Study of Effect of Ce-Rich Mixed Rare Earth on Corrosivity of New 5XXX Series Aluminium Alloys

Abstract

In this paper, AL-Mg-Mn-RE series alloys are becamed object of study.They are prouced with pure alumimum, pure Mg,electrolytic Mn and mix rich Ce rare earth. The effect of rare earth content on the resistance of the Al-Mg-Mn-RE series alloys are investigated by using Anodic polarization curves, electrochemical impendance spectroscopy. The results showed that their corrosivity is influenced by RE content in aluminum alloys.NO.3.3 impedance of Al-Mg-Mn-RE alloys is larger in the Nyquist diagram and its corrosion current of alloy decreases obviously. Then corrosivity of alloy is the best and the RE content is 0.3%,When the RE content is higher or lower than it that corrosivity isn’t improved but descended.

Effect of Er on Microstructure and Corrosion Behavior of Al–Zn–Mg–Cu–Sc–Zr Aluminum Alloys

“…In the aerospace field, the 7xxx series aluminum alloy has been widely applied due to its high strength, high modulus, and low density; however, its corrosion resistance is not ideal, which seriously restricts the safe use of this alloy series [ 1 , 2 , 3 ]. Adding a trace amount of rare earth and transition elements can markedly refine the grains, improve the dendritic segregation, and enhance the corrosion resistance of the alloy [ 4 , 5 , 6 , 7 ]. Sc can achieve a more obvious effect because, once added, it contributes to the formation of primary and secondary Al 3 Sc phases.…”

First-Principles Calculation of Al-Cu-Mg Alloy Strengthening Phase

“…Aluminum has been widely used in aviation industry, automobile industry, extensive daily life because of a series of advantages such as light weight, high strength, good corrosion resistance, excellent electrical conductivity and thermal conductivity, formability, non-toxic, environmentally friendly etc. With the development of science and technology and the improvement of people's living standards, scientists are constantly seeking to improve the strength of the material static methods, while focus on improving its overall performance as well [1][2][3][4][5] . In a variety of aluminum, Al-Cu-Mg alloy is an age-hardening aluminum alloy discovered early, which has a low density, high strength, good processing properties and good weldability comprehensive performance, Therefore Al-Cu-Mg alloy has been increasing attentions [6][7][8][9][10] .…”