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Old 06-03-2012, 07:31 AM   #31
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Pan under water heater is corroding?


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Originally Posted by oh'mike View Post
This is that damnedest thread--the pan serves no useful purpose--it's old and rotten--so replace it with one that doesn't leak and be done with it--

what difference does it make why a thin galvanized pan corroded?
Ha! good point! thanks

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Old 06-03-2012, 07:35 AM   #32
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Pan under water heater is corroding?


Homerepairguy, Boric Acid is not going to eat through, nor is Sodium Borate, through that pan, if there ever was a capacitor per chance behind the cover plate leaking. Also, the acids used in Cap's is not corrosive, most are sugar based and used in foodstuffs. Majority of the solution is oil based in large size cap's, smaller sized, there is not enough of the "acid" in there to do anything.
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Old 06-03-2012, 10:01 AM   #33
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Pan under water heater is corroding?


I'm also in the replace it or patch it camp, (and being on a slab I would lean to patching, because I'm lazy ) but I would drop a cup of water in the pan to see if that's the natural low point for any water to collect.
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Old 06-03-2012, 11:22 AM   #34
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Tribe fan, just get rid of the pan all together. My water heater sits about ten feet from the floor drain, and I never think about putting it in a pan.

You are worrying too much about a little thing that really does not matter, nor does it affect the performance of the appliance.
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Old 06-03-2012, 01:01 PM   #35
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Pan under water heater is corroding?


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Homerepairguy, Boric Acid is not going to eat through, nor is Sodium Borate, through that pan, if there ever was a capacitor per chance behind the cover plate leaking. Also, the acids used in Cap's is not corrosive, most are sugar based and used in foodstuffs. Majority of the solution is oil based in large size cap's, smaller sized, there is not enough of the "acid" in there to do anything.
Huh? Here's some webpages that say leaking electrolyte can damage metal traces on circuit boards:

http://console5.com/wiki/Identifying_Bad_Capacitors
Defective capacitors tend to go out of tolerance quickly, leak, or sometimes explode. These systems should have their capacitors preemptively replaced to prevent damage to surrounding components and traces.
Also, there are photos that show circuit board damage on this webpage.

http://gencom64.blogspot.com/2011/03...ve-repair.html
After years of the electrolyte leaking the corrosion begins to eat away at the traces on the circuit board, and cause damage to nearby circuit board components. As you can see in this picture, the leaking capacitor has spewed electrolyte all over the surrounding area causing traces to be eaten as pointed out with the arrow.

http://radcomms.net/Standard_C528.html
The leaking capacitors had caused damage ranging from discoloured silk screening on the PCB's to actual copper tracks being dissolved or corroded beneath the capacitors.

http://forum.lowyat.net/topic/341368/all
Venting is typically messy, and the acidic electrolyte must be cleaned off the motherboard to prevent further damage.
Furthermore, recapping a motherboard does not guarantee its revival as neighboring components can be damaged by leaked electrolyte ....snip

http://www.amiga.org/forums/archive/...p/t-57791.html
I don't see the leakage in that picture (perhaps you already cleaned it up?) but the short answer is yes, if a capacitor has leaked electrolyte onto the PCB then it can cause some damage. The electrolyte is corrosive, so it can eat away at PCB tracks etc.

But we are diluting the original poster's thread so I'll bow out of this leaking capacitor causing corrosion discussion. If you don't believe that leaking electrolyte from an electrolytic capacitor can cause corrosion, then that's fine.

HRG
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Old 06-03-2012, 01:09 PM   #36
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Pan under water heater is corroding?


Gregzoll - no argument here. I just took the lazy way. If pan has no where to drain I would just leave it alone myself.
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Old 06-03-2012, 10:46 PM   #37
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Pan under water heater is corroding?


If you decide to use fiberglass resin to repair it please be aware that it is flammable. Turn off the pilot light on the water heater and any other sources of ignition until everything is cured and all vapors are gone.
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Old 06-04-2012, 03:56 PM   #38
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Pan under water heater is corroding?


Looks like corrosion from moisture coming up throught he concrete floor.
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Old 06-04-2012, 07:55 PM   #39
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Pan under water heater is corroding?


I say we all pool our money and send that pan to a metallurgist and get to the bottom of this mystery!
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Old 06-05-2012, 10:22 AM   #40
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Pan under water heater is corroding?


in the event of such a mystery, do some diagnosing if you really care that much. for example, turn the pan a bit and put a piece of plastic underneath the pan in the exact spot on the concrete where the corrosion was happening. if the corrosion does not re-occur, it is not the concrete. you can also put something above the area to see if anything is dripping down, that will show up relatively quickly.

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