Preparation and characterization of PLA coating and PLA/MAO composite coatings on AZ31 magnesium alloy for improvement of corrosion resistance

Electrochemical characteristics of AZ31 magnesium alloy after impacting by ultrasonic impact peening (UIP) were measured in order to evaluate its effect on corrosion resistance of mentioned alloy. For this purpose, potentio-dynamic polarization (PD) tests and electrochemical impedance spectroscopy (EIS) of ground and impacted samples were performed in 0.1 M NaCl solution at the temperature of 22±2 °C after 5 minutes of potential stabilization. The obtained PD curves were analysed using the Tafel extrapolation method and data from EIS measurements in form of Nyquist plots were quantified by the equivalent circuit method. The results showed clearly that application of the UIP significantly deteriorated corrosion resistance of AZ31 alloy in the chosen testing solution.

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Development and assessment of a multifunctional chitosan-based coating applied on AZ31 magnesium alloy: Corrosion resistance and antibacterial performance against Klebsiella Pneumoniae

Journal of Magnesium and Alloys ◽

10.1016/j.jma.2021.03.033 ◽

2021 ◽

Author(s):

Emmanuel Mena-Morcillo ◽

Lucien Veleva ◽

Mariana Cerda-Zorrilla ◽

Montserrat Soria-Castro ◽

Juan C. Castro-Alcántara ◽

...

Keyword(s):

Corrosion Resistance ◽

Magnesium Alloy ◽

Klebsiella Pneumoniae ◽

Az31 Magnesium Alloy ◽

Antibacterial Performance

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Phosphate film free of chromate, fluoride and nitrite on AZ31 magnesium alloy and its corrosion resistance

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(11)61522-7 ◽

2012 ◽

Vol 22 (11) ◽

pp. 2713-2718 ◽

Cited By ~ 13

Author(s):

Xue-jun CUI ◽

Chun-hai LIU ◽

Rui-song YANG ◽

Ming-tian LI ◽

Xiu-zhou LIN ◽

...

Keyword(s):

Corrosion Resistance ◽

Magnesium Alloy ◽

Az31 Magnesium Alloy ◽

Phosphate Film

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Crack self-healing of phytic acid conversion coating on AZ31 magnesium alloy by heat treatment and the corrosion resistance

Applied Surface Science ◽

10.1016/j.apsusc.2014.06.104 ◽

2014 ◽

Vol 313 ◽

pp. 896-904 ◽

Cited By ~ 66

Author(s):

Ruiyue Zhang ◽

Shu Cai ◽

Guohua Xu ◽

Huan Zhao ◽

Yan Li ◽

...

Keyword(s):

Heat Treatment ◽

Corrosion Resistance ◽

Magnesium Alloy ◽

Phytic Acid ◽

Conversion Coating ◽

Az31 Magnesium Alloy ◽

Self Healing

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Preparation and Characterization of a Sol–Gel AHEC Pore-Sealing Film Prepared on Micro Arc Oxidized AZ31 Magnesium Alloy

Metals ◽

10.3390/met11050784 ◽

2021 ◽

Vol 11 (5) ◽

pp. 784

Author(s):

Longlong Zhang ◽

Yuanzhi Wu ◽

Tian Zeng ◽

Yu Wei ◽

Guorui Zhang ◽

...

Keyword(s):

Corrosion Resistance ◽

Magnesium Alloy ◽

Sol Gel ◽

Oxide Coating ◽

Az31 Magnesium Alloy ◽

Hydroxyethyl Cellulose ◽

Gel Spinning ◽

Test Analysis ◽

Pore Sealing ◽

Micro Arc Oxidation

The purpose of this study was to improve the cellular compatibility and corrosion resistance of AZ31 magnesium alloy and to prepare a biodegradable medical material. An aminated hydroxyethyl cellulose (AHEC) coating was successfully prepared on the surface of a micro-arc oxide +AZ31 magnesium alloy by sol–gel spinning. The pores of the micro-arc oxide coating were sealed. A polarization potential test analysis showed that compared to the single micro-arc oxidation coating, the coating after sealing with AHEC significantly improved the corrosion resistance of the AZ31 magnesium alloy and reduced its degradation rate in simulated body fluid (SBF). The CCK-8 method and cell morphology experiments showed that the AHEC + MAO coating prepared on the AZ31 magnesium alloy had good cytocompatibility and bioactivity.

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