Influence of electric parameters on MAO of AZ91D magnesium alloy using alternative square-wave power source

Chang, Linrong; Cao, Fahe; Cai, J.B.; Liu, Wenjuan; Zhang, Zhao

doi:10.1016/s1003-6326(11)60714-0

Cited by 39 publications

(21 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Typical characteristics of MAO coating with some pores and micro-cracks are similar to the MAO coatings of other magnesium alloys. [21][22][23] Meanwhile, surface morphology of MAO coatings at joint zone and base metal under a certain oxidation time are also similar. It is found that there are more remained discharge pores for 10 min oxidation comparing to the 20 min oxidation.…”

Section: Surface Morphology Of Mao Coatingsmentioning

confidence: 89%

Influence of Microstructure of Friction Stir Welded Joints on Growth and Properties of Microarc Oxidation Coatings on Az31b Magnesium Alloy

Chen

Wang

et al. 2015

Surf. Rev. Lett.

View full text Add to dashboard Cite

Ceramic coatings on friction stir welded (FSW) joints of AZ31B magnesium alloy were fabricated by microarc oxidation (MAO) method in silicate electrolyte. Microstructure, phase constituents, microhardness and electrochemical corrosion behaviors of bare and coated magnesium alloys at di®erent zones of FSW joints for di®erent oxidation time were investigated. The in°uence of microstructure at di®erent zones on the growth of MAO coatings was analyzed. The results show that the MAO coatings on FSW joints are uniform, and they have almost the same morphology, phase constituents, hardness and corrosion resistance at base metal, stir zone and heat-a®ected zone. The properties of MAO coatings are independent on the microstructures of AZ31B alloy. In addition, the microstructures of magnesium alloy near the coating/alloy interface at di®erent zones of FSW joint was not changed by microarc discharge process.

show abstract

Section: Surface Morphology Of Mao Coatingsmentioning

confidence: 89%

Influence of Microstructure of Friction Stir Welded Joints on Growth and Properties of Microarc Oxidation Coatings on Az31b Magnesium Alloy

Chen

Wang

et al. 2015

Surf. Rev. Lett.

View full text Add to dashboard Cite

show abstract

“…Recently, metal-air batteries have become one of the primary power sources with widespread utilization in electronic devices and vehicles. [1][2][3][4][5][6][7] Compared with many conventional primary and rechargeable batteries, the Al-air batteries have much higher energy densities and are more environmentally friendly. [8] Aluminum is one of the most promising metallic anodes for metal-air batteries.…”

Section: Introductionmentioning

confidence: 99%

Effect of 6‐thioguanine, as an electrolyte additive, on the electrochemical behavior of an Al–air battery

Hou

Chen

Wang

et al. 2020

Materials & Corrosion

View full text Add to dashboard Cite

In this study, the electrochemical behavior of an Al–air battery is improved by mixing 6‐thioguanine into 4.0 M NaOH electrolyte. The electrochemical performance of the Al electrodes is analyzed using potentiodynamic polarization, potentiostatic oxidation, and electrochemical impedance spectroscopy. The surface morphology of the Al electrodes after discharging for 1,000 s is characterized using scanning electron microscopy coupled with X‐ray elemental mapping for Al, O, C, N, and S. Furthermore, the utilization efficiencies of these samples are also determined. The results show that the corrosion resistance of the Al electrodes initially increases and then decreases with an increase in 6‐thioguanine concentration. The presence of 6‐thioguanine enhances the corrosion resistance to the maximum, with a corrosion current density (Icorr) of 6.170 mA/cm2, and corrosion inhibition efficiency (η) of 36.56%, at 0.5 mM of 6‐thioguanine.

show abstract

“…However, their application is still limited due to their relatively low strength and poor corrosion resistance [1,2]. The demand for simultaneously improving their strength and corrosion resistance is increasingly becoming the focus of interest of researchers.…”

Section: Introductionmentioning

confidence: 99%

Formation and Corrosion Resistance of Micro-Arc Oxidation Coating on Equal-Channel Angular Pressed AZ91D Mg Alloy

Lü

Zhou

et al. 2016

Metals

View full text Add to dashboard Cite

Abstract:A commercial AZ91D Mg alloy, after bulk grain refinement by various passes of equal-channel angular pressing (ECAP), was selected for micro-arc oxidation (MAO) in silicate electrolyte, corrosion testing in 3.5 wt % NaCl solution and morphology analyses. The results showed that a large number of ECAP passes resulted in the homogeneous ultrafine-grained (UFG) Mg substrate with broken second-phases. The high-energy defects in the ECAPed samples lowered the anodizing potential of the MAO process, but the partial discharge was severe for those samples below eight passes. Increasing the ECAP pass, the compactness and thickness of the MAO coating first decreased and then increased. Due to the compact coating and the existence of Mg 2 SiO 4 , the coated alloy with 16 ECAP passes has a lower corrosion rate and a larger R t value. Besides the well-known strengthening-toughening effect, grain refinement via multi-pass ECAP can improve surface protection of the MAO coating on the UFG Mg alloy.

show abstract

Influence of electric parameters on MAO of AZ91D magnesium alloy using alternative square-wave power source

Cited by 39 publications

References 26 publications

Influence of Microstructure of Friction Stir Welded Joints on Growth and Properties of Microarc Oxidation Coatings on Az31b Magnesium Alloy

Influence of Microstructure of Friction Stir Welded Joints on Growth and Properties of Microarc Oxidation Coatings on Az31b Magnesium Alloy

Effect of 6‐thioguanine, as an electrolyte additive, on the electrochemical behavior of an Al–air battery

Formation and Corrosion Resistance of Micro-Arc Oxidation Coating on Equal-Channel Angular Pressed AZ91D Mg Alloy

Contact Info

Product

Resources

About