Good Sam Club Open Roads Forum: Class A Motorhomes: Battery Cable Corrosion
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SGTJOE

Utah

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Posted: 08/30/20 04:43pm Link  |  Quote  |  Print  |  Notify Moderator

Yep, that's it.


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SGTJOE

Utah

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Posted: 08/31/20 12:58pm Link  |  Quote  |  Print  |  Notify Moderator

I've had the MH plugged into 50amp at my house since mid Dec. Do you think this might be why I have corrosion on the main positive cable, but not on the battery terminal?

DrewE

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Posted: 08/31/20 03:09pm Link  |  Quote  |  Print  |  Notify Moderator

SGTJOE wrote:

I've had the MH plugged into 50amp at my house since mid Dec. Do you think this might be why I have corrosion on the main positive cable, but not on the battery terminal?


Nope. The main reason is that they're made out of different materials: the conductor in the cable is copper, while the battery terminal is lead, with probably stainless steel threaded bits if it has any.





time2roll

Southern California

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Posted: 08/31/20 05:04pm Link  |  Quote  |  Print  |  Notify Moderator

The fluffy white stuff is generally lead-sulfate or copper-sulfate.
The sulfate is from the sulfuric acid combining with the metal.
Just a small drop is all it takes. The crimps do not look sealed.
The sulfate is water soluble and the free ions neutralized with baking soda.
Possible the issue has been lurking within the strands for some time and has just recently pushed out.
Yes it does seem odd just to be back in the wire. Usually if the terminal has lost the seal to the case the terminal is first to go. Otherwise I assume the last service somehow got just a touch of acid on that point.


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