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이 논문의 연구 히스토리 (8)
2022
2016
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The structure of plasma electrolytic oxidation (PEO) coatings was investigated as a function of NaOH concentration in 0.06 M Na₂SiO₃ + 0.06 M Na₃PO₄ solution by using SEM and epoxy replica method. The PEO film was formed on AZ31 Mg alloy by the application of anodic pulse current with 0.2 ms width and its formation behavior was studied by voltage-time curves during the formation of PEO films. It was found that the addition of NaOH into PO₄<SUP>3-</SUP> and SiO₃ <SUP>2-</SUP> containing aqueous solution causes a decrease in the PEO film formation voltage, suggesting that dielectric breakdown of the PEO becomes easier with increasing OH- ion concentration in the solution. With increasing OH- ion concentration, thickness of the PEO film increased and surface roughness decreased. The size of pores formed in the PEO layer became smaller and the number of cracks in the PEO layer increased with increasing OH- ion concentration. Based on the experimental results obtained in the work, it is suggested that OH- ions in the solution can contribute not only to the dielectric breakdown but also to the formation of PEO films in the presence of PO₄<SUP>3-</SUP> and SiO₃<SUP>2-</SUP> ions in the solution.
목차
Abstract
1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
References
참고문헌 (23)
참고문헌 신청
G. Song, and A. Atrens, Corrosion mechanisms of magnesium alloys, Advanced Engineering Materials., 1(1999) 11-33.
G. Makar, and J. Kruger, Corrosion of magnesium, International Materials Reviews., 38(1993), 138- 153.
H. Hu, X. Nie and Y. Ma, Corrosion and surface treatment of magnesium alloys, Magnesium Alloys–Properties in Solid and Liquid States, In- Tech, Croatia., (2014)67.
J. D. Shim, J. Y. Byun, R&D Trend on Surface Treatment of Magnesium Alloys, Korean Journal of Materials Research., 23(2013) 72.
C. Blawert, W. Dietzel, E. Ghali, G Song, Anodizing treatments for magnesium alloys and their effect on corrosion resistance in various environments, Advanced Engineering Materials., 8(2006) 511.
G. Makar, and J. Kruger, Corrosion of magnesium, International Materials Reviews., 38(1993), 138- 153.
H. Hu, X. Nie and Y. Ma, Corrosion and surface treatment of magnesium alloys, Magnesium Alloys–Properties in Solid and Liquid States, In- Tech, Croatia., (2014)67.
J. D. Shim, J. Y. Byun, R&D Trend on Surface Treatment of Magnesium Alloys, Korean Journal of Materials Research., 23(2013) 72.
C. Blawert, W. Dietzel, E. Ghali, G Song, Anodizing treatments for magnesium alloys and their effect on corrosion resistance in various environments, Advanced Engineering Materials., 8(2006) 511.
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UCI(KEPA) : I410-ECN-0101-2016-581-002663595