Effect of silicate concentrations on nanostructure and corrosion performance of oxide coatings on aluminum by plasma electrolytic oxidation
Publish place: 10th joint meeting of the 5th International Conference on Materials and Metallurgical Engineering Society and Iranian Foundry Society
Publish Year: 1395
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
IMES10_182
تاریخ نمایه سازی: 6 اردیبهشت 1396
Abstract:
ceramic coatings are fabricated on pure aluminum by plasma electrolytic oxidation (PEO)in four kinds of electrolyte systems[phosphate-phosphat/silicate(2g/l)-phosphate-silicate(8g/l)-silicate].Effect of silicate concentrations on nanostructure and corrosion performance of PEO coatings were examined by means of scanning electron microscopy , x-ray diffraction, potentiodynamic polarization in 3.5% NaCl solution. The results showed that PEO films obtained in solutions with 8g/l silicate had better corrosion resistance. Phosphate/silicate (8g/l) electrolyte in comparison to phosphate, silicate and phosphate/silicate (2g/l), had lower porosity and cracks. Corrosion resistance of phosphate/silicate (8 g/l) electrolyte was higher than other electrolytes
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Authors
Mohsen saket bejandi
MSc Student, School of Metallurgy and Materials Engineering
Changiz Dehghanian
Full professor, School of Metallurgy and Materials Engineering,School of Metallurgy and Materials Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran.
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