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18-12-2010, 10:38
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#1
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Registered User
Join Date: Dec 2010
Location: Alameda, CA
Boat: Columbia 36
Posts: 11
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What's the Best Way to Protect Keel Bolts ?
With the rainy season I've noticed some water in the bilge and a little rust forming on the bolts. Obviously this is not good. I've cleaned off the rust but what should I do to keep this from happening again. I'm thinking about melting some wax and coating them.
Is there a better solution?
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18-12-2010, 10:48
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#2
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Registered User
Join Date: Apr 2009
Location: Vashon, WA
Boat: Haida 26', 18' Sea Kayak, 15' kayak, 6.5' skiff, shorts
Posts: 837
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I bet fluid film would be good.
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18-12-2010, 10:58
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#3
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Moderator
Join Date: Aug 2009
Location: Solent, England
Boat: Moody 31
Posts: 18,398
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The previous owner has sprayed Waxylon a car body underseal on our some years ago. Whilst it doesn't look very attractive its working well. Moodys used a gelcoat flowcoat originally.
Pete
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18-12-2010, 11:02
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#4
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Registered User
Join Date: Feb 2010
Location: Los Angeles
Boat: Pearson 281
Posts: 684
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Try Lanocote...
Not my favorite anti-sieze but should be quite useful for what you are talking about.
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18-12-2010, 13:37
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#5
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Registered User
Join Date: Dec 2010
Location: Alameda, CA
Boat: Columbia 36
Posts: 11
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Ohetr tahn da sky wrehe's all taht wtear cnomig form? Es et nroaml taht atfer a rian ta hvae ae hlaf icnh a wtaer en da bgidle? Da msat be setpped on da dcek, mbaye sulhod I sael da santtoins? I cehkced da ckocs an hsoe calpms, tehy aapepr a be fnie. Colud stetnig en da btotom csuae porebms?
I dno't lkie wtaer dwon tehre..
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18-12-2010, 13:51
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#6
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Registered User
Join Date: Mar 2003
Location: Philippines in the winters
Boat: It’s in French Polynesia now
Posts: 11,368
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Quote:
Originally Posted by Larsdelmar
Ohetr tahn da sky wrehe's all taht wtear cnomig form? Es et nroaml taht atfer a rian ta hvae ae hlaf icnh a wtaer en da bgidle? Da msat be setpped on da dcek, mbaye sulhod I sael da santtoins? I cehkced da ckocs an hsoe calpms, tehy aapepr a be fnie. Colud stetnig en da btotom csuae porebms?
I dno't lkie wtaer dwon tehre..
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Yeah, it's best to keep'm dry if they are a ferrous metal. Check out you deck fittings and hull to deck joint.
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
The measure of a man is how he navigates to a proper shore in the midst of a storm!
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18-12-2010, 14:16
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#7
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CF Adviser
Join Date: Dec 2008
Location: sausalito
Boat: 14 meter sloop
Posts: 7,260
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Quote:
Originally Posted by Larsdelmar
With the rainy season I've noticed some water in the bilge and a little rust forming on the bolts. Obviously this is not good. I've cleaned off the rust but what should I do to keep this from happening again. I'm thinking about melting some wax and coating them.
Is there a better solution?
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petroleum jelly
__________________
cruising is entirely about showing up--in boat shoes.
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18-12-2010, 15:32
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#8
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Eternal Member
Join Date: Aug 2006
Location: North of Baltimore
Boat: Ericson 27 & 18' Herrmann Catboat
Posts: 3,798
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I am not gonna touch that line!!!!!!!!!!!!!!!!!!!!
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18-12-2010, 16:57
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#9
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Registered User
Join Date: Oct 2007
Location: Lakewood Ranch, FLORIDA
Boat: Alden 50, Sarasota, Florida
Posts: 3,464
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Assuming they are stainless bolts, the WORST thing you can do is seal them. If SS is deprived of oxygen in water, it will quickly crevice corrode, even in a humid environment, and since no seal is both permanent and totally effective at eliminating all water, sealing usually leads to worse problems than it solves regardless of what you try. It is "stain less", not "rustproof".
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20-12-2010, 07:42
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#10
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Registered User
Join Date: Jan 2009
Location: Maitland, FL
Boat: Bristol 29
Posts: 230
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Quote:
Originally Posted by S/V Illusion
Assuming they are stainless bolts, the WORST thing you can do is seal them. If SS is deprived of oxygen in water, it will quickly crevice corrode, even in a humid environment, and since no seal is both permanent and totally effective at eliminating all water, sealing usually leads to worse problems than it solves regardless of what you try. It is "stain less", not "rustproof".
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In my opinion you are making very gross generalizations. Crevice corrosion is caused by acids in water breaking down the passivated protective oxide layer on the surface of the metal when the metal is in an oxygen-poor condition. Sea water is more prone to attacking that oxide layer because of the clorides in seawater, fresh water far less; however acid rain can cause the same effect as seawater. That said, there are many alloys of "stainless steel" some far more suited for underwater use than others. Also, the shape and machining and surface smoothness of the metal will influence its ability to deny crevice corrosion. Finally for you to say stainless steel will "quickly crevice corrode" is simply not accurate and very misleading.
To the OP's original question, I would use Lanocote as well.
__________________
David www.bristol29.com
"The lookout that first sights the cat shall have ten guineas and remission of sins, short of mutiny, sodomy, or damaging the paintwork." - Jack Aubrey
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20-12-2010, 17:11
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#11
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Registered User
Join Date: Dec 2010
Location: Alameda, CA
Boat: Columbia 36
Posts: 11
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Thanks everyone, it just goes to show there's always more than one way to skin a cat. Being new to boat maintenance it's nice getting different ideas. I'm sure I'll have many more questions as I begin to go through and learn the systems on board.
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20-12-2010, 17:51
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#12
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Registered User
Join Date: Oct 2007
Location: Lakewood Ranch, FLORIDA
Boat: Alden 50, Sarasota, Florida
Posts: 3,464
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Quote:
Originally Posted by FloridaWriter
In my opinion you are making very gross generalizations. Crevice corrosion is caused by acids in water breaking down the passivated protective oxide layer on the surface of the metal when the metal is in an oxygen-poor condition. Sea water is more prone to attacking that oxide layer because of the clorides in seawater, fresh water far less; however acid rain can cause the same effect as seawater. That said, there are many alloys of "stainless steel" some far more suited for underwater use than others. Also, the shape and machining and surface smoothness of the metal will influence its ability to deny crevice corrosion. Finally for you to say stainless steel will "quickly crevice corrode" is simply not accurate and very misleading.
To the OP's original question, I would use Lanocote as well.
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It is the oxygen which renews the oxide layer protecting the steel; without it, you lose all protection. This isn't a generalization; it is a fact as is the fact the steel will corrode in the absence of air. These are fundamental
truths learned both theoretically and by experience as a chemical engineer for over 30 years.
Your boat, your rules but please don't imply I am misleading anyone.
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24-12-2010, 12:56
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#13
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֍֎֍֎֍֎֍֎֍֎
Join Date: Apr 2006
Posts: 15,136
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Lars-
Assuming you want to seal them, you can place a paper cup around each one, with the bottom cut out. Then pour in beeswax to surround and seal.
Beeswax is cheap, easily removed for inspections, won't make a mess or migrate. In the US, typically $3 buys a good amount as a "toilet bowl gasket", the big donut-shaped wax ring used to seal under toilet bowls. Much cheaper than the higher grades used in candle-making and such.
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24-12-2010, 13:39
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#14
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Senior Cruiser
Join Date: Jan 2010
Location: PORTUGAL
Posts: 30,561
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Quote:
Originally Posted by Larsdelmar
Ohetr tahn da sky wrehe's all taht wtear cnomig form? Es et nroaml taht atfer a rian ta hvae ae hlaf icnh a wtaer en da bgidle? Da msat be setpped on da dcek, mbaye sulhod I sael da santtoins? I cehkced da ckocs an hsoe calpms, tehy aapepr a be fnie. Colud stetnig en da btotom csuae porebms?
I dno't lkie wtaer dwon tehre..
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Can you say that again after the Schnapps has worn off please.....
__________________
It was a dark and stormy night and the captain of the ship said.. "Hey Jim, spin us a yarn." and the yarn began like this.. "It was a dark and stormy night.."
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22-10-2013, 11:27
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#15
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Registered User
Join Date: Oct 2013
Posts: 20
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Re: What's the Best Way to Protect Keel Bolts ?
Quote:
Originally Posted by hellosailor
Lars-
Assuming you want to seal them, you can place a paper cup around each one, with the bottom cut out. Then pour in beeswax to surround and seal.
Beeswax is cheap, easily removed for inspections, won't make a mess or migrate. In the US, typically $3 buys a good amount as a "toilet bowl gasket", the big donut-shaped wax ring used to seal under toilet bowls. Much cheaper than the higher grades used in candle-making and such.
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That is a neat idea I can see many ways this could be modified to use any number of inert (relatively) materials englobing the bolts to protect them. I'll definately look into this whenit's my turn.
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