Technical, Techniques, Hints, and Tips > Other Technical Questions...

Soldering Aluminium

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tonyH:
I seem to remember that on the old MB forum there was a thread about soldering aluminium.
If so, can anyone advise on the solder/flux mix required or am I barking up the wrong tree?

Tony

justboatonic:
I thought aluminium had to be welded and couldnt be soldered as there isnt enough heat? I might be barking mad though  ;)

Halley:


Aluminium is the only metal that oxidises immediately that its surface is exposed to the air.  The bright shiny finish that you see after polishing ALREADY has a thin coating of oxidation (Aluminium 'rust').

You would need to flux it to prevent contact with air BEFORE surface cleaning therefore?  You may be able to solder aluminium, but I've never seen it done.

 

Jankers:
It is possible to solder aluminium but you will need special fluxes to combat the oxidation mention above.

These are available but, sorry,  I don't know from where.

If the parts to be soldered are small i should try superglue, if large enough to accept bolts that is what I would do as solder joints are likely to need a deal of practise before you feel confident in them (IMHO).

IIRC Blackgates Engineering do something for aluminium.

J.

Halley:


IF you Google 'Solder Aluminium' you can get quite a lot of information.

Maplin actually sell a solder for aluminium....

http://www.maplin.co.uk/Module.aspx?ModuleNo=3952&QV=Y

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