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Posted by JIMMIE on May 19, 2009, 3:13 pm
show/hide quoted text
> > > 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=
> > > >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
show/hide quoted text
>> > 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!
show/hide quoted text
> 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=
> >> > >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
show/hide quoted text
> > > 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=
> > > >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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Posted by fftt on May 19, 2009, 9:15 pm
show/hide quoted text
> > 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). =A0I think it's more
> likely that moisture was getting into those hidden areas and staying
> there longer.
> R
........ Oxygen is inseparable from oxidation (rusting).
yup
..... I think it's more likely that moisture was getting into those
hidden areas and staying
there longer.
yup, again
first of all the term "stainless steel" though popular & widely used
is not the "correct" term for the material under discussion
the more correct terminology is "corrosion resistant"
btw all "stainless steels" will rust / corrode under the "right"
conditions
another little know fact, so called "non-magnetic", 18-8 stainless
steels (typically 300 series) can, when "worked" by certain processes,
in fact, exhibit magnetic properties
cheers
Bob
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> > > wrote:
> > > >I would like a link to that! I was told non magnetic stainless doesn=
> > > >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 -