Influence of Zeolite Coating on the Corrosion Resistance of AZ91D Magnesium Alloy

Influence of Zeolite Coating on the Corrosion Resistance of AZ91D Magnesium Alloy

The protective performance of zeolite coating on AZ91D magnesium alloy was evaluated using potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) in 0.1 M sodium chloride solution (NaCl). Electrical equivalent circuit (EEC) was developed based upon hypothetical corrosion mecha...

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Bibliographic Details
Main Authors: P. Chakraborty Banerjee, Ren Ping Woo, Sam Matthew Grayson, Amrita Majumder, R. K. Singh Raman
Format: Article
Language:English
Published: MDPI AG 2014-08-01
Series:Materials
Subjects:
magnesium alloys
zeolite coating
electrochemical impedance spectroscopy
corrosion
AZ91
Online Access:http://www.mdpi.com/1996-1944/7/8/6092
Description
Summary:The protective performance of zeolite coating on AZ91D magnesium alloy was evaluated using potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) in 0.1 M sodium chloride solution (NaCl). Electrical equivalent circuit (EEC) was developed based upon hypothetical corrosion mechanisms and simulated to correspond to the experimental data. The morphology and the chemical nature of the coating were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. Post corrosion morphologies of the zeolite coated and the uncoated AZ91D alloy were investigated using SEM. The corrosion resistance of the zeolite coated specimen was at least one order of magnitude higher than the uncoated specimen.
ISSN:1996-1944

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