Re: [PSUBS-MAILIST] Hot-galvanize stainless steel ?

[Coalbunny <coalbunny@onewest.net>]

Why not use junk steel or iron from a junk yard?
Carl


Ray Keefer wrote:
> 
> Hi,
> 
> A big massive drop weight can be a problem if you ever intend on recovering
> it.
> 
> In Kittredge's book, "I Found Israel's Atom Bomb Factory" he mentioned one
> test of his drop weight system. Worked fine but he didn't want to leave
> all that lead on the bottom of the bay and asked a scuba friend to bring
> it back up. The weight was so heavy that bringing it up was troublesome.
> 
> His solution was to change his design to use a bunch of smaller weights
> bolted together. That way it could be brought up in chunks.
> 
> Regards,
> Ray
> 
> > Date: Thu, 24 Jan 2002 17:49:06 +0100
> > From: MerlinSub@t-online.de (Carsten Standfuß)
> > X-Accept-Language: de
> > To: personal_submersibles@psubs.org
> > Subject: Re: [PSUBS-MAILIST] Hot-galvanize stainless steel ?
> > Content-Transfer-Encoding: 8bit
> > X-Sender: 320000596261-0001@t-dialin.net
> >
> > "Dan H." schrieb:
> > >
> > > Carsten,
> > >
> > > Why not just weld in a stainless steel plate with your key way already
> > > in it into a hole cut in your steel weights.  Instead of cutting out the
> > > key in the actual steel weight, weld in a piece of stainless for the key
> > > to fit into.
> >
> > That it exact was I want to do. Maybe my description was a little short.
> >
> > > Even if you had the whole thing galvanized and it didn't
> > > take well to the stainless it wouldn't matter.  Actually, the part of
> > > the key way in contact with the key will probably wear through the
> > > galvanize in time anyway just from rocking back and forth in use, won't
> > > it?
> >
> > That is exact the question - would the galvanize hold on the stainless
> > - or not ? I think that if the zinc gives way from the key-hole - we
> > have a direkt contact from two parts of Stainless steel with a very
> > little
> > gap filled with saltwater between them - all the time in seawater -
> > maybe
> > the hole year. That should generate maybe a corrosion problem - and if
> > one of the key-hole surface has to much structure on it - the key will
> > not turn.
> >
> > Maybe it would be better to make the key-hole-plate  from normal
> > carbon steel. I am not affraid that the zinc gives way during
> > "Using the key". If I use it - the drop weights gives way and the
> > sub is not longer able to dive - so the weight will be lost and will not
> > repaint..
> >
> > >
> > > Just a question; why didn't you use lead for your drop weight?  There's
> > > so much more weight for the area it takes up.  A ton of old tire weights
> > > doesn't make that big of a pile.
> > >
> > Maybe I will do it - a drop weight build from 1/3 inch strong steel
> > plates
> > as a box - and than filled with lead. It will be depents on the final
> > weight calclulation - some month before CSSX contact the water in our
> > river.
> >
> > Carsten
> >
> > > Dan H.
> > >
> > > Carsten Standfuß wrote:
> > >
> > > > Hi submadmans and ironheads,
> > > >
> > > > One question about metalurgy :
> > > >
> > > > Is it possible to Hot-galvanize stainless steel ?
> > > >
> > > > I want to build the drop-weights from normal mild
> > > > and cheap steel and hot-galvanize it.
> > > > The release-key will be made from stainless steel (SS).
> > > >
> > > > For the reason that the welded key-hole inside the
> > > > dropweight can be made easy from the same plate as
> > > > the key and with the same waterjet cut - I ask this
> > > > unuseual question.
> > > >
> > > > drawing without scale : (and below 40 KB :-) )
> > > >
> > > > I = Stainless steel release key
> > > > O = Stainless s. hot galv.? key hole
> > > > = = mild steel hot galv.drop weight
> > > >
> > > > _____________________________________
> > > >
> > > >                  IIIIIIIturn90°
> > > >                  I
> > > >     =========    I    ========
> > > >    ==========OOO I OOO==========
> > > >   ===========  IIIII  ===========
> > > >
> > > > _________________________CS-1/2002___
> > > >
> > > > And please - I know that a full SS drop weight will fit
> > > > the problem.. .. but I have three weights of 1,3 ts -
> > > > means it generate another one..
> > > >
> > > > regards - Carsten

-- 
"To announce that there must be no criticism of the President, or that
we are to stand by the President, right or wrong, is not only
unpatriotic and servile, but is morally treasonable to the American
public." -- Teddy Roosevelt