<trans-title>Mg(OH)<sub>2</sub> Film on Micro-arc Oxidation Ceramic Coating of AZ31 Magnesium Alloy: Preparation and Corrosion Resistance</trans-title>

Zhihu WANG; Jumei ZHANG; Lijing BAI; Guojun ZHANG

doi:10.15541/jim20190426

Journal of Inorganic Materials, Volume. 35, Issue 6, 709(2020)

Mg(OH)₂ Film on Micro-arc Oxidation Ceramic Coating of AZ31 Magnesium Alloy: Preparation and Corrosion Resistance

Zhihu WANG1... Jumei ZHANG2, Lijing BAI1 and Guojun ZHANG1,* |Show fewer author(s)

Author Affiliations

¹School of Materials Science and Engineering, Xi'an University of Technology, Xi’an 710048, China

²School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi’an 710054, China

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Figures & Tables(10)

1. XRD patterns of AZ31 substrate, MAO coating and HT/MAO composite coating

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2. Surface morphologies of MAO coating and HT/MAO composite coating

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3. EDS spectra and element contents of (a) MAO and (b) HT-2.0/MAO

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4. Static contact angles of MAO coating and HT/MAO composite coating

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5. Potentiodynamic polarization curves of AZ31 substrate, MAO, HT-0.2/MAO and HT-2.0/MAO

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6. Nyquist and Bode plots of bare AZ31 and coated samples as well as equivalent circuit

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7. R_out, R_innand R_totalvalues of three coatings

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8. XRD patterns of MAO and HT-0.2/MAO before and after immersion in 3.5wt% NaCl solution

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9. Surface morphologies of MAO and HT-0.2 /MAO after immersion in 3.5wt% NaCl solution for 14 d

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Table 1. Fitting parameters derived from the potentiodynamic polarization curves

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Table 1. Fitting parameters derived from the potentiodynamic polarization curves

Samples	E_corr/V	I_corr/(µA·cm^-2)	β_a/V	β_c/V	R_P/(kΩ·cm²)	C_R/(mm·a^-1)
Bare AZ31	-1.460	22.34	0.284	0.395	3.211	510.5×10^-3
MAO	-1.383	0.0530	1.340	0.209	1.481×10³	1.211×10^-3
HT-0.2/MAO	-1.376	0.0345	0.938	0.409	3.585×10³	0.788×10^-3
HT-2.0/MAO	-1.350	0.0187	1.226	0.208	4.129×10³	0.427×10^-3

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Zhihu WANG, Jumei ZHANG, Lijing BAI, Guojun ZHANG. Mg(OH)₂ Film on Micro-arc Oxidation Ceramic Coating of AZ31 Magnesium Alloy: Preparation and Corrosion Resistance[J]. Journal of Inorganic Materials, 2020, 35(6): 709

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