CAJ | 학술논문

采用恒电流放电、动电位极化和析氢方法测试待测Al?Mg?Sn?In?Ga合金在碱性介质中、高放电电流密度下的电化学性能。结果表明，合金元素镓能够使 Al?Mg?Sn?In 合金在不同电流密度下的工作电位变负，含镓的铝合金在电流密度为650~900 mA/cm2时的放电电位可达?1.3 V，而不含镓的Al?Mg?Sn?In合金的放电电位大于?1.0 V。这是由于镓与铝基体形成固溶体，并在放电过程中形成汞齐，使腐蚀深入到铝基体内部。
채용항전류방전、동전위겁화화석경방법측시대측Al?Mg?Sn?In?Ga합금재감성개질중、고방전전류밀도하적전화학성능。결과표명，합금원소가능구사 Al?Mg?Sn?In 합금재불동전류밀도하적공작전위변부，함가적려합금재전류밀도위650~900 mA/cm2시적방전전위가체?1.3 V，이불함가적Al?Mg?Sn?In합금적방전전위대우?1.0 V。저시유우가여려기체형성고용체，병재방전과정중형성홍제，사부식심입도려기체내부。
In order to evaluate the electrochemical properties of aluminum alloy anode under high current densities in alkaline electrolyte, the galvanostatic discharge, potentiodynamic polarization and hydrogen evolution tests of three experimental Al?Mg?Sn?In?(Ga) alloys were performed. The results show that the alloying element gallium improves the working potentials of experimental Al?Mg?Sn?In alloys under different discharge current densities. The average working potentials of the alloys containing gallium can reach?1.3 V under current density ranging from 650 to 900 mA/cm2, while those of alloy without Ga are only?1.0 V. Such phenomenon is attributed to the solid solution which can form amalgam with aluminum matrix. Such an amalgam can form the hydrolyzed species during the discharge process and lead to the corrosion infiltrating into aluminum matrix.