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Topic: Galvanized oven no-no >was Re: +Drum perf size question (6 msgs / 133 lines)
1) From: Mike McGinness
From: "Ed Needham" 
<Snip>
Rats, I seem to recall galvanized was discussed for drums but forget the
problem. Wasn't paying enough attention I guess. Suspect chemical reaction
giving off toxic gas? Could it be burned off the inner *oven* surface or
painted over with high-temp paint?
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
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2) From: jim gundlach
The galvanized coating would not be safe by simply covering with 
high-temp paint.  However, I don't think I've seen a galvanized mail 
box in over twenty years.  Half of them are now made of plastic.  The 
metal ones are usually painted black, silver, or white.  Sandblast the 
paint off and you should be ok.
    Jim Gundlach
On Thursday, February 6, 2003, at 12:14 AM, Mike McGinness wrote:
<Snip>
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3) From: floyd burton
Galvanized=zinc and all kinds of other heavy metals-a real witches
brew-roasting temps can release that stuff.  Bad news.  Cold rolled steel is
cheap and easy to use for drum material.  Develops kind of a gold patina
after roasting.  Have 1/8" holes in my drum and no stuck beans.  By accident
I have a slight gap both ends of the drum and the a lot of chaff falls out
during roasting and that is good IMHO.  All that comes out of the holes is
smoke.  There are some tiny beans out there.

4) From: Ed Needham
I personally would not want galvanized on the roaster where gas fumes could
be released, rubbed off, or otherwise work it's way into my beans or lungs.
There was speculation here that the roasting temps were not sufficient to
release anything toxic, but I'm not convinced.  Food prep equipment standards
prohibit materials like galvanized sheet.
Maybe there is a yuppie stainless mailbox from Sharper Image or something
.
Ed Needham
To Absurdity and Beyond!http://www.homeroaster.comed
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5) From: Mike McGinness
From: "Ed Needham" 
 Maybe there is a yuppie stainless mailbox from Sharper Image or
something
<Snip>
I'd actually thought of looking in places like that! Warped, I mean Great,
minds think alike:)
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

6) From: john kangas
That stuff's either zinc or cadmium or both. It's possible to get a case of 
"metal fever" even just handling enough galvanized stuff in a day. Short 
term effects, it's like food poisoning, long term, it'll burn out a kidney 
or two. Definitely not something to have around food.
John Kangas
<Snip>
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