Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 08-04-2006, 09:23   #1
Registered User
Mr. Fixit's Avatar

Join Date: Jul 2005
Posts: 33
Images: 2

I am getting ready to reinstall hardware on my Boom. I painted it.What should I use to eliminate or reduce corrosion (boom is aluminum). When I removed hardware there was quite a bit of corrosion around the screws and I decided to enlarge holes ,re-tap.Is there anything I can do to stop this corrosion?

Mr. Fixit is offline   Reply With Quote
Old 08-04-2006, 09:40   #2
Senior Cruiser
Talbot's Avatar

Cruisers Forum Supporter

Join Date: Jun 2004
Location: Brighton, UK
Boat: Privilege 37
Posts: 3,578
Images: 32
corrosion will be where stainless screws meet the alluminium. If possible, riveting with monel will eliminate corrosion, but if stainless/aluminium is essential, the try to provide a buffer layer - old inner tube for components, or proper corrosion paste designd for this purpose (dont know what its called in USA)

"Be wary of strong drink. It can make you shoot at tax collectors - and miss."
Robert A Heinlein
Talbot is offline   Reply With Quote
Old 08-04-2006, 11:39   #3
Moderator Emeritus
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 29,326
Images: 240
Apply a good Anti-Seize compound to the male threads.
Anti-Seize Compounds are designed to protect threaded metal parts from rust, corrosion, galling and seizing. Good quality anti-seize has lots of metal (active ingredient) and little grease. This makes it thick and pasty. Since metal is expensive and grease is inexpensive, poor quality anti-seize is often a can of grease with a sprinkling of copper or nickle flakes. Zinc rich anti-seize is the best method of preventing corrosion seizing of SS threaded fasteners in Aluminum.

Separate the Aluminum Spar from the Hardware with an insulating Isolation Pad.
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"

GordMay is offline   Reply With Quote
Old 08-04-2006, 12:36   #4
Registered User

Join Date: Jan 2005
Location: Seattle area (Bremerton)
Boat: C&C Landfall 39 center cockpit "Anahita"
Posts: 1,043
Images: 6
More specific to add to Gord's reply:

Several years ago Practical Sailor evaluated several common solutions to preventing the problem of S/S fasteners from interacting with the aluminum into which they are threaded. The best solution, at that time, was (oddly enough it might seem) Locktite. Use the kind which allows refitting unless you don't want to ever take out the fastener (then use the red stuff).

Since that time Ultra Tef Gel [ The Corrosion Eliminator and Anti-Sieze Lubricant] came along (expensive) and works well. What makes these very different solutions to work is their ability to prevent any egress of oxygen into the space separating the two materials under any condition.

I have successfully used 3-M mylar tapes to isolate S/S from the mast or boom using an Exacto knife to carefully form the proper outline of the part. Still working well after 26 years.
Rick is offline   Reply With Quote
Old 08-04-2006, 12:49   #5
Senior Cruiser
Alan Wheeler's Avatar

Cruisers Forum Supporter

Join Date: Dec 2003
Location: Marlborough Sounds. New Zealand
Boat: Hartley Tahitian 45ft. Leisure Lady
Posts: 8,038
Images: 102
I agree Rick, the blue locktite works very well. Also, Lanocote. I use lanocote a lot on all sorts of things. Hmmm, the smeel reminds of...something...???
Anyway, when you are fitting a component, firstly, use a urathane adhesive sealant by applying it is a thin film to one or both materials. Allow it to go off so as it is no longer sticky. Place a thin smear of lanocote to the surface and bolt up. If you want to add more strength than just the bolts or rivets, then apply both components while the adhesive is still wet and don't use the lanocote of course.

For God so loved the world..........He didn't send a committee.
Alan Wheeler is offline   Reply With Quote
Old 08-04-2006, 16:28   #6
Senior Cruiser
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,027
Interesting, April Sail magazine has an article on re-fitting a mast. They say not to use rubber in between the fitting and the mast, but to use polyurethane like 3m 4200 or sikaflex 291. Use these for the screws as well. Lanocote, Tef-Gel, and Duralac can be used for removable items and fastener holes if wanted.

DeepFrz is online now   Reply With Quote

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 15:29.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.