Mystery rash on bottom paint - 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 02-20-2008
Senior Member
 
Join Date: Aug 2007
Posts: 306
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
thekeip is on a distinguished road
Mystery rash on bottom paint

OK, here's one for the guru's:

The ist time I saw this condition, a J-109 came into the yard with a severely corroded / erroded sail drive unit and the bottom paint looked to be burnt. The boat is probably 3-5 yrs old. The original bottom paint was Trinidad SR, overcoated with some sort of carbon 'race finish'. The whole surface, but localized just above the keel and including the keel and the sail drive unit, for an oval shaped area of about 5ft, was covered with something akin to prickely-heat on a kid's bottom. The destroyed sail drive problem was a grounding issue, and seems to be corrected and may not be related.

The 2nd time was (is) an Olson-25 with the same paint condition...but only on the stbd. side, and not affecting the rudder at all, which is as smooth as a baby's rear end. It's a different marina. AC power is probably not an obvious cause either...the boat and shore power connections seem perfect and go to the right places, and the system has been in place for many years.

The yard thinks it's most likely an 'electrical' issue; I think more a paint incompatability problem...any guesses???
Reply With Quote Share with Facebook
  #2  
Old 02-20-2008
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
Can you post photos of this???
__________________
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
  #3  
Old 02-20-2008
Senior Member
 
Join Date: Aug 2007
Posts: 306
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
thekeip is on a distinguished road
I think so...tomorrow evening.
thekeip
Reply With Quote Share with Facebook
  #4  
Old 02-21-2008
Fstbttms's Avatar
I don't discuss my member
 
Join Date: Feb 2003
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 2,034
Thanks: 2
Thanked 18 Times in 18 Posts
Rep Power: 12
Fstbttms will become famous soon enough
I have seen this phenomenon with Trinidad-painted boats many, many times. Most frequently with black Trinidad. It seems the paint is reacting with the metal it is in contact with, such as bronze thru-hull or a saildrive housing. The paint discolors and loses efficacy in an ever-widening circle around the object in question. I don't know the specifics of why it happens, but I do know that the people at Interlux are aware of the issue. I wouldn't count on a lot of support from them, however.
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
Confessions of a bottom feeder PracticalSailor Gear and Maintenance Articles 9 06-18-2008 04:33 PM
The Bottom Paint Blues Don Casey Gear and Maintenance Articles 0 06-22-2003 08:00 PM
How to Paint Your Own Deck Don Casey Gear and Maintenance Articles 0 02-04-2002 07:00 PM
Bottom Paint Compatibility Dan Dickison Gear and Maintenance Articles 0 01-24-2001 07:00 PM
Paint the Bottom Yourself Tom Wood Gear and Maintenance Articles 0 03-09-1999 07:00 PM


All times are GMT -4. The time now is 01:12 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

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.