Effect of Ca addition on the corrosion behavior of Mg–Al–Mn alloy

Yang, Jianguo; Peng, Jian; Nyberg, Eric A.; Pan, Fusheng

doi:10.1016/j.apsusc.2016.01.283

Cited by 125 publications

(48 citation statements)

References 43 publications

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“…The different Ca‐containing phases generate with the addition of 0.8 and 1.5 wt% Ca, respectively. With a small amount of Ca addition, no Ca‐containing phase peak is found in the #2 alloy, which indicates that Ca maybe has been dissolved into Mg 17 Al 12 phase to improve the thermal stability of the phase . The addition of more Ca results in the emergence of thin acicular Al 2 Ca and bone‐shaped (Mg,Al) 2 Ca phases in the sample #3 and #4, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The surface film on magnesium alloys in aqueous solution is to be mainly Mg(OH) 2 . The corrosion reactions are presented by the following equations:

Mg \to {Mg}^{2 +} + 2 {normale}^{-}

Al \to {Al}^{3 +} + 3 {normale}^{-}

2 {normalH}_{2} O + 2 {normale}^{-} \to {normalH}_{2} ↑ + 2 {(OH)}^{-}

…”

Section: Resultsmentioning

confidence: 99%

“…Thus, when RE was added in #1 alloy, the RE‐containing corrosion products formed on the surface film and effectively prevent the chloride ions from passing through the passive film. Additionally, Yang et al found that the Mg‐5Al‐2Ca alloy possesses good corrosion resistance, which can be attributed to oxide films of Ca‐containing corrosion products. In this study, the (Ce,Y) 2 O 3 and Ca‐containing corrosion products combined with the hydroxides and oxide of Al in the surface film made the corrosion surface film more homogeneous and dense.…”

Section: Resultsmentioning

confidence: 99%

“…However, more Ca addition can decrease the corrosion resistance for magnesium alloys. Yang et al investigated the corrosion resistance of Mg‐5Al‐ x Ca ( x = 0.2, 1.0, 2.0, 4.0) alloys, and concluded that the Mg‐5Al‐2Ca‐Mn alloy possesses the best corrosion resistance. This is because that the massive and discontinuous (Mg, Al) 2 Ca phases act as anode to protect the α‐Mg matrix.…”

Section: Introductionmentioning

confidence: 99%

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Microstructures and corrosion behaviors of squeeze‐cast Mg‐4Al‐2RE and Mg‐4Al‐0.5RE‐xCa (x = 0.3, 0.8, and 1.5) alloys

Chen

Abel

Cramer

et al. 2018

Materials & Corrosion

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To develop low‐cost and ultrahigh strength magnesium alloys, AE42 (Mg‐4Al‐2RE) alloy is modified by adding Ca (Mg‐4Al‐0.5RE (RE = Y, Ce)‐xCa (x = 0.3, 0.8, and 1.5)) to replace the majority of rare earth elements. The microstructures of squeeze‐cast AE42 and Mg‐4Al‐0.5RE‐xCa alloys are investigated by XRD, EPMA, and SEM, respectively. The corrosion behaviors of all alloys are studied by gravimetric measurements and electrochemical tests. Results show that the microstructure difference between AE42 and Mg‐4Al‐0.5RE‐xCa alloys is that with the addition of Ca, dendritic and acicular Al‐RE phases are suppressed and thin acicular Al2Ca or bone‐shaped (Mg, Al)2Ca phases are formed. Because the reduction of Al‐RE phases can decrease the number of cathode and the Ca‐containing phases have lower potential, the corrosion resistance of Mg‐Al‐0.5RE‐xCa alloys is significantly better than that of AE42 alloy. The alloy with 0.8 wt% Ca addition shows the best corrosion resistance, which can be attributed to the effect of mixed oxide film of RE and Ca and moderate Al2Ca phase discontinuously distributed on the grain boundaries.

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Section: Resultsmentioning

confidence: 99%

“…The surface film on magnesium alloys in aqueous solution is to be mainly Mg(OH) 2 . The corrosion reactions are presented by the following equations:

Mg \to {Mg}^{2 +} + 2 {normale}^{-}

Al \to {Al}^{3 +} + 3 {normale}^{-}

2 {normalH}_{2} O + 2 {normale}^{-} \to {normalH}_{2} ↑ + 2 {(OH)}^{-}

…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Microstructures and corrosion behaviors of squeeze‐cast Mg‐4Al‐2RE and Mg‐4Al‐0.5RE‐xCa (x = 0.3, 0.8, and 1.5) alloys

Chen

Abel

Cramer

et al. 2018

Materials & Corrosion

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show abstract

“…The existence of inductance loop in low frequency is related to the change in the surface status of the specimen and the relevant adsorption process. 21) At − 350 mV, pitting increased the roughness of the specimen surface, thereby facilitating the adsorption of corrosion products; while at − 1 300 mV, the adsorption of hydrogen atoms also changed the surface electrochemical status. The equivalent circuit shown in Fig.…”

Section: )mentioning

confidence: 99%

Electrochemical Characterization on the Potential Dependent Stress Corrosion Cracking Mechanism of 10Ni8CrMoV High Strength Steel

et al. 2017

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Stress corrosion cracking (SCC) of 10Ni8CrMoV high strength steel influenced by applied potentials in simulated seawater are investigated by combining slow strain rate tensile (SSRT) tests with electrochemical measurements. The potential region corresponding to different cracking mechanism is divided, and the SCC susceptibility is also discussed. The results show that the potential dependent SCC mechanism can be given theoretically by using potentiodynamic polarization at different scanning rate, cyclic voltammetry and dynamic electrochemical impedance spectroscopy (DEIS) measurements, which includes ductile fracture through slip separation with serious uniform corrosion, transgranular SCC (TGSCC) under anodic dissolution (AD), retarded crack growth under the cathodic protection, and intergranular SCC (IGSCC) under hydrogen embrittlement (HE). With the negative shift of the potential, the SCC susceptibility of the steel increases firstly above the open circuit potential (OCP) and decreases later under the cathodic protection, then increases again below the hydrogen evolution potential. The bainite lath grain boundary of 10Ni8CrMoV steel has opposite effects on TGSCC and IGSCC.

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Investigating the Effect of Calcium Alloying and Electrolyte Medium on the Corrosion Behavior of AZ31 Mg Alloy

Chaudry

Farooq

Ahn

et al. 2023

Springer Proceedings in Physics

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Effect of Ca addition on the corrosion behavior of Mg–Al–Mn alloy

Cited by 125 publications

References 43 publications

Microstructures and corrosion behaviors of squeeze‐cast Mg‐4Al‐2RE and Mg‐4Al‐0.5RE‐xCa (x = 0.3, 0.8, and 1.5) alloys

Microstructures and corrosion behaviors of squeeze‐cast Mg‐4Al‐2RE and Mg‐4Al‐0.5RE‐xCa (x = 0.3, 0.8, and 1.5) alloys

Electrochemical Characterization on the Potential Dependent Stress Corrosion Cracking Mechanism of 10Ni8CrMoV High Strength Steel

Investigating the Effect of Calcium Alloying and Electrolyte Medium on the Corrosion Behavior of AZ31 Mg Alloy

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