Akademik Veri Yönetim Sistemi
JOURNAL OF POLYTECHNIC-POLITEKNIK DERGISI, cilt.23, sa.4, ss.1285-1295, 2020 (ESCI)
Plasma Electrolytic Oxidation (PEO) is a coating technique commonly chosen to improve the corrosion and wear properties of Mg and its alloys. Besides, the limited phase composition and porous structure of the PEO coating layer influence negatively the long-term objective of corrosion protection. In recent years, the technique filing the micro or nano-sized particles into porous oxide layer during coating process is a novel approach for PEO. This investigation focuses on how surface morphology, microstructure, phase composition and corrosion behavior of incorporation of particles into PEO coatings on AZ31 magnesium alloy. This study aims at growth MgO/CeO2 nanocomposite coatings by using PEO technique in the electrolyte containing nano-sized cerium oxide (CeO2) particles on MgAZ31 substrate. The structural properties, surface morphology, coating thickness and corrosion behavior of the coatings grown in electrolyte containing different amounts of CeO2 nanoparticles were compared with the particle-free PEO coating. The research results showed that the nanoparticles could not completely fill the dense porous structure of the PEO coatings, reduced the coating growth rate and that the CeO2 nanoparticles are incorporated into the structure as inert. In addition, it is determined that the corrosion resistance of MgO/CeO2 nanocomposite coatings is higher than MgO coatings without particle.