AI Article Synopsis
- The study focuses on creating new hybrid coatings made from organic polyvinyl alcohol (PVA) and inorganic neodymium nitrate to protect magnesium alloy from corrosion.
- Various advanced techniques were used to analyze the coatings' chemical and structural properties, ensuring an effective design.
- The findings indicate that the coatings enhance corrosion resistance and possess a self-healing ability, making them particularly useful for improving durability in magnesium alloys.
Article Abstract
This work reports the design and preparation of novel organic (polyvinyl alcohol, PVA)-inorganic (neodymium nitrate, Nd(NO)) hybrid coatings on micro-arc oxidation (MAO) coating for magnesium (Mg) alloy corrosion protection. X-ray diffractometer, X-ray photoelectron spectroscopy, fourier transform infrared spectroscopy, field emission scanning electron microscope, Energy Dispersive X-ray spectrometer and surface roughness were applied to characterize the chemical composition and surface morphology of the coatings. The corrosion resistance of the coatings was evaluated by electrochemical and salt spray tests. The results suggested that the formation of PVA-Nd and PVA-Mg complexes promoted the enrichment of Nd on the surface, and thereby improved the sealing quality and compactness of the coating. Interestingly, when the coating was damaged, the Nd ions were transformed to their carbonates and covered the active sites, and thus exhibiting self-healing function. Further, the corrosion resistance of PVA-Nd modified MAO composite coating on AZ31 Mg alloy was improved.
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| http://dx.doi.org/10.1016/j.jcis.2022.10.087 | DOI Listing |
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