[TheForge] Galvanizing and stainless and TIG pulse settings.

[Paul]

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