is there any kind of solder or technique that can solder copper to aluminium? or is it just not possible!?Yikes, this post is chock full of misleading information. Of course it\'s possible. How do I know? I do it 6-8 hours a day. Lead/tin and tin/copper solders bond to aluminum very well, they just don\'t bond to aluminum oxide. This soldering can be done by exposing fresh aluminum through scoring, scraping or sanding, then quickly soldering. Or use a purge box like we do - exclusion of oxygen solves the issue nicely, but an initial capital expense is required. Please - if you don\'t know, don\'t answer. It degrades the usefulness of the site.Conventional tin/lead alloys cannot be used to solder aluminium to anything: it\'s just not possible.The okorder.com/... which are tin plated copper tags or strips bolted to the aluminium chassis.Not using solder or other alloys of tin and lead. However, brazing may be possible. But you will need someone skillful.piece okorder.com/... well actually near enough impossible but there are lots of interesting ways to fail on YouTubeOther related question