Corrosion behavior characterization of as extruded Mg-8Li-3Al alloy with minor alloying elements (Gd, Sn and Cu) by scanning Kelvin probe force microscopy

Hu, Zhi; Yin, Zhixiang; Zhang, Yin; Wang, Kun; Liu, Qidong; Sun, Pengfei; Yan, Hong; Song, Honggun; Luo, Cheng; Guan, Hongyu; Chassagne, Luc

doi:10.1016/j.corsci.2020.108923

Cited by 54 publications

(9 citation statements)

References 44 publications

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“…The equivalent circuit diagram of the X2CrNi12 stainless steel with 50% and 90% cold-rolling reduction at different annealing temperatures is shown in Figure 15 . In the equivalent circuit diagram, R s is the solution resistance between the working electrode and the reference electrode, and its value only depends on the conductivity of the test medium; R t is the polarization resistance, and the larger the R t value, the better the corrosion resistance; CPE is the constant phase element, and it is mainly a double-layer capacitance on the surface of the electrolyte/substrate [ 32 ]. The CPE consists of two parameters, Y 0 and n. Y 0 represents the non-ideal capacitance, which is a dispersion effect caused by cracks, surface oxide films, impurities and secondary phases [ 33 ]; n (0 < n < 1) is a dispersion degree index.…”

Section: Resultsmentioning

confidence: 99%

Effect of Cold-Rolling Reduction on Recrystallization Microstructure, Texture and Corrosion Properties of the X2CrNi12 Ferritic Stainless Steel

Wang³

et al. 2022

Materials

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X2CrNi12 ferritic stainless steel has a wide range of application prospects in the railway transportation, construction, and automobile fields due to its excellent properties. The properties of X2CrNi12 ferritic stainless steel can be further improved by cold-rolling and subsequent annealing treatment. The purpose of this work is to investigate the effect of cold-rolling reduction on the microstructure, texture and corrosion properties of the recrystallized X2CrNi12 ferritic stainless steel by using SEM, TEM, EBSD and electrochemical testing technology. The results show that the crystal orientation characteristics of the cold-rolled sheet could be inherited into the annealed sheet. The higher cold-rolling reduction could promote the deformed grains rotating into the {111}<uvw> orientation, increasing storage energy and driving force for recrystallization, which could reduce the recrystallized grain size. The orientation densities of α-fiber and γ-fiber were low at 50% cold-rolling reduction. After recrystallization annealing, a large number of grains with random orientation could be produced, and the texture strength was weakened. When the cold-rolling reduction rose to 90%, the γ-fiber texture at {111}<110> was strengthened and the α-fibers, particularly the {112}<110> component, were weakened after recrystallisation annealing, which could improve the formability of the steels. The proportions of special boundaries, i.e., low-angle grain boundaries and low-Σ CSL boundaries, among the grain boundary distribution of the recrystallized X2CrNi12 stainless steel were higher when the reduction was 90%, especially when the annealing temperature was 770 °C. Additionally, the proportion of LAGBs and low-Σ CSL boundaries were 53% and 7.43%, respectively, which improves the corrosion resistance of the matrix, showing the best corrosion resistance.

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Section: Resultsmentioning

confidence: 99%

Effect of Cold-Rolling Reduction on Recrystallization Microstructure, Texture and Corrosion Properties of the X2CrNi12 Ferritic Stainless Steel

Wang³

et al. 2022

Materials

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“…A silicon tip with a Pt/Ir-coating of 20 nm thickness was utilized for acquisition of topography and surface potential signal with the tip frequency of 75 kHz and the AC modulation of 1 V at 10 kHz. 22 The surface topography was performed in PeakForce Tapping mode in ambient air. 100 nm tip lift height was used to record the potential distribution.…”

Section: Methodsmentioning

confidence: 99%

Effect of Ultrasonic Treatment during Solidification on Corrosion Behavior of Mg-3Al-1Zn and Mg-4Zn Magnesium Alloys

Yang

Yan

et al. 2020

J. Electrochem. Soc.

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In this work, effect of ultrasonic treatment during solidification on corrosion behavior of Mg-3Al-1Zn and Mg-4Zn alloy was studied by electrochemical, scanning Kelvin probe force microscopy (SKPFM), hydrogen evolution and micro-zone local corrosion simulation tests. Optical microscopy results revealed the second phases were evidently refined as a result of the ultrasonic treatment during solidification. Potentiodynamic polarization measurements showed better corrosion behavior was obtained in ultrasonically treated alloys with refined second phase. Volta potential mapping indicated higher electrochemical nobility of the β-Mg17Al12 and MgZn2 phase with respect to the α-Mg matrix. The result of micro-zone local corrosion simulation of Mg-3Al-1Zn alloys showed that the discrete, finer β-Mg17Al12 phase in ultrasonic treated alloy had lower anodic average current density than that of the conventionally cast alloy (about 17.6%).

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“…Previous studies have mainly focused on the microstructure and mechanical properties of Mg-Gd-Y-Nd-Zr alloys or the different corrosion resistance between the cast and deformed Mg alloys [ 18 , 23 , 24 , 25 , 26 , 27 ]. The relationship between the structure and corrosion resistance of magnesium alloys treated with different deformation processes has been seldom studied.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Corrosion Performance of Extruded and Forged WE43 Mg Alloy

Liu

Feng

et al. 2022

Materials

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Adjusting the microstructure through the deformation process is one of the ways to improve the properties of Mg alloys. Most studies have focused on the influence of the microstructure after deformation treatment on the mechanical properties of Mg alloys. In this paper, extruded and forged Mg-Gd-Y-Nd-Zr alloys were selected to investigate the corrosion performance of two deformed magnesium alloys immersed in 0.6 M NaCl solution using a hydrogen evolution test, a weight loss test, an immersion experiment, and an electrochemical test. The results showed that WE43 alloys undergoing different deformation treatments presented different microstructures, which led to different corrosion behaviors and corrosion resistance. The extruded WE43 alloy showed uniform corrosion, while the forged WE43 alloy suffered severe local galvanic corrosion. Meanwhile, the corrosion rate of the forged WE43 alloy was about four times faster than that of the extruded WE43 alloy.

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Corrosion behavior characterization of as extruded Mg-8Li-3Al alloy with minor alloying elements (Gd, Sn and Cu) by scanning Kelvin probe force microscopy

Cited by 54 publications

References 44 publications

Effect of Cold-Rolling Reduction on Recrystallization Microstructure, Texture and Corrosion Properties of the X2CrNi12 Ferritic Stainless Steel

Effect of Cold-Rolling Reduction on Recrystallization Microstructure, Texture and Corrosion Properties of the X2CrNi12 Ferritic Stainless Steel

Effect of Ultrasonic Treatment during Solidification on Corrosion Behavior of Mg-3Al-1Zn and Mg-4Zn Magnesium Alloys

Comparison of Corrosion Performance of Extruded and Forged WE43 Mg Alloy

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