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07-02-2018, 05:23 PM | #1 |
Not Yet Wild
Join Date: Aug 2014
Posts: 26
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Extreme corrosion on battery terminals
My electric Toro Workman was bought second hand with at set of 8 Trojan T145 batteries with ELPT terminals. I've been having issues with the battery terminals getting a build-up of material that seems to come from corrosion:
I've had several terminals completely corrode through and cause an open circuit in the battery. To try and solve the issue I've cleaned the terminals, replaced all cables, adjusted water levels on the batteries and installed the cables with a torque wrench to get an exact torque specification. This only happens in some of the terminals and I suspect the previous owner may have over-torqued the bolts and damaged some of the terminals. Does anyone have some other suggestion on how to fix this without just buying a new set of batteries? |
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07-02-2018, 07:09 PM | #2 |
Not Yet Wild
Join Date: Aug 2014
Posts: 26
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Re: Extreme corrosion on battery terminals
Doing some research on how to clean my batteries better I watched in horror a bunch of youtube videos that simply hose down the battery tops. Is this really something that can be done? Isn't adding a bunch of water just shorting all the batteries to one another? The Trojan video uses just little bits of baking soda solution and then little bits of water, section by section. But if I can just turn on the garden hose that makes things much easier.
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07-02-2018, 11:52 PM | #3 |
British born Nincompoop
Join Date: Feb 2007
Location: United Kingdom
Posts: 2,461
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Re: Extreme corrosion on battery terminals
Yep, Baking soda solution to neutralise the acidity, rinse and dry with airline, hairdryer or similar.
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07-03-2018, 05:56 AM | #4 |
Not Yet Wild
Join Date: Aug 2014
Posts: 26
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Re: Extreme corrosion on battery terminals
If anyone is curious like I was thinking water conducts electricity something like 10^10 (10 billion) times worse than copper:
https://en.wikipedia.org/wiki/Electr...ious_materials Suddenly rinsing batteries with a garden hose doesn't sound as crazy |
05-02-2019, 05:29 PM | #5 |
Not Yet Wild
Join Date: May 2019
Location: Australia
Posts: 33
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Re: Extreme corrosion on battery terminals
I clean them with a wire brush, rinse with water, dry thoroughly, and then spray them with fish oil, seems to help.
Since went to lithium but it kept the lead acid battery terminals looking good at the time. |
05-02-2019, 08:23 PM | #6 |
Gone Wild
Join Date: Jul 2016
Location: Charlotte NC
Posts: 1,165
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Re: Extreme corrosion on battery terminals
As others have suggested clean tight connections should not grow mushrooms like you have.
I mix 1/2 cup of baking soda in a quart of water, and use a throw away paint brush to clean the battery tops and the terminals, and cables. Rinse off with clear water and dry if desired. Never had any problems and they stay clean. You may have corrosion inside the terminal lug on the cable itself. You might want to replace the cable, or cut off the lug and replace it. Aflyer |
05-02-2019, 08:41 PM | #7 |
Gone Insane
Join Date: Oct 2016
Location: Richmond, VA
Posts: 14,214
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Re: Extreme corrosion on battery terminals
Good advice. I use those $1 throw away toilet brushes from the Dollar Store.
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05-08-2019, 11:13 AM | #8 |
Gone Wild
Join Date: May 2011
Location: Pittsburgh
Posts: 2,943
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Re: Extreme corrosion on battery terminals
I find this (or similar) helpful
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05-08-2019, 01:03 PM | #9 |
Stay thirsty my friends!
Join Date: Jan 2007
Location: Suburban Chicago
Posts: 24,284
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Re: Extreme corrosion on battery terminals
To any newbies reading this be sure to DISASSEMBLE the terminals before cleaning efforts begin, or the corrosion will return very quickly.
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