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

[MerlinSub@t-online.de (Carsten Standfuß)]

"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