Good Sam Club Open Roads Forum: Water heater, anode rod, electrolysis, and teflon tape
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 > Water heater, anode rod, electrolysis, and teflon tape

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lwbfl

Florida Panhandle

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Posted: 04/15/21 07:15pm Link  |  Quote  |  Print  |  Notify Moderator

BCSnob wrote:

lwbfl wrote:

.....small positive charge attached to the anode, negative lead attached to the piece being cleaned.

Doesn’t this simply provide the current (electrons) needed to balance the ion flow in the solution (in place of directly electrically connecting the two metal pieces) and help drive the desired electrochemical reaction?


Sure it does, speeds the process and controls the flow, but there is no direct "electrical connection" for the same process, they are not screwed together like the element and the tank. The charge and solution simply quicken the reaction, they do not cause it. The point (well confused by this point)is that two metals can be isolated from each other and still be effected by electrolysis.


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ScottG

Bothell Wa.

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Posted: 04/15/21 07:23pm Link  |  Quote  |  Print  |  Notify Moderator

Hard to imagine a retired EE (like myself) not just using a DVM to verify continuity. I have done just that and even with 3 wraps of teflon tape, there is still zero ohms to chassis (tank). Same with pipe dope.

BCSnob

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Posted: 04/15/21 07:25pm Link  |  Quote  |  Print  |  Notify Moderator

What you’re describing is an Electrolytic cell (see link in previous post). However, current still needs to flow between the two metals in addition to ion flow through the solution; if that current is not provided directly or via an external current source (battery) the desired electrochemical reaction at the anode rod (and prevention of the oxidation at the heater metal) doesn’t occur.

mowermech

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Posted: 04/16/21 07:21am Link  |  Quote  |  Print  |  Notify Moderator

I'm lucky. My water heater has a plastic plug, no anode rod, so I do not have to worry about how it works.


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BCSnob

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Posted: 04/16/21 07:28am Link  |  Quote  |  Print  |  Notify Moderator

Our household hot water storage tank (the heater is out in the sunshine) doesn’t have an anode rod; it’s lined with cement.

lwbfl

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Posted: 04/16/21 01:09pm Link  |  Quote  |  Print  |  Notify Moderator

mowermech wrote:

I'm lucky. My water heater has a plastic plug, no anode rod, so I do not have to worry about how it works.


My new one does too, YAY!

BCSnob

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Posted: 04/16/21 01:29pm Link  |  Quote  |  Print  |  Notify Moderator

Aluminum tanks don’t need an anode rod.

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