Effect of Al on the microstructure, corrosion behavior and mechanical properties of Mg-4Li

Zhang, Cheng; Wu, Liang; Zhao, Zilong; Huang, Guangsheng; Jiang, Bin; Atrens, Andrej; Pan, Fusheng

doi:10.1108/acmm-06-2019-2146

Cited by 9 publications

(2 citation statements)

References 34 publications

(35 reference statements)

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“…As a promising rare earth element (RE), Ce and Nd have been applied in alloying materials to enhance their corrosion resistance without destroying mechanical properties (Li et al , 2020; Dutta et al , 2020; Lu et al , 2018; Zhang et al , 2019). Nevertheless, there are few reports on the incorporation of cerium and neodymium ions into the plating solution to obtain excellent corrosion resistance through the deposition process.…”

Section: Introductionmentioning

confidence: 99%

Effect of rare earth on microstructure and corrosion behavior of electroless Ni-W-P composite coatings

Jia

Sun

Xiao

et al. 2022

ACMM

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Purpose This paper aims to research the effect of different concentrations for Nd(NO3)3 and Ce(NO3)3 on the microstructures and corrosion resistance of Ni-W-P composite coatings through electroless plating method. Design/methodology/approach Scanning electron microscope, attached energy dispersive spectroscopy system and X-ray diffraction were used in this work. Meanwhile, the immersion test and electrochemical tests were used to characterize the corrosion behavior of the coating. Findings The coatings prepared at 1.00 g·L−1 Nd(NO3)3 exhibit a dense structure and high phosphorus content (12.38 wt.%). In addition, compared to the addition of Ce(NO3)3, when Nd(NO3)3 was introduced at a concentration of 1.00 g·L−1, the minimum corrosion rate of the coating was 1.209 g·m−2·h−1, with a noble Ecorr (−0.29 V) and lower Icorr (8.29 × 10−4 A·cm−2). Originality/value The effects of rare earths on the deposition and corrosion resistance mechanisms of Ni-W-P composite coatings were explored, with the rare earth elements promoting the deposition of nickel and tungsten atoms. Simultaneously, the amorphization of the coating increases, which excellently enhances the corrosion resistance of the coating.

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Section: Introductionmentioning

confidence: 99%

Effect of rare earth on microstructure and corrosion behavior of electroless Ni-W-P composite coatings

Jia

Sun

Xiao

et al. 2022

ACMM

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“…The existing refinement methods of Mg-Al alloys mainly include carbon inoculation method, superheating method, anhydrous FeCl 3 method, deformation treatment method, alloying method, etc [9][10][11]. The addition of Fe element in the anhydrous FeCl 3 method reduces the corrosion resistance of the alloys, so it is not widely used in industrial applications [12]. Due to the high temperature involved in the superheating treatment, the Fe content in the melt increases, the liquid Mg oxidizes, and the suction becomes severe.…”

Section: Introductionmentioning

confidence: 99%

Study on the grain refinement mechanism of Mg-Al alloy based on carbon addition

Sun

Hu²,

Chen³

et al. 2022

PLoS ONE

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In this study, a comprehensive treatment process based on the rotary injection of Ar+CO2 Mg-Al alloy melt is proposed. The effect of carbon on the grain refinement of Mg-Al alloy is studied according to the proposed integrated treatment process. The regularity of carbon refinement in the Mg-Al alloy is examined by microstructural observation and theoretical calculation. The results show that carbon has no effect on the grain refinement of Mg-Al alloy when the Al content is less than 1wt.%. However, when the Al content reaches 2 wt.%, the refining effect is obvious, and the grain refinement efficiency is 62%. The refining effect increases with the increase in the Al content, and the refinement efficiency becomes 79% when the Al content reaches 9 wt.%. The size of Al-C-O in the matrix is approximately 5μm, which confirms the existence of Al4C3 phase exists as a heterogeneous nucleating agent. The theoretical calculations suggest that the Al4C3 heterogeneous nucleating agent cannot be formed when the Al content in the Mg alloy is less than 1.34%, so there is no thinning effect under such Al content. The crystallographic calculations reveal that the mismatch between the Al4C3 phase and Mg alloy matrix is only 4.05%, and Al4C3 can exist as a heterogeneous nucleating agent for α-Mg phase. Combining the measured solidification curves with the classical nucleation theory, the wetting angle of Mg-Al alloy on Al4C3 is calculated to be 24.3°.

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Formation and Corrosion Protection of Layered Double Hydroxide Film on Mg-4Li-3Al and Mg-14Li-3Al Alloys

Jin,

Zhong,

et al. 2023

J. of Materi Eng and Perform

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Mg(OH) 2 /Mg-Al layered double hydroxide (LDH) films were prepared on the surface of single phase Mg-4Li-3Al (a-Mg phase) and Mg-14Li-3Al (b-Li phase) alloys by in situ hydrothermal in pure water with chemical-free reagents, respectively. The influence of a-Mg and b-Li phases on the formation of LDH and the corresponding corrosion resistance were investigated. The differences in the growth of LDH on a-Mg and b-Li phases were discussed. Results show that Al element exists mainly as solid solution atoms in the a-Mg phase and mainly as intermetallic compounds in the b-Li phase, which promotes the generation of LDH. Compared with the process on the surface of a-Mg phase, the pH value of the reaction solution in b-Li phase can reach the optimal value in a shorter time for LDH growth, which can effectively reduce the hydrothermal time, and the film contains a higher content of LDH. Compared with the substrate, the corrosion current density of the films is reduced by 1-2 orders of magnitude. After hydrothermal treatment for 12 h, the LDH film on LA143 alloy has the lowest corrosion current density (2.426 3 10 27 A cm 2 ) and dense surface.

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Effect of Al on the microstructure, corrosion behavior and mechanical properties of Mg-4Li

Cited by 9 publications

References 34 publications

Effect of rare earth on microstructure and corrosion behavior of electroless Ni-W-P composite coatings

Effect of rare earth on microstructure and corrosion behavior of electroless Ni-W-P composite coatings

Study on the grain refinement mechanism of Mg-Al alloy based on carbon addition

Formation and Corrosion Protection of Layered Double Hydroxide Film on Mg-4Li-3Al and Mg-14Li-3Al Alloys

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