Short of tearing it apart, does anyone have any ideas about preventing poultice corrosion between the teak caprail and the aluminum to which it's attached? My 58' Roamer has the sticky white hydroxide oozing in spots from the contact area. D.Allen
I think there are no shortcuts to get around this problem. You need to remove the teak and the screws that are the possible cause to the corrosion. Then repaint properly, maybe isolate with some epoxy and if you need screws again, try to find nylon bushings to keep them out of contact with the aluminium. But since your caprails are probably shaped after the years, maybe just using Sikaflex or similar will keep them in place and you have much less risk of corrosion in the future.
We had the same issues! Our cause was water intrusion under the edges of the teak setting up the conditions for the corrosion. I removed all of the old adhesive from the teak and decks and then sanded down to the original aluminum. Then zinc chromate and epoxy fairing. I then had the entire repainted with Awl-Grip which was sprayed so there were no breaklines in this area for water to penetrate. Upon the re-assembly we used 3M 101 ensuring the screws were coated with teff-gel, and the total surface area of the teak was sealed in the 101. Then we re-fastend the teak and sealed the edges. Mark
Done right... ..., as always Mark speaks with authority on restoration/aluminum issues. Still, his url-ology could use sum werk - for more on TEF-GEL, see here: http://www.wolfwire.com/tefgel/Tef-Gel.htm Cheers! Eric PS - Do get you poultice from eating chicken?
Eric, Was that a compliment?? Seriously, nice graphic you grabbed! Explains the issue clearly I would say. Mark Planning to be in the water next week!
Q's for Mark Mark, did u receive the e mail that i sent u about the back deck on my 67 Roamer looking forward 2 c pics and comments Dave
update Eric i posted an update on my 67 roamer under the heading, just starting out... have a look... will be posting pics soon. dave
