Toward a nearly defect-free coating via high-energy plasma sparks

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486356.do
DOI
10.1038/s41598-017-02702-3
Title
Toward a nearly defect-free coating via high-energy plasma sparks
abstract
A nearly defect-free metal-oxide-based coating structure was made on Al-Mg-Si alloy by plasma electrolytic oxidation at high current density accompanying high-energy plasma sparks. The present coatings were performed at two different current densities of 50 and 125 mA/cm(2) in the alkaline-phosphate-based electrolytes with different concentrations of sodium hexafluoroaluminate (Na3AlF6). The addition of ( Na3AlF6) to the electrolyte used in this study would result in a decrease in the size of the micropore, and a reasonably defect-free coating structure was achieved in the sample treated at high current density of 125 mA/cm(2). This was attributed mainly to the hydrolysis of AlF63- triggered by intense plasma sparks, which resulted in a uniform distribution of fluorine throughout the coating. Accordingly, the corrosion performance of the coating formed in the electrolyte containing 1.5 g/L Na3AlF6 at 125 mA/cm(2) was improved significantly as confirmed by electrochemical impedance analysis. In addition, the formation mechanism of the nearly defect-free coating in the presence of Na3AlF6 was discussed.
provenance
Made available in Cube on 2018-09-28T16:05:25Z (GMT). No. of bitstreams: 0
language
English
author
Kaseem, Mosab
Yang, Hae Woong
Ko, Young Gun
accessioned
2018-09-28T16:05:25Z
available
2018-09-28T16:05:25Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486356.do
Funder
교육부
Funding Program
BK21플러스사업(0.5)
Project ID
1345274180
Jurisdiction
Rep.of Korea
Project Name
Advanced Regional-Linked Education Program for Cutting-Edge Functional Materials for Next-Generation Creative Industries.
rights
openAccess
type
article


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