Influence of humidity on atmospheric pressure air plasma treatment of aluminium surfaces

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Authors

PRYSIAZHNYI Vadym ZAPOROJCHENKO V b KERSTEN Holger ČERNÁK Mirko

Year of publication 2012
Type Article in Periodical
Magazine / Source Applied Surface Science
MU Faculty or unit

Faculty of Science

Citation
Web article details
Doi http://dx.doi.org/10.1016/j.apsusc.2012.02.040
Field Plasma physics
Keywords Aging effect; Aluminium; Humid air plasma; Surface DBD; Surface treatment
Description Atmospheric pressure air plasma treatment of aluminium surfaces and its aging behaviour in different environments were studied. Two types of aluminium samples with different purity and surface morphology were treated using the diffuse coplanar surface barrier discharge (DCSBD). Surface free energy (SFE) and X-ray photoelectron spectroscopy (XPS) have been utilised to characterise changes induced by the plasma. A significant decrease of hydrocarbon contaminants after the plasma treatment was observed. It is concluded that besides the re-contamination by exposure to ambient air, the aging effect, i.e. decrease of the surface free energy of plasma treated surfaces, can be due by dehydration of aluminium oxide layer. Also, it was observed that the humid air plasma treatment resulted in generation of NOx surface groups.
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