摘要
The effect of indium alloying on the corrosion and discharge behaviors of Mg-Al-Zn-Ga alloys is investigated via materials characterization,immersion test and electrochemical methods.The results indicate that indium alloying can effectively modify the distribution of intermetallic phases in Mg matrix via promoting the segregation of Al in the form of Mg17Al12 in matrix.The addition of indium can effectively activate Mg-Al-Zn-Ga alloy evidenced by increased hydrogen evolution volume and weight loss,negative shift of corrosion and discharge potentials,increase of corrosion current density,decrease of polarization resistance and promoted Faradic efficiency.Nonetheless,excessive indium alloying(2.0 wt.%)would strikingly deteriorate the electrochemical performance of Mg-Al-Zn-Ga anode due to the exorbitant active effect.The Mg-6 wt.%Al-3 wt.%Zn-1 wt.%Ga-1 wt.%In in as-cast state with acceptable corrosion rate and desirable discharge performance is a low cost,non-toxic and well-performance magnesium alloy,which is a promising anode materials for seawater-activated batteries.
The effect of indium alloying on the corrosion and discharge behaviors of Mg-Al-Zn-Ga alloys is investigated via materials characterization, immersion test and electrochemical methods. The results indicate that indium alloying can effectively modify the distribution of intermetallic phases in Mg matrix via promoting the segregation of Al in the form of Mg17Al12 in matrix. The addition of indium can effectively activate Mg-Al-Zn-Ga alloy evidenced by increased hydrogen evolution volume and weight loss, negative shift of corrosion and discharge potentials, increase of corrosion current density, decrease of polarization resistance and promoted Faradic efficiency. Nonetheless, excessive indium alloying（2.0 wt.%） would strikingly deteriorate the electrochemical performance of Mg-Al-Zn-Ga anode due to the exorbitant active effect. The Mg-6 wt.%Al-3 wt.%Zn-1 wt.%Ga-1 wt.%In in as-cast state with acceptable corrosion rate and desirable discharge performance is a low cost, non-toxic and well-performance magnesium alloy, which is a promising anode materials for seawater-activated batteries.
基金
the financial support of the Natural Science Foundation of Shandong Province of China(Grant No.ZR2018BD025)
the National Natural Science Foundation of China(Grant No.41576114)
Qingdao Innovative Leading Talent Foundation(Grant No.15-10-3-15-(39)-zch)
Qingdao Science and Technology Achievement Transformation Guidance Plan(Applied Basic Research,Grant No.14-2-4-4-jch)
financially supported by State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Material Research Institute,China(Project No.614290101011703).
