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I am seeing vast numbers of a new style of BBQ in the stores. Its basically a steel bucket. Ok so far. Problem is the muppets went and galvanised them. And anyone knows when zinc is heated it gives of zinc oxide vapour, a very nasty substance. Dont breath it and dont eat your burgers with a side order of zinc oxide.
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Save Red Admiral, Small Tortoiseshell, Peacock. Coma and Painted Lady butterflies. Dont cut stinging nettles in summer.
Only cut nettles grown in the shade. -
Never heard of zinc oxide vapour. What sort of temperature does it vapourise, because at 'room temperature' it is a solid?
So, 'anyone knows' doesn't seem to include me, and I got a good A level in Chemistry, quite a few years ago now but I doubt there is much I've forgotten!Flowers come in too many colours to see the world in black-and-white. -
907c.
Its the zinc that vapourises and ends up as the oxide.Save Red Admiral, Small Tortoiseshell, Peacock. Coma and Painted Lady butterflies. Dont cut stinging nettles in summer.
Only cut nettles grown in the shade.Comment
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You need very high temperatures to vaporize zinc - much higher than required to slow cook/smoke your food. I would have thought to achieve such high temperatures you would need to blast air through the charcoal - like in a furnace. If the zinc is vapourizing heaven knows what is happening to your burgers and chicken legs.Comment
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Why take the chance, theres plenty of un galvanised units out thereSave Red Admiral, Small Tortoiseshell, Peacock. Coma and Painted Lady butterflies. Dont cut stinging nettles in summer.
Only cut nettles grown in the shade.Comment
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I very much doubt zinc would vapourise at barbecue temperature. It probably wouldn't even melt! Zinc is a metal, they don't vapourise easily (apart from mercury).
PAINT is a much more direct risk, which is why if you buy a painted BBQ, the instructions tell you to burn off the paint before you use it for cooking (and that is why BBQs so often go rusty in a hurry, nothing to protect the iron/steel it is made from once the paint has gone).Flowers come in too many colours to see the world in black-and-white.Comment
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Disintegrating into a pile of ash................?Originally posted by rana View PostS*d the housework I have a lottie to dig
a batch of jam is always an act of creation ..Christine Ferber
You can't beat a bit of garden pornComment
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Zinc will easily melt at charcoal fire temps. I often make anodes for my boat on an open wood fire. And, take a look at a galvanised steel dustbin type incinerator after its been used for a few months , the zinc is burnt of in hotspot areas, wheres it gone ?.Vapourised. Just because temps at the griddle dont get too high doesnt guarantee there wont be hotspots lower down in the bucket where the charcoal sits in contact with the thin metal sides. Point an infrared thermometer at a glowing charcoal next time you have a barby, a bit of wind from the right direction and you could easily reach spots of 1000c. Ive had a cheap, made in India cast iron job for 20 years, put a little oil on the grill after use and no problem with rust. Anyway I definately wont put my food near any hot galvanising.Save Red Admiral, Small Tortoiseshell, Peacock. Coma and Painted Lady butterflies. Dont cut stinging nettles in summer.
Only cut nettles grown in the shade.Comment
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Originally posted by Sheikh Yerboutti View Post
The same thought had occurred to me... my galvanised steel dustbin burner had no galvanising left after its first 15 minute trial burn - and that was just paper and a few bits of wood!!!!!
Charcoal is used to smelt iron and gets much hotter!Last edited by teakdesk; 15-06-2010, 12:59 AM.The proof of the growing is in the eating.
Leave Rotten Fruit.
Nitrogen, Phosphorus, Potasium - potash.
Autant de têtes, autant d'avis!!!!!
Il n'est si méchant pot qui ne trouve son couvercle.Comment
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Zinc may (indeed probably will) oxidise at those temps, (not necessarily melt) but that doesn't mean there would be any vapour given off. If it DID melt, it STILL wouldn't be likely to give off vapour!Originally posted by Sheikh Yerboutti View Post
Zinc oxide won't stick to the underlying iron like the metal does, that is why it vanishes when oxidised. Metals DO NOT vapourise that readily!Flowers come in too many colours to see the world in black-and-white.Comment
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Hilary, google " cooking on galvanised equiptment" and tell the hundreds of other people theyre wrong.Save Red Admiral, Small Tortoiseshell, Peacock. Coma and Painted Lady butterflies. Dont cut stinging nettles in summer.
Only cut nettles grown in the shade.Comment
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Having traveled to third world countries where it is traditional to use a charcoal filled galvanized bucket arrangement for everyday cooking I have not noticed any long term concern over health problems with zinc poisoning. Is it something these communities should be warned about ?Comment
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Pretty much anything is a health hazzard in those places, they dont seem too bothered about health/safety periodSave Red Admiral, Small Tortoiseshell, Peacock. Coma and Painted Lady butterflies. Dont cut stinging nettles in summer.
Only cut nettles grown in the shade.Comment
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I looked up a few. Plenty said not to use it for cooking in, because zinc CAN dissolve in cooking liquids (and quite true, especially don't put anything even remotely acidic in a galvanised container, even freezing cold). The only one I came to that mentioned galvanised stove, suggested simply using plenty of ventilation, which with a BBQ, applies anyway. I know basic (A level) chemistry. Metals and their oxides do NOT readily vapourise!Originally posted by Sheikh Yerboutti View PostFlowers come in too many colours to see the world in black-and-white.Comment
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Plenty said dont put meat on galvanised grills like that barby.Save Red Admiral, Small Tortoiseshell, Peacock. Coma and Painted Lady butterflies. Dont cut stinging nettles in summer.
Only cut nettles grown in the shade.Comment
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