Effects of the second phases on corrosion resistance of AZ91-xGd alloys treated with ultrasonic vibration

Yin, Zhixiang; Yang, Cheng‐Fu; Yan, Hong; Zhou, Guohua; Wu, Xiaoquan; Hu, Zhi

doi:10.1016/j.jallcom.2019.01.002

Cited by 54 publications

(13 citation statements)

References 35 publications

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“…According to the equivalent circuit of the EIS curves of the alloys (Figure 6), the data of the electrochemical impedance spectrum can be fitted and the results were summarized in Table 3. R s was the solution resistance, R t was the charge transfer resistance, R f was the resistance of the corrosion products film and Q was the constant phase angle element (Metalnikov et al , 2019; Yin et al , 2019).…”

Section: Resultsmentioning

confidence: 99%

Investigation on microstructure and corrosion behavior of rolled Mg-1.5Zn-xCa-xCe alloy

Zhang

Cheng

Huang

et al. 2022

ACMM

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Purpose This study aims to investigate the effect of microalloyed Ca and Ce on microstructure and corrosion behavior of Mg-1.5Zn alloy. Mg-1.5Zn-xCa-xCe alloys were prepared by melting, extrusion and rolling processes. Design/methodology/approach The effects of adding Ca and Ce elements alone or adding Ca and Ce elements simultaneously on the microstructure and corrosion resistance of Mg-1.5Zn-xCa-xCe (x = 0 or 0.2 Wt.%) alloys were studied by scanning electron microscopy, hydrogen evolution tests and electrochemical experiments. Findings The addition of Ca and Ce elements alone or the addition of Ca and Ce elements had little impact on the grain size of the rolled and annealed Mg-1.5Zn-xCa-xCe alloy, but had a greater effect on the type and quantity of the second phase. Originality/value The order of the corrosion rates for the three alloys was Mg-1.5Zn-0.2Ca < Mg-1.5Zn-0.2Ca-0.2Ce < Mg-1.5Zn-0.2Ce. Mg-1.5Zn-0.2Ca showed the best corrosion resistance, which was related to the second phase and corrosion products.

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Section: Resultsmentioning

confidence: 99%

Investigation on microstructure and corrosion behavior of rolled Mg-1.5Zn-xCa-xCe alloy

Zhang

Cheng

Huang

et al. 2022

ACMM

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“…R L and L represent inductive resistance and inductance, respectively. Q represents a constant phase angle element [25][26][27]. The Nyquist plots of the four alloys all exhibited two capacitive reactance arcs, while the capacitive reactance arc in the high-frequency region and the low-frequency region is related to the charge transfer process and the surface corrosion product film, respectively [28].…”

Section: Eis Curvesmentioning

confidence: 99%

Effect of Ca Element on Microstructure and Corrosion Behavior of Single-Phase Mg–Sc Alloy

Zhang

Cheng

Huang

et al. 2022

Metals

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The effect of Ca on the microstructure and corrosion behavior of a single-phase Mg–Sc alloy was investigated. The microstructure was characterized by optical microscopy and scanning electron microscopy. Corrosion behavior was measured by hydrogen evolution tests and electrochemical measurements. With the addition of microalloyed Ca, the grain size of Mg-0.3Sc alloy is refined and the Mg2Ca phase particle is precipitated. The corrosion test results reveal that the addition of microalloyed Ca is beneficial to the corrosion resistance of Mg-0.3Sc single-phase alloy, which is related to the grain refinement and the protective performance of the corrosion product film. As the content of Ca increases, the corrosion resistance of the alloy first increases and then decreases, which is mainly related to the microstructure of the alloy.

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“…Thus, enhancing the corrosion resistance of magnesium alloys is a major challenge. There are many methods for increasing the corrosion resistance, and they include alloying [14][15][16], chemical conversion coating [17][18][19], electrochemical plating [20,21], anodic oxidation [22] and addition of corrosion inhibitors [23]. In particular, alloying is widely used to improve the corrosion resistance of ascast magnesium alloys.…”

Section: Introductionmentioning

confidence: 99%

Improving corrosion resistance of high strength Mg-Zn-Y alloy through Ca addition

Wan

Wang

Dong

et al. 2022

Corrosion Engineering, Science and Technology

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High-strength Mg-Zn-Y alloy with a long-period stacking ordered (LPSO) phase was chosen as the base alloy, and different Ca were added to it. The phase component and microstructure of the alloys were examined using diffraction of X-rays (XRD) and scanning electron microscopy (SEM). A new phase, Ca 2 Mg 6 Zn 3 , was found to be formed by the addition of Ca. The hydrogen evolution corrosion method and an electrochemical test showed that the amount of hydrogen evolution without Ca addition was twice that with Ca addition. The corrosion resistance of the magnesium alloy improved when the amount of Ca added was. In order to understand the dynamic corrosion process, we soaked Mg 97 Zn 1 Y 2 -X wt-% Ca (X = 0, 0.1, 0.3, 0.6, 1) alloy in 3.5 wt-% NaCl solution for 2, 6, 12 h. It was observed that with an increase in the Ca content, the degree of corrosion of the alloy gradually decreased, and the amount of granular corrosion products covering the alloy's surface also decreased.

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Effects of the second phases on corrosion resistance of AZ91-xGd alloys treated with ultrasonic vibration

Cited by 54 publications

References 35 publications

Investigation on microstructure and corrosion behavior of rolled Mg-1.5Zn-xCa-xCe alloy

Investigation on microstructure and corrosion behavior of rolled Mg-1.5Zn-xCa-xCe alloy

Effect of Ca Element on Microstructure and Corrosion Behavior of Single-Phase Mg–Sc Alloy

Improving corrosion resistance of high strength Mg-Zn-Y alloy through Ca addition

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