Effects of Lanthanum and Cerium Mixed Rare Earth Metal on Abrasion and Corrosion Resistance of AM60 Magnesium Alloy

2015 ◽  
Vol 44 (3) ◽  
pp. 521-526 ◽  
Author(s):  
Liang Chenghao ◽  
Wang Shusen ◽  
Huang Naibao ◽  
Zhang Zhihong ◽  
Zhang Shuchun ◽  
...  
2012 ◽  
Vol 187 ◽  
pp. 210-214 ◽  
Author(s):  
M.Z.M. Zain ◽  
S. Illias ◽  
M. Mat Salleh ◽  
K. Azwan Ismail ◽  
Z. Nooraizedfiza

Anodization is a useful technique for forming protective films on magnesium alloys and improves its corrosion resistance. Based on the rare earth metal (REE) salt solution, the optimum parameter was selected by comparing the anti-corrosion property of anodic film. The structure, component and surface morphology of anodic film and cross-section were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with Energy Dispersive Spectroscopy (EDS). The corrosion behavior was evaluated by immersion test. In this paper, a dense anodic film approximately 20 µm thick was prepared on a AZ91D magnesium alloy through anodic oxidation coating. The results show that the anodic films were mainly composed of Mg17Al12, Mg17La2, MgO and amorphous compounds. The best corrosion resistance was obtained with specimen anodized in solution containing both lanthanum nitrate and magnesium, whose corrosion resistance is approximately 3 times higher than that of as-received AZ91D magnesium alloy.


2008 ◽  
Vol 5 (5) ◽  
pp. 1308-1311 ◽  
Author(s):  
Lingjie Li ◽  
Jinglei Lei ◽  
Shenghai Yu ◽  
Donghai He ◽  
Weijuan Qu ◽  
...  

The ZE10 magnesium alloy with the rare-earth metal additives, which contribute to a better forming of the alloy, was used as studied material. The ZE10 magnesium alloy with the rare-earth metal additives, which contribute to a better forming of the alloy, was used as studied material. Sheet material is usually straightened on roller levelers to relieve residual stresses and improve flatness. The metal is subjected to alternating deformation by bending when straightening. The changes in the structure, crystallographic texture and, as a result, physical and mechanical properties occur in the metal are often not taken into account in the future. The elastic modulus is an important parameter, for example, in the production of products using bending. In this work, the elastic modulus of sheets of magnesium alloy ZE10 was estimated in three main directions. A starting sheet was obtained by extruding an ingot, then rolling in the longitudinal direction and then rolling with a change in direction by 90° after each pass in combination with heating to 350°C. The original sheets were subsequently subjected to alternate folding. Evaluations were made of the elastic modulus of the original sheet, as well as the sheets after 0.5, 1.0, 3.0 and 5.0 alternating bending cycles. To estimate the elastic modulus, we used the Kearns texture parameters , which we calculated from the inverse pole figures, as well as the elastic constants of the single crystal of the ZE10 alloy found by us. The maximum deviation of the calculated and experimental values of the elastic modulus did not exceed 5.2%. Strong correlations and quadratic regression equations have been established between the values of the elastic modulus, mechanical characteristics (tensile strength, yield stress, elongation), on the one hand, and the above-mentioned parameters of the Kerns texture, on the other hand. The approximation reliability coefficients are 0.76 - 0.99.


2010 ◽  
Vol 156-157 ◽  
pp. 1046-1049
Author(s):  
Ai Ju Li ◽  
Hong Yu Chen ◽  
Rui Zhen Li

The influence of the mixed rare earth metal, Lathanum and cerium, as an alloying additive on the electrochemical behaviour was studied by means of self-depassivation, linear sweep voltammetry and a.c. impedance spectroscopy in 1.28g/m3 H2SO4 at 250C. Studies on Pb-Ca-Sn-Al-Ag-La-Ce alloys indicated the mixed La and Ce can refined crystal grains, inhibit the hydrogen evolution and oxygen evolution, and improve the corrosion-resistance performance. So the mixed La and Ce can prolong life of electric vehicle batteries.


Alloy Digest ◽  
2015 ◽  
Vol 64 (9) ◽  

Abstract Elektron EQ21 is a casting high strength magnesium alloy developed as a heat treatable alloy with rare earth element additions. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive, shear, and bend strength as well as creep. It also includes information on high temperature performance and corrosion resistance as well as casting, forming, heat treating, machining, joining, and surface treatment. Filing Code: Mg-80. Producer or source: Magnesium Elektron Wrought Products, North America.


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