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Battery Acid Damage


 
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Mark Schrier
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Joined: 13 Jun 2013
Posts: 68
Location: Washington State

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PostPosted: Sun Jul 28, 2013 10:18 am    Post subject: Battery Acid Damage Reply to specific post Reply with quote

I have been doing some preventative painting on the 8N. Not to make her a trailer queen but I would like to do my part in preserving her for another 64 years.

The battery tray is pretty much toast and here is a picture of the damage to the cast iron below it. I don't plan on tearing it down any further, so my thinking is to apply some naval jelly and then spray it with rusty metal primer and finish paint.



Just wondering if anyone else has a better method for cleaning this up.

Thanks,

Mark
 
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Bob
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PostPosted: Sun Jul 28, 2013 10:45 am    Post subject: Re: Battery Acid Damage Reply to specific post Reply with quote

If you want to smooth it out a little, after neutralizing the acid and removing the rust, mix up some JB Weld and smear it over the rough area with a body putty spreader.

If you want to maintain some sand-cast iron look, press some coarse sandpaper against the JW Weld as it is firming up.


 
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Tom N MS
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PostPosted: Sun Jul 28, 2013 11:52 am    Post subject: Re: Battery Acid Damage Reply to specific post Reply with quote

My Nephew has used OSPHO on rusty stuff. Available at Ace Hardware..H showed me where he had used it on a gooseneck trailer.. Looked like rust had never been there..Said he has seen it used and not even paint over it and it has lasted for years..Of course after application of whatever rust killer you choose, yours will need some filling like Bob mentioned.
 
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36 Coupe
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PostPosted: Sun Jul 28, 2013 2:51 pm    Post subject: Re: Battery Acid Damage Reply to specific post Reply with quote

This is the result of over charging.Keep the charge under 10 amps.
 
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Bob Harvey
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PostPosted: Sun Jul 28, 2013 5:17 pm    Post subject: Re: Battery Acid Damage Reply to specific post Reply with quote

Give the area a bath with soapy water, rinse, let dry and apply paint of your choice. We are not walking down the runway scantily clad ! Yipes !!
 
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heybusdriver
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Joined: 25 Nov 2000
Posts: 872
Location: Surrey B.C. Canada

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PostPosted: Sun Jul 28, 2013 8:31 pm    Post subject: Re: Battery Acid Damage Reply to specific post Reply with quote

I just used a angle grinder with a wire brush ,
cleaned it up and repainted with a thick coat of
paint.


Stan
9N 222933
2N with 8N motor 8N345567
8N 146710
8N 179555
8N 197904
8N 199000
8N 254079
8N 362039
 
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showcrop
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PostPosted: Mon Jul 29, 2013 4:13 am    Post subject: Re: Battery Acid Damage Reply to specific post Reply with quote


As others have said, naval jelly or whatever rust killer, to avoid painting over rust, they are all phosphoric acid based. Rust can hide in a very small rust pit and then become very active, though unseen, especially under a thick coat of paint.
 
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Mark Schrier
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Joined: 13 Jun 2013
Posts: 68
Location: Washington State

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PostPosted: Mon Jul 29, 2013 4:51 am    Post subject: Re: Battery Acid Damage Reply to specific post Reply with quote

I ended up wire wheeling it and applying good old naval jelly. With a little primer and paint, it should be good to go.

I'm wondering about the reason this happens. As 36 Coupe pointed out overcharging the battery can be a culprit. Is there any way to correct the charging system? It is a '49 8N-194800.

Thanks,
Mark
 
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Tim Daley(MI)
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Joined: 05 Aug 2012
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PostPosted: Mon Jul 29, 2013 4:59 am    Post subject: Re: Battery Acid Damage Reply to specific post Reply with quote

You can neutralize the acid with a water and baking
soda mixture. Once you have bare metal and before
painting, use a Permatex product called EXTEND which
will convert red oxide to black oxide and prevent
any further rusting.
 
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