battery acid problem, acid resistant epoxie - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 02-23-2007
Senior Member
 
Join Date: Sep 2006
Location: connecticut
Posts: 183
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
jasonr575 is on a distinguished road
battery acid problem, acid resistant epoxie

I have a 37 morgan (1976), The area for the house batteries has had some boil over of the batteries and it was wearing away paint of the bulkhead and making the wood wet. I removed the batteries, washed it with baking soda and now am thinking of what to do. The area is very tight and there is no room for a battery box. I was going to put resin on the walls and sole of the battery compartment and then paint with an expoxie. Does anyone know of an epoxie that will resist battery acid or are there any other ideas. I am looking to prevent damage to sole and bulkhead from acid\jason
Reply With Quote Share with Facebook
  #2  
Old 02-23-2007
Idiens's Avatar
Larus Marinus
 
Join Date: Jan 2007
Location: Brussels
Posts: 1,756
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Idiens is on a distinguished road
Ouch! Hard luck. Acid in the wood work would be my main worry, it will eventually break down and the acid will creep a long way. I think epoxy is resistant itself, but the wood underneath it is in deep trouble. I fear surgery will be required to replace all the affected wood.
Reply With Quote Share with Facebook
  #3  
Old 02-23-2007
Senior Member
 
Join Date: Jul 2001
Posts: 1,174
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 14
k1vsk will become famous soon enough
The acid will erode epoxy almost as quickly as the underlying wood. There are some materials which you can use to line the area where you want to put the battery but it won't be cheap. Good quality neoprene sheets will cost significantly more than good quality plastic, the latter will work better than epoxy but more likely to abrade if you are not careful.
Reply With Quote Share with Facebook
  #4  
Old 02-23-2007
Zanshin's Avatar
Senior Member
 
Join Date: Aug 2006
Location: Germany
Posts: 2,165
Thanks: 0
Thanked 14 Times in 14 Posts
Rep Power: 9
Zanshin is on a distinguished road
You can dissolve sodium bicaronate in water (use a baking soda with a minimum or no additives) and really soak the wood through. I mean for several days, if possible. If the areas isn't watertight to just pour in the neutralizing solution, at least use some soaked clothes to give the neutralizer time to penetrate (after all, the acid had time as well...)

Using too much sodium bicarbonate solution is no problem, leaving acidity in the wood is! You can also buy some litmus strips to see if any acidity is left after treatment.

Plastics marked wtih FEP, PFA or PTFE are resistant to sulfuric acid, although you can order sheets of them to mould your own, I would look around Home Depot for something moulded from PTFE that fits your requirements. The thick black plastic sheets used in gardening are made of HDLPE, which is resistant to sulfuric acid. You could seal your battery area with an epoxy and cover that with a layer or three of sheeting.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #5  
Old 02-23-2007
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,622
Thanks: 2
Thanked 89 Times in 87 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Jason-
http://www.corrosion-engineering.com...ng%2007-03.pdf

One of many web references on sulfuric acid resistant epoxy. I would suggest that you contact a couple of epoxy makers to ask specifically about their products being suitable for this, apparently some are very resistant and others are not. If you get the right product, acid resistance should be no problem.

I might go a little further though, and when you are done epoxying the space, lay some ordinary felt (from a craft store or fabric store) under/around the batteries and saturate it with baking soda. That way, if any acid spills it is soaked up and neutralized and the inexpensive felt can be changed from time to time as needed. You'll also see where there has been any acid spilling so it is easy to keep an eye on.

Acid spilling out of the batteries at all means they are being overcharged--an expensive way to cut their lives. Or, overfilled and sloshing out, also not good. So once you've gotten the battery space cleaned up again, think about how and why the batteries are being cooked, ideally you should be able to stop the acid from overflowing at all.
Reply With Quote Share with Facebook
  #6  
Old 02-23-2007
Idiens's Avatar
Larus Marinus
 
Join Date: Jan 2007
Location: Brussels
Posts: 1,756
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Idiens is on a distinguished road
Quote:
Originally Posted by hellosailor
... lay some ordinary felt (from a craft store or fabric store) under/around the batteries and saturate it with baking soda. ...
Thanks for the tip. My batteries are coming out shortly, they will go back in with a baking soda towel.
Reply With Quote Share with Facebook
  #7  
Old 02-23-2007
Senior Member
 
Join Date: Jan 2001
Posts: 497
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 14
Quickstep192 is on a distinguished road
I recently made the move to AGM (Absorbed Glass Mat) batteries. They are completely sealed and even if they were to rupture, there's nothing to leak. They have an extremely low self dichcharge rate, so they're still readt to go, even after long periods of storage. Solved a lot of problems for me, including the leakage ones you're experiencing.
Reply With Quote Share with Facebook
  #8  
Old 02-23-2007
Senior Member
 
Join Date: Jul 2001
Posts: 1,174
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 14
k1vsk will become famous soon enough
Hellosailor
I am always skeptical of these reports unless i also know what the relationship is, in this case, between Henkel and the resin manufacturer.
Also, is there a report summarizing the results of any long-term study implied in the link you attached?
thanks
Reply With Quote Share with Facebook
  #9  
Old 02-23-2007
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,622
Thanks: 2
Thanked 89 Times in 87 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
K1-
I don't know them from Adam, much less vouch for them. I only cited it as one of many similar internet links that can be found by searching the terms. I know some firms that have used epoxy-lined tanks for acid resistance, so there are at least some epoxies that aren't bothered by some acids.
Reply With Quote Share with Facebook
  #10  
Old 02-23-2007
CapnHand's Avatar
humble pie rat
 
Join Date: Nov 2006
Location: Location, Location
Posts: 867
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
CapnHand is on a distinguished road
I think it was a good point brought up to look into the root cause of the issue and fix that to prevent another incident.

You might try the wooden boat forums for experience on acid leaks and what you can do to limit future damage.

A note to the West System people and other epoxy manufacturers will provide info on what you can do to protect the area should another incident happen.
__________________
There are 10 kinds of people. Those who understand binary and those who don't.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Battery Bank Design Kevin Jeffrey Gear and Maintenance Articles 0 05-12-2003 08:00 PM
Battery Bank Design Kevin Jeffrey Cruising Articles 0 05-12-2003 08:00 PM
Choosing Batteries Kevin Jeffrey Cruising Articles 0 04-07-2003 08:00 PM
Installing a New Battery Bank Sue & Larry Gear and Maintenance Articles 0 09-26-2002 08:00 PM
Boat Battery Power East Penn Manufr. Gear and Maintenance Articles 0 01-18-1999 07:00 PM


All times are GMT -4. The time now is 07:10 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.