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04-04-2017, 03:37 PM
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#1
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Veteran Member
City: Rochester, NY
Join Date: Sep 2016
Posts: 46
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Rust proofing after cutting threads
I need to make up several very long bolts for my build (some as big as 40 inches). I found a good price on 5/8" galvanized bar stock that I can cut to length and thread to my specifications. I don't want use SB rod, sticker shock!
After I cut the threads, and there by remove all the galvanizing from the bar stock in the threaded area, what is the best way to treat the exposed steel to prevent/avoid the threads rusting? Epoxy? Paint?
appreciate the input.
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04-04-2017, 03:46 PM
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#2
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Guru
Join Date: Jan 2010
Posts: 1,178
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Depends on what these bolts are holding . I always like Mercury soft seal or similar product the coat the same size bolts so they would not corrode when they are going through a housing
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04-04-2017, 05:02 PM
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#3
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Guru
City: Sydney
Join Date: Jul 2015
Posts: 1,646
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04-04-2017, 05:38 PM
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#4
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Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,299
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It might be worth a call to these folks and see if they can supply you with galvanized bolts as long as you need.
Videos - Portland Bolt
Watch the videos about making galvanized bolts. Very interesting.
__________________
Parks Masterson
Retired from Hopkins-Carter Marine Supply
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04-04-2017, 05:39 PM
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#5
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Guru
City: Seaford Va on Poquoson River, VA
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 2,264
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Marine grease.
You could overdrill the hole and line with polyethylene tubing, then put the bolt in with marine grease slathered on the threads. The tubing will reject water and keep the bolts dry, and the marine grease is water resistant.
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04-04-2017, 06:08 PM
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#6
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Guru
City: Palm Coast, FL
Vessel Name: Coquina
Vessel Model: Lagoon 380
Join Date: Jan 2017
Posts: 2,570
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316 stainless 5/8" round bar is just under $20 for 48"
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04-04-2017, 06:11 PM
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#7
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Guru
City: Philadelphia, PA
Vessel Name: Revel
Vessel Model: 1984 Fu Hwa 39
Join Date: Nov 2015
Posts: 1,024
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You could also consider making up the bolts in plain steel and then having them galvanized. There are folks in the business and probably Rochester is large enough to have such a shop. Well, certainly Buffalo!
https://www.galvanizeit.org/about-ag...ns/location/ny
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04-05-2017, 09:09 AM
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#8
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Guru
City: Windsor
Vessel Name: Keeper IV
Vessel Model: 44 Viking ACMY
Join Date: Nov 2013
Posts: 1,350
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Quote:
Originally Posted by DHeckrotte
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Unfortunately these facilities typically surcharge for small batch jobs. So much so that it's not worth it.
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04-05-2017, 12:21 PM
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#9
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Guru
Join Date: Jun 2008
Posts: 5,034
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Why not buy galvanized threaded rod? McMaster Carr has these in various lengths.
__________________
Jay Leonard
Ex boats: 1983 40 Albin trunk cabin, 1978 Mainship 34 Model 1
New Port Richey, Fl
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04-05-2017, 12:43 PM
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#10
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Guru
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
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I use corrosion pro.
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04-05-2017, 01:10 PM
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#11
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,738
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I'd find some pine tar.
__________________
Eric
North Western Washington State USA
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04-05-2017, 01:40 PM
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#12
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Senior Member
City: Essex, Ct.
Vessel Name: Harmony
Vessel Model: 1982 41' President
Join Date: May 2013
Posts: 436
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Rust protection against what elements and where is the application ?
Above water line ?
Sea water ?
Mission critical stuff ?
Submersion or encapsulated ?
Will you be able to view the area for inspection every 5 or so years ?
SS is only good where there is oxygen to keep the surface protected.
Typically galvanized products are not used on boats.
We all have good opinions and responses, but we need more info.
__________________
Tom
"Harmony"
1982 41' President
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