Elca Branman on sat 23 sep 00
When I salt fired, we drilled a hole in our soft brick kiln, and i made
a tube that was closed at the end that went into the kiln, almost like a
clay condom. As i remember, it was stoneware clay i used.
The thermocouple went into the tube which went into the kiln
I would NOT put a thermocouple directly into a salt firing
...> to tell me wether the thermocouple rod will erode with
> saltfumes in my kiln.
> i need some advice on that. does the thermocouple get
> corroded because of the corrosiveness of the salt
> glazing or salt fumes.
>
> thanks
> vivek patel
>
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Elca.. at home in Sarasota,Florida,USA
elcab1@juno.com
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vivek patel on sat 23 sep 00
hi i am posting this question to anyone who can help
me.
recently ive bought a thermocouple for my downdraft
kiln in india. Now my problem is that nobody here
including the manufacturer of the thermocouple is able
to tell me wether the thremocouple rod will erode with
saltfumes in my kiln.
i need some advice on that. does the thermocouple get
corroded because of the corrosiveness of the salt
glazing or salt fumes.
thanks
vivek patel
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Send instant messages & get email alerts with Yahoo! Messenger.
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philrogers pottery on sat 23 sep 00
Hi Vivek,
The short answer to your question is Yes. Paint your thermocouple sheath
with high alumina wash,
3 Alumina Hydrate
1 Ball clay or kaolin.
Repeat this every other firing or so.
Phil Rogers.
Phil and Lynne Rogers,
Lower Cefn Faes,
RHAYADER.
Powys. LD6 5LT.
Tel/fax. (44) 01597 810875.
philrogers@ntlworld.com
----- Original Message -----
From: vivek patel
To:
Sent: Saturday, September 23, 2000 5:35 PM
Subject: can a thermocouple rod get eroded with corrosive salt fumes
> hi i am posting this question to anyone who can help
> me.
> recently ive bought a thermocouple for my downdraft
> kiln in india. Now my problem is that nobody here
> including the manufacturer of the thermocouple is able
> to tell me wether the thremocouple rod will erode with
> saltfumes in my kiln.
> i need some advice on that. does the thermocouple get
> corroded because of the corrosiveness of the salt
> glazing or salt fumes.
>
> thanks
> vivek patel
>
> __________________________________________________
> Do You Yahoo!?
> Send instant messages & get email alerts with Yahoo! Messenger.
> http://im.yahoo.com/
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
vince pitelka on sat 23 sep 00
> hi i am posting this question to anyone who can help me.
> recently ive bought a thermocouple for my downdraft
> kiln in india. Now my problem is that nobody here
> including the manufacturer of the thermocouple is able
> to tell me wether the thremocouple rod will erode with
> saltfumes in my kiln.
> i need some advice on that. does the thermocouple get
> corroded because of the corrosiveness of the salt
> glazing or salt fumes.
Vivek -
Yes, the salt atmoshpere will quickly ruin your thermocouple. The simple
solution, which is also used on wood kilns and reduction kilns, is to
enclose the thermocouple in a porcelain sheath. With porcelain clay, make a
shape like a laboratory test-tube - long and slender, rounded on the closed
end, so that the thermocouple will fit inside it. Make sure the sheath is
long enough to go through the refractory on your kiln and into the firing
chamber at least three inches. When you insert the thermocouple in the
sheath, be sure to seal around the outer opening in the sheath around the
thermocouple with some ceramic fiber, or else the readings will not be
accurate. When you make changes in the burners or damper which affect
temperature, the thermocouple will respond slightly slower inside the
sheath, but at least it will last a long time.
Good luck -
- Vince
Vince Pitelka
Home - vpitelka@dekalb.net
615/597-5376
Work - wpitelka@tntech.edu
615/597-6801 ext. 111, fax 615/597-6803
Appalachian Center for Crafts
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
http://www.craftcenter.tntech.edu/
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