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10-26-2014, 07:53 AM
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#21
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Dazed & Confused
Join Date: Sep 2014
Location: NW PA
Posts: 380
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It isn't often used, but the actual name is sacrificial anode. The whole reason for the anode is to protect the tank from corrosion. Magnesium is less noble than steel and will give itself up, corrode to protect the steel.
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~Mike & Kim~
2014 Rockwood Windjammer 3008W Diamond Package
2020 Ram 2500 6.4L Crew cab 4WD, 4.10 Axel
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10-26-2014, 08:09 AM
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#22
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Senior Member
Join Date: Jul 2010
Location: Waynesville
Posts: 14,428
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Quote:
Originally Posted by MEHoffman
It isn't often used, but the actual name is sacrificial anode. The whole reason for the anode is to protect the tank from corrosion. Magnesium is less noble than steel and will give itself up, corrode to protect the steel.
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I though that (Electrolysis) came into play here also? Youroo!!
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10-26-2014, 08:30 AM
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#23
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Dazed & Confused
Join Date: Sep 2014
Location: NW PA
Posts: 380
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Quote:
Originally Posted by youroo
I though that (Electrolysis) came into play here also? Youroo!!
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Electrolysis is what causes the corrosion. You protect the metal structure, in this case a water heater, via cathodic protection which can be either a sacrificial anode or an impressed current system. Anodes give up themselves and must be periodically replaced. Sacrificial anodes are used on some buried structures, but more often current is impressed onto the buried structure, say a pipeline, to keep current from flowing off of the pipe. Where the current flows off, steel is slowly removed and a pit, corrosion, is formed.
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~Mike & Kim~
2014 Rockwood Windjammer 3008W Diamond Package
2020 Ram 2500 6.4L Crew cab 4WD, 4.10 Axel
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10-26-2014, 08:55 AM
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#24
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Senior Member
Join Date: Apr 2014
Posts: 643
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Quote:
Originally Posted by Yarome
You can always just run some steel wool over it before you reinstall it, but that doesn't do much down in the pits. KWIM
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I'd be hesitant using steel wool. It will leave behind metal filings that will rust. Something like a ScotchBrite pad would be better since it is not corrosive.
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10-26-2014, 09:20 AM
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#25
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Senior Member
Join Date: Mar 2014
Location: Eastern Ontario
Posts: 495
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Quote:
Originally Posted by asquared
Ok so this is still ok and not in need of replacing?
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It is OK and normal.
Your good for a few more season if it doesn't wear off any quicker.
Just need to do a good HWT flush to clear all the sediments from the bottom.
Just run the water with the anode remove and insert a small brush, or a long piece of wire inside to help clean everything out.
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Black
2014 Ford F250 Lariat SuperCrew 4x4 tuxedo black
2015 Rockwood Signature 8310SS Diamond Edition
***3rd GENERATION EGG FARMER***
***WHO MADE YOUR EGGS TODAY ?
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10-26-2014, 01:36 PM
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#26
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Moderator Emeritus
Join Date: Dec 2012
Location: North Carolina
Posts: 11,069
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All good info to know. I feel like I have just gone back to high school science class.
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2014 Crew Cab Chevy Silverado 3500 4wd Duramax/Allison
2014 Sabre 34REQS-6
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10-27-2014, 08:52 AM
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#27
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Senior Member
Join Date: Jul 2010
Location: Waynesville
Posts: 14,428
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Quote:
Originally Posted by MEHoffman
Electrolysis is what causes the corrosion. You protect the metal structure, in this case a water heater, via cathodic protection which can be either a sacrificial anode or an impressed current system. Anodes give up themselves and must be periodically replaced. Sacrificial anodes are used on some buried structures, but more often current is impressed onto the buried structure, say a pipeline, to keep current from flowing off of the pipe. Where the current flows off, steel is slowly removed and a pit, corrosion, is formed.
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Is it really (Corrosion or Erosion)? The Arod (Erosion) slows/stops the (Corrosion) of the Water tank? Youroo!!
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10-27-2014, 09:11 AM
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#28
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Moderator Emeritus
Join Date: Oct 2014
Posts: 1,024
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It's not recommended to leave the anode rod out during the winter because both the tank and the threads are steel and can rust which could make it difficult to seat in the Spring. (I've never witnessed this, though, but I've never taken mine out except to drain the water and I do wrap well with teflon tape whenever the old stuff is looking worn....usually once a year.)
I think my anode rod became a Christian this summer...he's looking awful holy now! ;-)
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Rick & Karen
(Retired USAF, MSgt)
Monument, Colorado
8-year Travel Trailer RVers
2013 Forest River Rockwood Ultra-Lite 2904SS
2014 Toyota Tundra Maxcrew SR-5 TRD 4x4 (with Firestone airbags in the rear)
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10-27-2014, 05:31 PM
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#29
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Moderator Emeritus
Join Date: Dec 2012
Location: North Carolina
Posts: 11,069
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After thinking about it, since the fiver is going back to the factory I actually decided the safest place for it was back in the tank. Thanks again for the responses.
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2014 Crew Cab Chevy Silverado 3500 4wd Duramax/Allison
2014 Sabre 34REQS-6
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