[TheForge] pot

[Peter Fels & Phoebe Palmer]

My guess is that the thermal stresses would prohibit plasma arc spray deposition.
It's brittle stuff and needs to be matched to the thermal expansion rate of the substrate as well as annealed.

On Nov 26, 2012, at 12:30 PM, Mike Spencer wrote:


ries wrote:

> the original black with speckles coffee pots, or stove doors, were
> actual glass frit, baked in oven til they fused into one continuous
> sheet of real vitrious enamel.

Yeah, I know. We have a "cowboy coffee pot" of the type under
discussion and actually use some other pieces of enamelware.  And I've
done a little (very amateur) hobby enameling.

> Car manifolds are sometimes "enamelled"- but its paint. POR 15 is
> popular, and its often called enamel, but its nothing like molten
> glass.

I have a vague recollection of seeing an exhaust manifold that had what
appeared to be proper glass enamel coating, back when I was doing car
stuff in the early 70s. I might  misremember or have been mistaken
then. 

In any event, plasma arc spray is not going to apply anything that
could reasonably be called "paint".  Here's a place where you can
order (allegedly) vitreous enamel-coated steel panels for your next
subway or air terminal project:

http://www.tjskl.org.cn/products-search/cz50b9562/vitreous_enamelled_steel_panel-pz5d1bbe4.html


I haven't found anything about small businesses using vitreous enamel
or ceramic plasma arc spray or anybody advertizing the gear to small
operations so maybe it's a process that's way too costly for anybody
except major industrial players.  Dunno. Lacking first-hand knowledge,
it always seemed like a handy process to me.


- Mike

-- 
Michael Spencer                  Nova Scotia, Canada       .~. 
                                                          /V\ 
mspencer at tallships.ca                                     /( )\
http://home.tallships.ca/mspencer/                        ^^-^^

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