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Influences of electrolytes on tribocorrosion performance of MAO coating on AZ31B magnesium alloy in simulated body fluid
Author(s) -
Xu Luyao,
Liu Naiyu,
Cao Lei,
Wan Yong
Publication year - 2021
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13817
Subject(s) - tribocorrosion , materials science , simulated body fluid , corrosion , dielectric spectroscopy , scanning electron microscope , magnesium alloy , microstructure , coating , metallurgy , electrolyte , alloy , polarization (electrochemistry) , magnesium , plasma electrolytic oxidation , electrochemistry , chemical engineering , composite material , electrode , chemistry , engineering
Abstract In this paper, the effects of electrolytes on the corrosion resistance and tribocorrosion performance of micro‐arc oxidation (MAO) coatings on AZ31B magnesium (Mg) alloys in simulated body fluid (SBF) were studied. Scanning electron microscopy (SEM) and X‐ray diffraction (XRD) were utilized to explore the microstructure, surface morphology, and phase components of the MAO coatings. Corrosion and tribocorrosion performance of MAO coated Mg alloys were evaluated by using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and a ball‐on‐disk tribotester. It was found that MAO coating produced in electrolyte containing both Na 2 SiO 3 and Na 2 B 4 O 7 exhibited superior corrosion resistance and tribocorrosion performance in the SBF.