The influence of cold plasma-surface modification on the solderability of aluminum and magnesium alloys
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Abstract
In this article the possibility of application of cold plasma technology for surface treatment of difficult-to-braze metals (PA11 aluminum alloys and AZ31B magnesium alloys) was evaluated. The filler metals used for brazing of magnesium and aluminum alloys, as well as the issues encountered during the process were discussed. The research were car- ried out: wettability and spreadability tests of PA11 aluminum alloy using Al 112 (B-Al88Si12) braze and Al 700 flux; and flame brazing of AZ31B magnesium alloy using Mg 001 (B-MgAl9Zn3Mn1) braze and FMGA flux developed at the Welding Institute in Gliwice. The wetting and spreadability were investigated with and without the use of cold plasma treatment and a comparative analysis was presented. Finally, the significant effect of the cold plasma plasma-surface modification on the brazebility of PA11 aluminum alloys and AZ31B magnesium alloys was demonstrated.
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