Improving the Corrosion Resistance of Micro-Arc Oxidization Film on AZ91D Mg Alloy through Silanization
Junchi Liu, Hang Yin, Zhengyi Xu, Yawei Shao, Yanqiu Wang
Abstract
The presence of inherent micro-pores and micro-cracks in the micro-arc oxidation (MAO) film of Mg alloys is a key factor contributing to substrate corrosion. A composite film layer with high corrosion resistance was achieved through silanizing the micro-arc oxidation film. The corrosion performance of the MAO films treated with various silane coupling agents was assessed through morphological characterization and electrochemical tests. SEM graphs depicted that the silane film can effectively seal the defects existing in micro-arc oxidation film, and electrochemical tests indicated the significant corrosion resistance improvement of MAO film after silanization treatment.
Topics & Concepts
SilanizationCorrosionMaterials scienceMicro arc oxidationSilaneAlloyMetallurgyElectrochemistrySubstrate (aquarium)Layer (electronics)Arc (geometry)Composite materialMagnesium alloyElectrodeChemistryPhysical chemistryGeometryOceanographyMathematicsGeologyMagnesium Alloys: Properties and ApplicationsCorrosion Behavior and InhibitionAluminum Alloys Composites Properties