keel bolts - 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 03-13-2008
ArgleBargle's Avatar
Senior Member
 
Join Date: Jan 2007
Location: Victoria, B.C.
Posts: 176
Thanks: 5
Thanked 1 Time in 1 Post
Rep Power: 8
ArgleBargle is on a distinguished road
keel bolts

Hi

I noticed some rust around the painted nuts securing the keel bolts on my 1984 Jeanneau Atalia. I informally consulted a surveyor who suggested rather than paying him $$ (really, quite an honest guy), I remove them one by one to inspect them. If they were found to be rust free, he suggested that the rust was probably from the nut/plate.

He suggested a 1984 french boat would not have used stainless, however I have records from a prior owner showing that they were replaced in the late 1990's with stainless.

Unfortunately, they are of the type without a bolt head (i.e., threaded throughout their length) so I could not remove them. I did remove the nut and the bolt under it seemed quite pristine. There is a metal backing plate.
The bilge is quite dry.

I tried to attach a photo of the two bolts in question, but although Sailnet says i may attach files, everytime i try i get "attachment fails". So, they can be viewed at:

Shaw Photo Share

I know very little about keel bolts and was hoping to never need to.

My questions are

1. given these are stainless steel, no rust on the actual bolt, should I still be worried?

2. Can these headless keel bolts be easily removed?

I have reviewed the previous posts regarding keel bolts.

thanks profusely in advance.

cheers
Reply With Quote Share with Facebook
  #2  
Old 03-13-2008
pippifax
 
Join Date: Jun 2007
Location: Switzerland
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
pippifax is on a distinguished road
1. You need not be worried, what is visible is some surface rust which does not go to the structure.
2. If you could remove the keel bolts the counterpart underneath your boat would simply fall off. The bolts will only slide through the keel once you have taken all nuts off and lift the boat up.

Happy??
George
Reply With Quote Share with Facebook
  #3  
Old 03-13-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Photo posting on Sailinet is basically broken...always has been, always will be. I'd recommend you read this post to get the most out of your time on sailnet, and learn how to link external photos. You need a minimum of 10 posts before you can link external photos, since that is an antispam feature setup a while back.

My concern would be whether the keelbolts are suffering from crevice corrosion or not. If the rust you see is coming from the bolts, and they are rusting below the visible area, you very well may have a problem. Do you know whether they used 304 or 316 stainless for the bolts? If it was 304, you may have a problem, since 304 is more sensitive to chloride ion stress cracking and crevice corrosion.

How dry is the "quite dry" bilge. Is it dry or is it occasionally wet? Do you sail on fresh water or salt??

Pippifax is probably incorrect about the bolts sliding through the keel. Most likely, the bolts are either cast into the keel or they're made of threaded rod and screwed into the keel. Is the keel lead, steel or cast iron?
__________________
Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #4  
Old 03-13-2008
camaraderie's Avatar
moderate?
 
Join Date: May 2002
Location: East Coast
Posts: 13,878
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 15
camaraderie is a jewel in the rough camaraderie is a jewel in the rough camaraderie is a jewel in the rough
My advice is that next time you haul your boat...have the keel supported very well and remove the nuts and the plate to see where the rust is coming from and if the threaded rod is involved below where you can see right now. My guess is that it will be the lower side of the backing plate or washers or nuts but you have to rule out corrosion on the threaded rod. If it is only the backing plate, you can get another one fabricated out of stainless and be on your merry way with no worries.
__________________
No longer posting. Reach me by PM!
Reply With Quote Share with Facebook
  #5  
Old 03-13-2008
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,264
Thanks: 9
Thanked 111 Times in 81 Posts
Rep Power: 15
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Depending on the paint

Depending on the "paint" used you could be creating crevice corrosion. That "paint" could be epoxy that water has found it's way into thus creating an oxygen free environment for crevice corrosion.

The bolts look fine now but there is NO NEED to paint stainless or to coat it with epoxy or any other coating.

If it were me I take my Dremel and a stainless steel brush attachment and clean the paint off then you can always see what is going on with the surface of the stainless...


These are the original keel bolts from our 1979 boat! Note the condition and the lack of any coating on the bolts... the photo was taken in the spring of 2007 or 28 years old...!!
__________________
______
-Maine Sail / CS-36T


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




© Images In Posts Property of Compass Marine Inc.


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
My First Boat...Boat Term Question... Kacper General Discussion (sailing related) 38 09-23-2008 06:52 PM
reducing keel/adding fin? abacosol Gear & Maintenance 9 07-01-2007 09:32 PM
Keel Bolts Repair/replacement chartscharts Gear & Maintenance 11 08-07-2006 03:53 PM
Keel Bolt Repairs Don Casey Gear and Maintenance Articles 0 11-10-2003 07:00 PM
Keel Bolt Concerns Don Casey Gear and Maintenance Articles 0 10-12-2003 08:00 PM


All times are GMT -4. The time now is 12:47 AM.

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