Anyone tried this anti scale compound?

I will wait till some1 reports how this liquid anti-scaling compound
behaves with air-hardening steels - both the protection and removal
of it after HT . I know that removal can be a real PITA.

For now, I am at peace with foil :) . It is a hassle, you can get cut,
but the results are predictable and you're not risking ruining a part
you worked on so hard.
 
Has anyone with an electric HT oven tried flooding it with argon or nitrogen. Nitrogen would be cheapest. If the oven has a stainless skin and is fairly tight you should be able to heat it up flood it with inert gas then use a flow valve from a tig or wire welder to keep a trickle of inert gas flowing into to the chamber and keep the atmosphere intert. A small chamber with dimentions like thoses talked about in this thread would not require that much gas. Hmmm maybe you could just crack the flow valve and allow it to run during the ovens preheat. No oxgen=no scale or decarb right?
 
Some folx did use this very method. You want inert gas with atomic
weight above oxygen - so it displaces the oxygen andstays within the oven. Oven needs to be air-tight nuff and preferably of top-load type.

You only need to let the gas in @ around 1400F - that's when the decarb
starts. No need to flood it when the oven is coming up to the temp.

Now, hot interior of the oven will increase molecular speed of the gas inside
very significantly, so it will try to escape like crazy. But, keeping the gas flowing @ few CFPH should take care of it.

For yet unknown reason (laziness ?) , I am yet to try this method, although
I have inert gas, flow meter and an oven :)
 
I know that some commercial HT services use the inert gas. Argon is way heavier than O2 and nitrogen is just slightly lighter. Argon is fairly expensive. I was thinking about starting the flow of gas early to displace all the 02 prior to hitting the decarb temp and even if the increased temp increases the molecular speed it should be very difficult for oxgen to enter the vessel while the inert gas inside is expanding and flowing outward.
 
Don Fogg turned me onto the stuff over a year ago.He was using it before Brownell's was carrying it.I like it and its water based.I think the spraying method would be mostly an industrial type application requiring special spraying equipment. I just use a cheapo paint brush. I also mix it half and half with satanite if I am going for hamon.(Just to thicken it up)
 
I have a pint of the stuff coming from AdvancedTechnical products out of Cincinnati. It was said by someone on the forum that it was the same stuff as what Brownells carries. I called them direct 513-851-6858 and they were fabulous to deal with, very informative. I don't know what Brownells sells the stuff for, but I only paid something like $12.20 a pint!:eek: Can't wait to try it on some CPM154
Matt Doyle
 
Please post your experience with it, when you get it. Me too got pretty excited when they released PBC Special - rated to 2000F. What I quickly discovered is that tiniest of uncovered areas equals a disaster, when heat treating @ 1750+F

AND that removal of the compound after HT is an absolute b1tch ! So much so that I don't use it anymore. Foil is 100% fool proof and at expense of an occasional cut, you get good results every time.

BTW, the foil is inexpensive too - get if from Brownells, the price can not be beaten. 24" x 5F long roll is something like $20 methinks.
 
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