Corrosion Behavior of Different Coatings Prepared on the Surface of AZ80 Magnesium Alloy in Simulated Body Fluid

A laser shock peening (LSP) layer, a micro-arc oxidation (MAO) bio-coating, and an LSP/MAO bio-composite coating were fabricated on the surface of AZ80 magnesium (Mg) alloy. The LSP-, MAO-, and LSP/MAO-treated samples were subjected to a dynamic immersion test for 24 h in simulated body fluid (SBF)...

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Bibliographic Details
Published inJournal of materials engineering and performance Vol. 29; no. 3; pp. 1609 - 1621
Main Authors Shen, Yongshui, He, Liuyong, Yang, Zengyuan, Xiong, Ying
Format Journal Article
LanguageEnglish
Published New York Springer US 01.03.2020
Subjects
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Engineering Design
Materials Science
Quality Control
Reliability
Safety and Risk
Tribology
magnesium alloy
dynamic corrosion
micro-arc oxidation
electrochemistry
laser shock peening
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Summary:A laser shock peening (LSP) layer, a micro-arc oxidation (MAO) bio-coating, and an LSP/MAO bio-composite coating were fabricated on the surface of AZ80 magnesium (Mg) alloy. The LSP-, MAO-, and LSP/MAO-treated samples were subjected to a dynamic immersion test for 24 h in simulated body fluid (SBF) with a flow rate of 1 mL/s. The corrosion evolution behavior of the three samples in SBF solution was investigated by electrochemical tests at 0.5, 2, 4, 12, 16, and 24 h during the dynamic immersion. The results indicated that the three surface-treated samples exhibited different corrosion behaviors at different degradation stages. The LSP/MAO sample showed the best corrosion resistance. The anti-corrosion effect of the LSP nanocrystalline layer on the substrate material during dynamic degradation is discussed.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-020-04682-4