Corrosion resistance of composite oxide film prepared on Ca-added flame-resistant magnesium alloy AZCa612 by micro-arc oxidation

Li, Oi Lun; Tsunakawa, Mika; Shimada, Yuta; Nakamura, Kae; Nishinaka, Kazuto; Ishizaki, Takahiro

doi:10.1016/j.corsci.2017.06.008

Cited by 20 publications

(4 citation statements)

References 40 publications

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“…The magnesium alloy is the lightest structure metal material, and is considered as the green engineering material in the 21st century [1]. Now it is widely applied to the electronic industry, aerospace industry, and auto industry [2,3]. However, for its poor corrosion resistance, magnesium alloy, particularly as the magnesium alloy parts for outdoor applications, is confronted with great challenges [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Corrosion Behavior in Marine Environment of MAO Coatings on Magnesium Alloy

et al. 2020

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To improve the corrosion performance of magnesium alloys in the marine environment, the MAO, MAO–Cu2CO3(OH)2·H2O and MAO–Cu2P2O7 ceramic coatings were deposited on AZ91D magnesium alloys in basic electrolyte and the discoloration mechanism of the Cu-doped MAO coatings and the corrosion behavior of the three MAO coatings in the artificial seawater solution were investigated by SEM, EDS and XPS. The results indicated that the formation and discoloration mechanism of the brown MAO ceramic coatings were attributable to the formation of Cu2O in the coatings. Though the three MAO coatings had a certain protective effect against the corrosion of AZ91D substrate in the artificial seawater, the distinctive stratification phenomenon was found on the MAO–Cu2P2O7 coated sample and the corrosion model of the MAO–Cu2P2O7 coatings in the immersion experiment was established. Therefore, the brown Cu-doped MAO coatings were speculated to significantly reduce the risk of the magnesium parts in marine environments.

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Section: Introductionmentioning

confidence: 99%

Preparation and Corrosion Behavior in Marine Environment of MAO Coatings on Magnesium Alloy

et al. 2020

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“…Magnesium alloy has the advantages of low density, high specific strength, good impact resistance and strong radiation resistance (Bakkar and Neubert, 2007; Seyfoori et al ,2012; Rúa et al , 2019). It has good application prospects in the fields of aviation, automobile parts manufacturing and electronic communications (Muhaffel and Cimenoglu, 2019; Golshirazi et al ,2017; Li et al , 2017; Lee and Do, 2016). However, AZ91D magnesium alloy has high electrochemical activity and is easy to corrode, so surface treatment is often required (Durdu and Usta, 2012; Tazegul et al ,2014; Ly and Yang, 2019; Durdu et al , 2011).…”

Section: Introductionmentioning

confidence: 99%

Study on micro-arc oxidation coating of magnetic metal powder composite magnesium alloy

Cui

et al. 2020

ACMM

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Purpose The purpose of this paper is to prepare composite micro-arc oxide coatings with better wear resistance and corrosion resistance. Design/methodology/approach A nickel powder composite micro-arc oxide film was prepared on the surface of the magnesium alloy by the method of organically combining ultra-fine Ni powder with micro arc oxidation film layer. In this experiment, the changes in the corrosion resistance and microstructure of the composite film layer after adding Ni powder were studied, and the effect of the addition of glycerin on the corrosion resistance of the film layer was analyzed. Findings The results show that the ultra-fine nickel powder was successfully prepared by the liquid phase reduction method, and the micro-arc oxidation process was modified under the optimal addition amount. The surface of the micro-arc oxide film made of ultra-fine nickel powder was found by SEM to have smooth surfaces and few holes. According to X-ray diffraction analysis, the phase composition of the micro-arc oxide film layer was Mg, Ni, NiSiO4, MgNi (SiO4) and Mg2SiO4. According to the results of electrochemical tests, the corrosion resistance of the micro-arc oxidation composite film layer was improved after the addition of ultra-fine Ni powder, the corrosion current was greatly reduced and the impedance has been improved. And after adding glycerin, the surface of the film layer becomes denser, and the corrosion resistance of the micro-arc oxide film is significantly improved. Originality/value Through this experimental research, a micro-arc oxide coating of powder composite magnesium alloy was successfully prepared. The corrosion resistance of the micro-arc oxidation film layer has been improved, and certain functions had been given to the micro-arc oxidation composite film, which has increased the application field of magnesium alloys.

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“…Plasma electrolytic oxidation (PEO), also called micro-arc oxidation (MAO), a new surface treatment technology [ 10 , 11 , 12 ], is attracting more and more attention. PEO technology is mainly used on aluminum [ 13 ], magnesium [ 14 , 15 ], titanium [ 16 , 17 ], and other metals [ 18 ]. Due to its non-pollution and cleaning characteristics, more and more attention has been paid to the plasma electrolytic oxidation technology.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Corrosion Resistance of PEO Coatings Formed on KBM10 Mg Alloy Pretreated with Nd(NO3)3

Jun

et al. 2018

Materials

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Plasma electrolytic oxidation (PEO) technique is one of the important methods used in the surface modification of magnesium alloys. In this paper, the ceramic coatings on pretreated KBM10 magnesium alloy with Nd(NO3)3 solution were prepared by PEO. The effects of Nd(NO3)3 solution concentration on the microstructure and corrosion resistance of PEO coatings on magnesium alloys were investigated by means of scanning electron microscopy (SEM), X-ray diffractometer (XRD), and electrochemical workstation. It was found that the surface of the coatings was porous after PEO, and element Nd could be deposited on the surface of the coatings by pretreatment and existed in the PEO coatings. The coating formed at Nd(NO3)3 solution concentration of 0.06 mol/L exhibited the best corrosion resistance among all the as-prepared coatings.

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Corrosion resistance of composite oxide film prepared on Ca-added flame-resistant magnesium alloy AZCa612 by micro-arc oxidation

Cited by 20 publications

References 40 publications

Preparation and Corrosion Behavior in Marine Environment of MAO Coatings on Magnesium Alloy

Preparation and Corrosion Behavior in Marine Environment of MAO Coatings on Magnesium Alloy

Study on micro-arc oxidation coating of magnetic metal powder composite magnesium alloy

Microstructure and Corrosion Resistance of PEO Coatings Formed on KBM10 Mg Alloy Pretreated with Nd(NO3)3

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