Effect of Polytetrafluoroethylene Coating on Corrosion Wear Properties of AZ31 Magnesium Alloy by Electrophoretic Deposition

In this study, we aim to enhance the corrosion and wear resistance of AZ31 magnesium alloy using electrophoretic deposition (EPD) technology to apply a hydrophobic polytetrafluoroethylene (PTFE) coating. Polyethyleneimine (PEI) serves as a charged dispersant, facilitating uniform deposition of PTFE...

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Bibliographic Details
Published in:Coatings (Basel) 2024-06, Vol.14 (6), p.664
Main Authors: Zhang, Jilun, Chen, Chaoyi, Li, Junqi, Chen, Li
Format: Article
Language:English
Subjects:
Coating effects
Coefficient of friction
Contact angle
Corrosion
Corrosion currents
Corrosion effects
Corrosion resistance
Corrosive wear
Design optimization
Dispersants
Electrical conductivity
Electrodes
Electrophoretic deposition
Fluorine compounds
Friction
Hydrochloric acid
Magnesium alloys
Magnesium base alloys
Microscopy
Morphology
Nanoparticles
Oxidation
Particle size
Polyethyleneimine
Polytetrafluoroethylene
Protective coatings
Specialty metals industry
Spectrum analysis
Stainless steel
Steel
Wear resistance
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Summary:In this study, we aim to enhance the corrosion and wear resistance of AZ31 magnesium alloy using electrophoretic deposition (EPD) technology to apply a hydrophobic polytetrafluoroethylene (PTFE) coating. Polyethyleneimine (PEI) serves as a charged dispersant, facilitating uniform deposition of PTFE particles on the alloy surface. Results demonstrate a significant reduction in corrosion current density (from 67.5 μA/cm2 to 5.2 μA/cm2) and improved wear resistance (wear volume decreased from 0.24167 mm3 to 0.00167 mm3) in a 3.5 wt% NaCl solution compared to uncoated alloy. Moreover, the friction coefficient of the coated sample decreases. These findings underscore the potential of nano-PTFE coatings prepared via EPD in enhancing AZ31 magnesium alloy’s corrosion and wear resistance, providing a foundation for future protective coating design and optimization.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings14060664