based solid solution hydrogen storage alloy were prepared by three different casting processes respectively and the microstructure Observation and electrochemical cycling stability and electrochemical corrosion testing and analysis.The results show that compared with the conventional casting method, the static auxiliary casting method and the double auxiliary casting method are beneficial to improve the casting quality of the alloy, refine the alloy grains, Improve the electrochemical cycle stability and electrochemical corrosion resistance of the alloy, and double assisted casting method is better; static auxiliary casting method, double auxiliary casting method respectively reduce the decay rate of discharge capacity by 47%, 71%, respectively, the alloy The corrosion potential is positive shifted 109,237 mV.