Is that copper or aluminum, I cannot tell in the photo. If that's copper you can fix it. You need Oxy/Acetylene tourch, and a special HVAC brazing rod known commonly as "Sil-fos"
[ame="https://www.youtube.com/watch?v=kLUXDiFwjgQ"]Brazing Copper to Copper with Sil-Fos® - YouTube[/ame]
Skip to about 3:26
[ame="https://www.youtube.com/watch?v=0HPAcnaNvPs"]How to repair an Air Conditioning condenser leak - YouTube[/ame]
[ame="https://www.youtube.com/watch?v=_ZzydKkMUF4"]Air conditioner outdoor coil repair - YouTube[/ame]
There are of course ways to TIG or gas braze aluminum, but what COMPLICATES it is there is no good way to get rid of the oil (compressor oil) and I would not try and repair alumium