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Posted by RicodJour on May 19, 2009, 2:26 pm
> I don't know the science of it (or very much else for that matter),
> but I know that if you use a stainless steel bolt, you are NOT
> supposed to use a stainless steel nut or else the threaded area where
> they touch will corrode all to heck and you won't be able to get them
> apart. =A0 There is something, but I don't know what, about stainless to
> stainless and a lack of O2.
You can use stainless bolts and nuts, but there are good practices
when doing so, just as everything else in life.
http://www.estainlesssteel.com/gallingofstainless.html
PeterD was saying the stainless rusts when there's no oxygen, and
that's what I was addressing, that you addressed, that I just
addressed. Okay, I'm going to go up on a ladder now, I'm getting
dizzy down here. ;)
R
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Posted by JIMMIE on May 19, 2009, 3:13 pm
> > > On Tue, 19 May 2009 04:40:05 -0700 (PDT), bob haller <hall...@aol.com=
> > > wrote:
> > > >I would like a link to that! I was told non magnetic stainless doesn=
t
> > > >rust.
> > > I'll see what I can dig up. This is 'common knowledge' among boat
> > > builders, but not others. Problem being that the stainless looks
> > > really good on the exposed surfaces, then when you try to remove it,
> > > you find a 'ton' of rust on the burried parts. You could also try
> > > searching various marine sites too, I'm sure you will find it.
> > > FWIW, I didn't believe it when I was told first about the problem,
> > > then managed to see it as I did work on boats.
> > Oxygen is inseparable from oxidation (rusting). =A0I think it's more
> > likely that moisture was getting into those hidden areas and staying
> > there longer.
> > R
> I don't know the science of it (or very much else for that matter),
> but I know that if you use a stainless steel bolt, you are NOT
> supposed to use a stainless steel nut or else the threaded area where
> they touch will corrode all to heck and you won't be able to get them
> apart. =A0 There is something, but I don't know what, about stainless to
> stainless and a lack of O2.- Hide quoted text -
> - Show quoted text -
Anti sieze compund
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Posted by PeterD on May 19, 2009, 7:50 pm
On Tue, 19 May 2009 11:06:59 -0700 (PDT), Pat
>> > wrote:
>> > >I would like a link to that! I was told non magnetic stainless doesnt
>> > >rust.
>> > I'll see what I can dig up. This is 'common knowledge' among boat
>> > builders, but not others. Problem being that the stainless looks
>> > really good on the exposed surfaces, then when you try to remove it,
>> > you find a 'ton' of rust on the burried parts. You could also try
>> > searching various marine sites too, I'm sure you will find it.
>> > FWIW, I didn't believe it when I was told first about the problem,
>> > then managed to see it as I did work on boats.
>> Oxygen is inseparable from oxidation (rusting). I think it's more
>> likely that moisture was getting into those hidden areas and staying
>> there longer.
>> R
>I don't know the science of it (or very much else for that matter),
>but I know that if you use a stainless steel bolt, you are NOT
>supposed to use a stainless steel nut or else the threaded area where
>they touch will corrode all to heck and you won't be able to get them
>apart.
Stainless tends to 'gall' and freeze up. I've had stainless to
stainless fastners freeze when tightening, friction welded into one
piece so strong that the bolt sheared off but the nut never moved!
> There is something, but I don't know what, about stainless to
>stainless and a lack of O2.
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Posted by fftt on May 19, 2009, 9:15 pm
> On Tue, 19 May 2009 11:06:59 -0700 (PDT), Pat
> >> > On Tue, 19 May 2009 04:40:05 -0700 (PDT), bob haller <hall...@aol.co=
m>
> >> > wrote:
> >> > >I would like a link to that! I was told non magnetic stainless does=
nt
> >> > >rust.
> >> > I'll see what I can dig up. This is 'common knowledge' among boat
> >> > builders, but not others. Problem being that the stainless looks
> >> > really good on the exposed surfaces, then when you try to remove it,
> >> > you find a 'ton' of rust on the burried parts. You could also try
> >> > searching various marine sites too, I'm sure you will find it.
> >> > FWIW, I didn't believe it when I was told first about the problem,
> >> > then managed to see it as I did work on boats.
> >> Oxygen is inseparable from oxidation (rusting). =A0I think it's more
> >> likely that moisture was getting into those hidden areas and staying
> >> there longer.
> >> R
> >I don't know the science of it (or very much else for that matter),
> >but I know that if you use a stainless steel bolt, you are NOT
> >supposed to use a stainless steel nut or else the threaded area where
> >they touch will corrode all to heck and you won't be able to get them
> >apart.
> Stainless tends to 'gall' and freeze up. I've had stainless to
> stainless fastners freeze when tightening, friction welded into one
> piece so strong that the bolt sheared off but the nut never moved!
> > =A0 There is something, but I don't know what, about stainless to
> >stainless and a lack of O2.
SS has a huge tendency to gall......I once screwed together, by hand,
a dry SS short nipple (2" pipe) into a fitting. Only a couple turns
and the assembly almost seized up on me!
The pipe thread was a pipe rough, I didn't us any tape, lube or
dope.....I was just doing a dry fit up.
cheers
Bob
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Posted by fftt on May 19, 2009, 9:11 pm
> > > On Tue, 19 May 2009 04:40:05 -0700 (PDT), bob haller <hall...@aol.com=
> > > wrote:
> > > >I would like a link to that! I was told non magnetic stainless doesn=
t
> > > >rust.
> > > I'll see what I can dig up. This is 'common knowledge' among boat
> > > builders, but not others. Problem being that the stainless looks
> > > really good on the exposed surfaces, then when you try to remove it,
> > > you find a 'ton' of rust on the burried parts. You could also try
> > > searching various marine sites too, I'm sure you will find it.
> > > FWIW, I didn't believe it when I was told first about the problem,
> > > then managed to see it as I did work on boats.
> > Oxygen is inseparable from oxidation (rusting). =A0I think it's more
> > likely that moisture was getting into those hidden areas and staying
> > there longer.
> > R
> I don't know the science of it (or very much else for that matter),
> but I know that if you use a stainless steel bolt, you are NOT
> supposed to use a stainless steel nut or else the threaded area where
> they touch will corrode all to heck and you won't be able to get them
> apart. =A0 There is something, but I don't know what, about stainless to
> stainless and a lack of O2.
Stainless on stainless is used VERY frequently........why else would
there be a vast selection of SS bolts & nuts?
galling is a potential problem with SS on SS but the use of proper
plating or lubes will help a lot
cheers
Bob
PS stop using TV as an uncorroborated source of technical information
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> but I know that if you use a stainless steel bolt, you are NOT
> supposed to use a stainless steel nut or else the threaded area where
> they touch will corrode all to heck and you won't be able to get them
> apart. =A0 There is something, but I don't know what, about stainless to
> stainless and a lack of O2.