bottom paint on centerboard? - 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 > General Interest > General Discussion (sailing related)
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 05-06-2011
Member
 
Join Date: Sep 2008
Posts: 30
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
sidewinder585 is on a distinguished road
bottom paint on centerboard?

I recently purchased a C&C corvette 31' sailboat. she has a cast iron centerboard which when it is in the up position is still completely submerged. I will be keeping her at a dock on lake Erie and was wondering if i need to coat the centerboard? I know that if I use a copper based antifouling paint that I will have to completely cover the cast iron to prevent galvanic corrosion. that being said, the board does not look like it has ever been painted. how much maring growth will accumulate on a raw cast iron board over a period of 6-8 months? will it prevent the board from sliding up into or down out of its case? thanks in advance for the replys. -John
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 05-06-2011
TQA's Avatar
TQA TQA is offline
Bombay Explorer 44
 
Join Date: Apr 2009
Posts: 2,700
Thanks: 0
Thanked 59 Times in 55 Posts
Rep Power: 6
TQA is on a distinguished road
Quote:
Originally Posted by sidewinder585 View Post
I recently purchased a C&C corvette 31' sailboat. she has a cast iron centerboard which when it is in the up position is still completely submerged. I will be keeping her at a dock on lake Erie and was wondering if i need to coat the centerboard? I know that if I use a copper based antifouling paint that I will have to completely cover the cast iron to prevent galvanic corrosion. that being said, the board does not look like it has ever been painted. how much maring growth will accumulate on a raw cast iron board over a period of 6-8 months? will it prevent the board from sliding up into or down out of its case? thanks in advance for the replys. -John
I do not know how bad the fouling is in Lake Etrie but I have a centreboard boat and antifoul the board. Mine is not cast iron so gets stuck quite quickly. No antifouling and after a month in a high fouling area and it will not drop. I have to get out on a bouncy day to get it down.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 05-06-2011
fallard's Avatar
Senior Member
 
Join Date: Nov 2009
Location: Mystic
Posts: 901
Thanks: 0
Thanked 8 Times in 7 Posts
Rep Power: 6
fallard is on a distinguished road
The best approach is to sandblast--literally, with sand, not walnut shells--the cast iron centerboard and then immediately coat it with a 2-part epoxy, like Interlux 2000. Thickness matters, but about 3 coats with a solvent-proof roller ought to be the minimum. You could then apply an antifouling paint.

I had a steel centerboard and the only way to keep it from rusting was to get down to bare metal and apply a barrier coat. The only way to get down into the pitted areas is with sandblasting. If you do it right, the epoxy will effectively isolate the iron from the water and the paint.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 05-07-2011
Senior Member
 
Join Date: Nov 2008
Location: Long Island
Posts: 2,128
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 7
WanderingStar is on a distinguished road
I believe the lakes have less fouling. Here on LI I have seen a centerboard frozen in place by barnacles. The advice above is good. Use a good primer or barrier then antifoul.
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 05-07-2011
Senior Member
 
Join Date: Feb 2010
Location: Maine
Posts: 105
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 5
P35juniper is on a distinguished road
do they have zebra mussels there? if so I'd do something for antifouling, the slime shouldn't be much of a problem but any hard critters will be.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 05-07-2011
grumpy old man
 
Join Date: Apr 2011
Posts: 3,793
Thanks: 1
Thanked 81 Times in 77 Posts
Rep Power: 4
bobperry will become famous soon enough
I also have an iron keel and I think Fallard is spot on but you will need anti fouling paint.

I took my keel down to bare metal. Well to be honest my wife did it. The yard taped he up into a jump suit, tented the keel and sent her in with a grinder sure that she would be out in 5 minutes. Four hours later my wife emerged with a totally ground keel. The earned the respect of the yard guys.

I know her. There was a never a doubt in my mind that she could do it. Actually I didn't know she was doing it until it was done.
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 05-07-2011
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 15,342
Thanks: 88
Thanked 242 Times in 233 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
Quote:
Originally Posted by bobperry View Post
......I took my keel down to bare metal. Well to be honest my wife did it. .......
Wow... now that's good crew!
__________________
Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 05-09-2011
Junior Member
 
Join Date: Feb 2011
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
grainedetoile is on a distinguished road
On aluminium centerboarders, here on the other side of the earth (australasia) i will suggest the sandblasting, phosphoric acid cleaning, Altex primer #1, altex primer #3, and the antifouling coating. Is this strategy transferable to iron centerbords, that's the good question.

However on my 42 ft centerboarder (2 centerboards), this is not the place where the fouling grows fast. Probably it's too dark for them?
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 05-09-2011
ASA and PSIA Instructor
 
Join Date: Apr 2000
Posts: 3,497
Thanks: 7
Thanked 19 Times in 19 Posts
Rep Power: 15
sailingfool will become famous soon enough
Ditto on stripping the board. I have striped steel keels with a grinder, a wire brush wheel was my preferred tool. Use whatever and get the metal to bright white and immediately cover. I prefer straight West epoxy, 4-5 coats as it is harder than Interprotect. Then bottom paint.
__________________
Certified...in several regards...
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 05-09-2011
Member
 
Join Date: May 2009
Location: Mansfield TX
Posts: 66
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
FlyNavy is on a distinguished road
I don't think that Zebra Mussels would present as much of a problem as barnacles. Mussels and Barnacles are filter feeders and are thickest where there is a constant flow of nutrients. The Great Lakes don't have tidal flows to constantly wash in new food sources, Zebra mussels congregate most densely on municipal water intakes where there is an artificial nutrient flow.
If you've had a lot of muscles on your hull then I would be concerned but otherwise I'm with the clean and seal followed by a barrier coat folks.
__________________
'79 San Juan 7.7
Joe Pool Lake
DFW area TX
Sailing year 'round
(Not up North)
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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
Bottom paint prep, chipped paint josrulz Gear & Maintenance 16 02-14-2010 09:24 PM
Best bottom paint for PNW tjvanginkel Gear & Maintenance 9 06-12-2008 09:16 PM
Bottom paint mhfowle Gear & Maintenance 9 10-05-2006 12:03 PM
Bottom Paint GhostBoat Gear & Maintenance 5 04-21-2003 11:06 AM
Paint the Bottom Yourself Tom Wood Gear and Maintenance Articles 0 03-09-1999 08:00 PM


All times are GMT -4. The time now is 06:02 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.