[TheForge] Question about MIG welding, spray deposition?

[Peter Fels & Phoebe Palmer]

Oh garsh...skuff


Mike Spencer wrote:
> pf> I don't dare ask what Shizznit is, however Yiddish the word may
> pf> sound.
> 
> UrbanDictionary should be right up your alley.  You seem to live as
> far from access to street jargon as I do, or nearly so.
> 
>     http://www.urbandictionary.com/define.php?term=the%20shizznit
> 
> pf> Well it is fine droplets of the feed wire spraying the puddle via the 
> pf> arc...the arc is a plasma i guess.
> 
> But not what the books call "plasma spray" or similar.  IIRC, you can
> spray glass through an arc and deposit it on metal as enamel
Wow!
  as well
> spray as other mixed metal-on-metal coatings.  I never saw the rig,
> just read about it.  It sounded real cool until I realized that the
> gear was big bucks.
The feed stock is really steep too, last i saw.
I had a really old one that i sent to the company requesting parts. They 
sent me a cap and Tshirt saying no parts available and that they were 
keeping it for their museum...wouldn't i really like to buy a nice new one?
> 
> But I'll have to measure the rate of wire feed for my humble machine,
> see if the docs mention the actual voltage and a way to reverse the
> polarity.  New stuff to learn. 
Think most MIGs can reverse polarity ( i just swapped the cables around) 
cause flux cored wire runs opposite solid wire.
> 
> 
> Unrelated topic: If anybody's doing tinning of copper cookware, tell
> me how you do it.  I've done it a dozen or more times.  Sometimes I
> get perfect results, other times less than perfect.  So I'd be keen to
> learn any tricks that I don't know.  I've been using Canada Metal
> Tin-Rite(tm), sometimes with extra tin filings, big propane torch,
> either cotton, leather or 0000 steel wool for wiping.
The runny eyed guy i talked to in a little shop in Greece who did 
antique restoration used a charcoal forge, meticulous degreasing and 
lots of muriatic acid ( hence the red runny eyes). He used cotton 
batting and spat copiously on it before spreading the tin.
Think that steel wool comes oiled as a preservative and fine fragments 
can contaminate the tin.
Is it possible that with the torch, small areas get overheated just 
enough to form an oxide layer and reject the tinning?
> 
> 
> - Mike
>