Corrosion Behavior of Mg_(2-x)La_xNi and Mg_(2-x)Ce_xNi Hydrogen Storage Alloy

Authors

Hai-chang ZHANG, College of Chemistry Institute of New Energy Material Chemistry,Nankai University,Tianjin 300071,China;
Hua-bin YANG, College of Chemistry Institute of New Energy Material Chemistry,Nankai University,Tianjin 300071,China;
Jun-hong WANG, College of Chemistry Institute of New Energy Material Chemistry,Nankai University,Tianjin 300071,China;
Zuo-xiang ZHOU, College of Chemistry Institute of New Energy Material Chemistry,Nankai University,Tianjin 300071,China;

Corresponding Author

Hua-bin YANG

Abstract

The corrosion behavior of Mg-base hydrogen storage alloys has been investigated by potentiodynamic polarization and EIS. The results showed that the corrosion current density (i_(corr) ) and the electrochemical polarized resistance of Mg_(2-x)Ce_xNi alloys decreased with x increase, while i_(corr) of Mg_(2-x)La_xNi alloys increased and the electrochemical polarized resistance of Mg_(2-x)La_xNi alloys increased first, then decreased with x increase. SEM results showed that the surface of Mg_(1.85)Ce_(0.15)Ni alloy was relatively even while the surface of Mg_(2-x)La_xNi alloy had remarkedly cracks. The different behavior between Ce and La may be relevant to the structure of Ce, La oxides.

Keywords

Mg-based hydrogen storage alloy, Potentiodynamic polarization, EIS

DOI Link

https://doi.org/10.61558/2993-074X.1606

Publication Date

2005-02-28

Online Available Date

2005-02-28

Revised Date

2005-02-28

Received Date

2005-02-28

Recommended Citation

Hai-chang ZHANG, Hua-bin YANG, Jun-hong WANG, Zuo-xiang ZHOU. Corrosion Behavior of Mg_(2-x)La_xNi and Mg_(2-x)Ce_xNi Hydrogen Storage Alloy[J]. Journal of Electrochemistry, 2005 , 11(1): 12-15.
DOI: 10.61558/2993-074X.1606
Available at: https://jelectrochem.xmu.edu.cn/journal/vol11/iss1/3

References

[1]　CuiN,LuoJL.ACimpedancestudiesofthedischargeprocessofaMg2Ni typehydrogenstoragealloyelectrodein6MKOHsolution[J].J.AlloysandCompds.,1998,265:305.
[2]　NoharaS,HamasakiK,ZhangSG, etal.Electro chemicalcharacteristicsofanamorphousMg0.9V0.1Ni　　alloypreparedbymechanicalalloying[J].J.AlloysandCompnds.,1998,280:104.
[3]　HongTW,KimYJ.Synthesisandhydrogenationbe haviorofMgTiNiHsystemsbyhydrogen inducedme chanicalalloying[J].J.AlloysandCompds.,1998,330~332:584.
[4]　LiuYN,ZhangXJ.EffectoflanthanumadditionsonelectrodepropertiesofMg2Ni[J].J.AlloysandComp ds,1998,267:231.
[5]　YangHB,YuanHT,JiJT, et.al.CharacteristicsofMg2Ni0.75M0.25(M=Ti,Cr,Mn,Fe,Co,Ni,CuandZn)alloysaftersurfacetreatment[J].J.AlloysandComp ds.,2002,330~332:640.
[6]　YangHB,SunH,YangED, etal.Thecorrosionbe haviorofternaryMg2-xMmxNialloys[J].J.Electro chem.Soc.,2002,149:A543.
[7]　ChenJ,YaoP,BradhurstDH, etal.Mg2Ni basedhy drogenstoragealloysformetalhydrideelectrodes[J].J.AlloysandCompds.,1999,293~295:675.
[8]　ZhangYS,YangHB,YuanHT, etal.DehydridingpropertiesofternaryMg2Ni1-xZrxhydridessynthesizedbyballmillingandannealing[J].J.AlloysandComp.,1998,269:278.
[9]　JohnsonD.ZVIEWforWindows,Ver.2.3[Z]1990~2000,ScribnerAssociatesInc.