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I just learned water heaters have an "anode" and its important davidlaska 06-08-2007
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Posted by George on June 10, 2007, 9:01 am
Ook wrote:
>>>> Labor can't replace material. Its called a "sacrificial" anode for a
>>>> good
>>>> reason. See here:
>>>>
<http://www.waterheaterrescue.com/pages/WHRpages/English/Longevity/water-heater-anodes.html>
>>>>
>>>> --
>>>> Grandpa
>>> Why do they call it an anode?
>> http://en.wikipedia.org/wiki/Anodes
>>
>
> I know what an anode is. I also know what a cathode is. But that doesn't
> answer my question....I stick this rod in the middle of my water heater -
> what makes it an anode, and not a cathode?
>
>
If you know what an anode is it is totally obvious why the water heater
anode isn't a cathode.

Posted by Larry W on June 10, 2007, 11:24 pm
>Ook wrote:
<...snipped...>
>> I know what an anode is. I also know what a cathode is. But that doesn't
>> answer my question....I stick this rod in the middle of my water heater -
>> what makes it an anode, and not a cathode?
>>
>>
>If you know what an anode is it is totally obvious why the water heater
>anode isn't a cathode.


Obvious to you and me perhaps. If the rod was made of copper or gold, what
would it be?


--
Better to be stuck up in a tree than tied to one.

Larry Wasserman - Baltimore Maryland - lwasserm(a)sdf. lonestar.org

Posted by Eigenvector on June 10, 2007, 11:51 pm

>>Ook wrote:
> <...snipped...>
>>> I know what an anode is. I also know what a cathode is. But that doesn't
>>> answer my question....I stick this rod in the middle of my water
>>> heater -
>>> what makes it an anode, and not a cathode?
>>>
>>>
>>If you know what an anode is it is totally obvious why the water heater
>>anode isn't a cathode.
>
>
> Obvious to you and me perhaps. If the rod was made of copper or gold, what
> would it be?
>
>
I don't understand the relevance of your post. Gold isn't useful as anodic
protection, and I don't even think copper is either in this particular
situation. But what does that have to do with cathodic protection?
Cathodic protection involves the application of electricity to the object,
whereas the current supplies the electrons that normally would be obtained
from the iron in converting iron to iron oxide. In anodic protection the
electrons that normally would be taken from the iron to form iron oxide are
instead taken from the anode - hence the use of something easy to oxidize
like aluminum or zinc.



Posted by Grandpa on June 11, 2007, 12:04 am
Larry W wrote:
>> Ook wrote:
> <...snipped...>
>>> I know what an anode is. I also know what a cathode is. But that doesn't
>>> answer my question....I stick this rod in the middle of my water heater -
>>> what makes it an anode, and not a cathode?
>>>
>>>
>> If you know what an anode is it is totally obvious why the water heater
>> anode isn't a cathode.
>
>
> Obvious to you and me perhaps. If the rod was made of copper or gold, what
> would it be?
>
>
In a water heater, they would be called a "rod" offering no protection.
--
Grandpa

Posted by davidlaska on June 23, 2007, 12:30 pm
On Jun 9, 2:10 pm, "Ook" <Ook Don't send me any freakin' spam at
zootal dot com delete the Don't send me any freakin' spam> wrote:
> >>> Labor can't replace material. Its called a "sacrificial" anode for a
> >>> good
> >>> reason. See here:
> >>> <http://www.waterheaterrescue.com/pages/WHRpages/English/Longevity/wat...>
>
> >>> --
> >>> Grandpa
>
> >> Why do they call it an anode?
>
> >http://en.wikipedia.org/wiki/Anodes
>
> I know what an anode is. I also know what a cathode is. But that doesn't
> answer my question....I stick this rod in the middle of mywater heater-
> what makes it an anode, and not a cathode?

Thank you very much for the perfect link, now I know what a worn out
anode looks like, the key to my problem. There was an old water
heater I pulled an anode from, the water heater was old, but never
used.


Page 3 of 8       < 1 2 3 > last >>
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