Why grease battery terminals?

Not convinced on the doesn't weld situation.
Two sheets of metal left in the rain to rust and
welded together with the rust/oxidation.
And can't two different metals be welded together, with a third element, welding rod ?

I have no idea about this, just my opinion, that's all

Handyandy - really
 
> Hey DA, I once had an Alfasud built entirely out of
welds like that!

PP

Showin' your age their mate!

Was it a Ti 1.3 or 1.5?

I had a GTV V6! One of the best looking cars around at the time. :)
 
I recall (many years ago) seeing a demo in my
engineering diploma course of two 'perfect' metal
surfaces being 'welded' (that's what the lecturer
called it) together by simply being slid over
eachother by hand. It wasn't all that strong - it
could be prised apart by hand too...
Click to expand...
Doesn't sound like what I'd call a weld...

Sure it wasn't just air pressure holding them together?
 
Hi handyandy.

The welding rod has to be of the same material - the idea is that the metals are fused together (the metal in contact with the weld also melts)and should be pretty much as strong as the continuous material.

Eg: If a spelter (brass alloy) is used, it's 'brazing'.

Hi b-a-s. Thinking back, an air-tight seal could have done it! He did call it a 'weld' though! It was a long time ago...
 
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