Publication details

Influence of Chemical Precleaning on the Plasma Treatment Eficiency of Aluminum by RF Plasma Pencil



Year of publication 2016
Type Article in Periodical
Magazine / Source Plasma Science and Technology
MU Faculty or unit

Faculty of Science

Field Plasma physics
Keywords atmospheric pressure plasma; plasma jet; aluminum; surface treatment; surface processing; chemical precleaning
Description This paper is aimed to show the influence of initial chemical pretreatment prior to subsequent plasma activation of aluminum surfaces. The results of our study showed that the state of the topmost surface layer (i.e. the surface morphology and chemical groups) of plasma modified aluminum signiticantly depends on the chemical precleaning. Commonly used chemicals (isopropanol, trichlorethane, solution of NaOH in deionized water) were used as precleaning agents. The plasma treatments were done using a radio frequency driven atmospheric pressure plasma pencil developed at Masaryk University, which operates in Ar, Ar/O2 gas mixtures. The efectiveness of the plasma treatment was estimated by the wettability measurements, showing high wettability improvement already after 0.3 s treatment. The efects of surface cleaning (hydrocarbon removal), surface oxidation and activation (generation of OH groups) were estimated using infrared spectroscopy. The changes in the surface morphology were measured using scanning electron microscopy. Optical emission spectroscopy measurements in the near-to-surface region with temperature calculations showed that plasma itself depends on the sample precleaning procedure.
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