On Tue, 9/6/16, James Alton lokiyawl2@aol.com [amelyachtowners] <amelyachtowners@yahoogroups.com> wrote:

Subject: Re: [Amel Yacht Owners] what type of product to put on bolt attaching the windlass to deck?
To: amelyachtowners@yahoogroups.com
Date: Tuesday, September 6, 2016, 10:56 AM


 









Bill,
   I must say that this was the
best explanation I have ever read for why I have had so many
problems with stainless on stainless threads over the
years..thank you!  I can now imagine the little batteries
that are formed between the active and passive locations in
such a fastener after Mother Nature adds her natural
electrolyte…..  
  Bronze and stainless threads
seems almost never gall.  Is the softer bronze acting as
sort of a lubricant?
  I was thinking that on Sueno
that I would probably start with a clean stainless windlass
bolt and a clean hole.  Add the Never Seez with a Q tip or
something similar to the embedded plate only, keeping it off
of the fibreglass.  Then apply my sealant between the
interface of the windlass and the deck but hold the windlass
up off of the deck as much as possible while the bolts were
inserted to keep from carrying the sealant down into the
Never Seezed area.  The objective being to avoid
contaminating the faying surfaces for the sealant to insure
a good seal.   It’s too bad that a good seal to keep the
water out also excludes the O2 needed for the stainless
oxide for form but I feel that keeping salt water out of
those holes is more important.  I can imagine that once
salt water migrates in around the plate that there is no
cleaning/drying it out.
   Please tell me how you would
do it since I am sure that you have put a lot more thought
into this than I have.
Best,
James AltonMaramu #220 SuenoSardinia
On Sep 6, 2016, at 12:04 PM, Bill
greatketch@yahoo.com
[amelyachtowners] <amelyachtowners@yahoogroups.com>
wrote:

If your intent is to take it
apart every two or three years to clean salt build up from
between the deck and the windlass housing as recommended by
Lofrans, pretty much anything will probably work.
 
I assume the deck plate is
stainless, as well as the bolts, so in this case you are
protecting against two issues, galvanic corrosion and
"galling" or "cold welding".
 
Most kinds of stainless steel can
exist in two forms "active" and
"passive" depending on the availability of free
oxygen.  These two forms are quite far apart on the
galvanic scale.  When stainless on stainless threads are
wet it sets up a good environment for active and passive
forms to exist close to each other and potentially cause
issues.  For this reason using a product that excludes
water from the joint is a good idea. Lanocote, tef-gel,
Never-Seez, or standard waterproof greases would all do this
for a least a couple years. 
A simple way to think about
stainless galling is that under very high pressures the
protective surface oxide layer rubs off, the
"pure" metal underneath "melts" into
itself and the parts become welded together.  In preventing
this, in my experience, Lanocote is good, Tef-Gel and
Never-Seez are better.  Some greases are good, some not so
much, at this.
So...  All told my
recommendation would be either tef-gel or never-seez, and
I'd know I could get them apart at any time in the
future with no problems. On my boat I'd most likely use
tef-gel only because it lives in my rigging tool bag, while
the never-seez lives in the engine room!
Bill KinneySM#160 HarmonieNarragansett Bay, RI,
USA



On Sep 6, 2016, at 09:37,
Alexandre Uster von Baar uster@rocketmail.com [amelyachtowners]
<amelyachtowners@yahoogroups.com>
wrote:

 Good morning, 

To make story short, I removed
the windlass, etc. 

What type of product would you
put on the bolts attaching the windlass to the deck?  
Lanocote? Marine
grease?  

one was extremely difficult to
remove (4 hours) and i would prefer avoid that in the
future…

Thanks in
advance, 
Sincerely,
Alexandre
SM2K
#289 NIKIMAT
Club
Nautico de San Juan, Puerto Rico












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