[TheForge] Galvanizing and stainless and TIG pulse settings.

[Robert J Hill]

Hello Paul,
Judging by what you have written it should work just fine.  The  
product will be dipped in what ever solution they use for cleaning of  
scale, rust and such.  There was concern about closed spaces blowing  
out.  A lot of work went into not having cavities.  I hope it pays off.
I have VERY little experience with soldering or brazing.  Looks fun  
but there is never enough time to try it out.
Thanks for your thoughts,
Rob

On Jul 30, 2008, at 10:49, Paul wrote:

Robert J Hill wrote:
> Hello,
> This is going to sound silly but... has anyone had experience with  
> hot dipped galvanizing over stainless?  A job we are working on has  
> a lot of welds and some of which are with stainless filler rod.  I  
> was wondering if the HDG will take onto the stainless?
> My other question is about pulse tig welding.  Any experience and  
> advice on settings?  The miller rep/tech said most guys just set  
> them at 25PPS, 80% peak and 25% background and leave them be.  The  
> pulse does seem to clean up the weld a bit or maybe I am just  
> getting better at TIG welding.  Any input would be great.
> Rob H.

Hi Rob
I can't help with the pulsed arc question as all I have ever done was  
scratch start DCEN.
I can only offer some insight regarding the HDG process.
Since HDG is a process similar to soft soldering in that the surface  
must be cleaned and degreased and then fluxed so that the solder  
(zinc) will adhere I believe that the process would be successful.
With good mechanical cleaning and the correct flux Stainless steel can  
be joined to copper or iron using any low temperature solder, ie  
50/50, 60/40, 95/5 or staysilv or the like. Might be more difficult if  
you had large areas of Stainless due to the lousy heat transfer of   
stainless and the resulting warping that may take place with  
relatively larger areas of dissimilar metals.
With some greater difficulty aluminum can be soft soldered to copper  
or stainless also. It's all in the surface prep and the flux. Some  
where I have the coupons from a copper soldering class sponsored by  
the copper institute. Let's just say that I was surprised myself with  
what could be soldered...
You might weld up a small sample and truck it over to you HDG shop and  
see if they can coat it. If they have done it before you are all set,  
but they might like to experiment with the process if they have not  
tried it as yet.
Let us know...
Thanks
-
Paul Sperbeck
No trees were killed in the sending of this message, but a large  
number of electrons
were terribly inconvenienced.

WB9HCO
jadap
"The difference between genius and stupidity is that
genius has its limits." -Albert Einstein
"Life is hard...it's harder if you're stupid" John Wayne - Sands of  
Iwo Jima

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