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Old 04-14-2013, 03:10 PM   #1
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I have electrolysis all over my motorhome and no one knows how to stop or correct it please help.

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Old 04-14-2013, 03:18 PM   #2
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Brand of rig?
Type of siding?

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Old 04-14-2013, 04:09 PM   #3
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You can prevent galvanic corrosion it several different ways: 1) don't mix metals 2) use an electtrical insualtor between the two metals 3) coat or paint the metal that is less resistant 4) avoid the contact of the two metals with an electrolite (like water) 5) use cathodic protection I have an aluminum frame in our trailer and a couple of ideas I am using aluminum fasteners when possible, but I am trying a couple of other methods and monitoring problems (none yet). Stainless steel, galvanized and using pipe dope on the fasteners.
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Old 04-14-2013, 04:29 PM   #4
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Plugged in? Under large power lines? Next to a radio station transmitter? Current must be flowing. Using free standing charger??
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Old 04-14-2013, 07:30 PM   #5
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And probably no or inadequate chassis ground.
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Old 04-14-2013, 07:41 PM   #6
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Originally Posted by aslovesoft View Post
I have electrolysis all over my motorhome and no one knows how to stop or correct it please help.

Who made this diagnosis? What are you seeing. Where is it occuring ?
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Old 04-14-2013, 11:25 PM   #7
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If it has a steel frame and aluminium cladding and they have neglected to follow basic isolation procedures, you may end up with corrosion and blistering of the paint for several inches around each fastener. As far as I know, there is no way to stop it short of removing the cladding and doing the job properly.

I have an MC8 and the previous owner - supposedly a coach builder - reclad it with aluminium instead of the original SS. He skimped on the installation in places - especially the door - and there is blistering under the paintwork in many places.

BTW contrary to popular belief, stainless steel is not immune to electrolysis problems and some grades are worse than others.

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