plasma water pan rust inhibitor

[40fordcoupe]

I'm not sure if this is the right forum or not.
I'm planning a water pan for my CNC plasma table. I'm looking for information about additives for inhibiting rust that can be mixed with the water. Is anybody doing this and if so what are you using?
Thanks

[NC Cams]

Check with your plasma cutter to see if they have a recommendation - there might be seal/other issues with the pump to consider.

We use Valenite VNT700 in our grinder. It is water soluble and can be varried in strength for cutting or grinding. Does a GREAT job of rust inhibiting.

I dunno if it is suitable for a plasma cutter but we also use it for drilling, reaming, grinding, turning, plant watering (sic), you know pretty much everything around our shop....

[StealthDumpKits]

....are you trying to prevent the table from rusting, or the slag?

[Scott V]

I been using this for about a year. Excellent product for my cutting table.
http://automotive.henkel.com/Brands/...?ProductId=194

[40fordcoupe]

Originally Posted by StealthDumpKits ....are you trying to prevent the table from rusting, or the slag?

My primary interest is the pan and the grid, slag is secondary.

And thanks to all three of you for your input.
I book marked both of the product web sites you suggested.

[Weldtutor]

Your local welding supplier should be able to provide the water soluable oil as used to prevent rusting in water cooling systems for GTAW (TIG) welding.

[40fordcoupe]

Originally Posted by Weldtutor Your local welding supplier should be able to provide the water soluable oil as used to prevent rusting in water cooling systems for GTAW (TIG) welding.

Thanks I will check the next time I go there for something. They have got so they hide when they see me coming, because of my dumb questions.

[Geof]

When you go check the print on the container. It could be nothing more than automobile antifreeze (glycol based) at ten times the price. Antifreeze has rust inhibitors and would probably work fine.

[Scott V]

The stuff I use is nothing like my tig coolant.
It drys without a film. Tig coolant would not
work anywhere near as well. Get some RV water tank anti-freeze.
if you only want to protect the pan and not do this type
cutting. Which happens to add all sorts of capability
to a standard plasma unit. Think no warping or edge burn
off of tight lines/ thin pieces. No fan is needed for smoke or dust
when cutting like this.


http://video.google.com/videoplay?do...29880775100750

[40fordcoupe]

Originally Posted by Geof When you go check the print on the container. It could be nothing more than automobile antifreeze (glycol based) at ten times the price. Antifreeze has rust inhibitors and would probably work fine.

Thanks Geof, That is very interesting, My bandsaw is in an unheated building so I add antifreeze to the coolant it works just fine. I wasn't sure about the fumes from the glycol around the plasma torch since antifreeze does such nasty things to one's liver. Have you had any problems with fumes?

Originally Posted by Scott V The stuff I use is nothing like my tig coolant. It drys without a film. Tig coolant would not work anywhere near as well. Get some RV water tank anti-freeze. if you only want to protect the pan and not do this type cutting. Which happens to add all sorts of capability to a standard plasma unit. Think no warping or edge burn off of tight lines/ thin pieces. No fan is needed for smoke or dust when cutting like this.

Scott, Wow that video sure impresses me. There was no discoloration on what looked like stainless steel. I think that video deserves it's own thread. Anyway I would like to know a lot more about what you are doing and yes what are you adding to the water when you cut this way. Also it looks like the water is being blown away from the torch. Are you using a different cutting height or current setting.

Scott, Well Duh you all ready told me what you are using in an earlier post.
anyway thanks again for that great video.

Thanks to you both

[Geof]

I don't have a plasma unit I just know what is in antifreeze. But the RV tank antifreeze is a much better idea; it should be perfectly safe.

[Scott V]

Yes, I just add water.
I keep it at a certain level and usually subtract for different ga. (I use a bucket)
The tip blows a clear path around the arc. It does not matter if it's under water
a bit either. That was .035 stainless with no warping. The cut height is the same and so is the speed. Thin Aluminum works well too. It can warp worse then SS.