Hi to all,

I am a newcomer on this newsgroup and you'll see me around as i'm starting
the construction of a new boat. I currently have a 34 feet powerboat in
aluminum and my nest boat will be a 44 or 45 steel sailboat. I'm looking at
building a Bruce Roberts design and i would like the deck superstructure to
be in aluminum. I've seen many commercial boat done this way and even old
Coast Guard patrol boat of 30+ years old without any corrosion problem so it
is something i'd like to do. But i can't find any industry that carries the
special strip that isolate both metals but still permit to weld them both.

Does someone ever see this ?

André

It used to be called "Datacouple". It's seems to have dropped off
Google's radar screen which essentially means non-existant now. The
only references I see are reviews of some old boats that use it.

It must still be around somewhere.

--

Roger Long



"André Langevin" wrote in message
...
Hi to all,

I am a newcomer on this newsgroup and you'll see me around as i'm
starting the construction of a new boat. I currently have a 34 feet
powerboat in aluminum and my nest boat will be a 44 or 45 steel
sailboat. I'm looking at building a Bruce Roberts design and i
would like the deck superstructure to be in aluminum. I've seen
many commercial boat done this way and even old Coast Guard patrol
boat of 30+ years old without any corrosion problem so it is
something i'd like to do. But i can't find any industry that
carries the special strip that isolate both metals but still permit
to weld them both.

Does someone ever see this ?

André

"datacouple" is actually "dEtacouple" and is very much still around
and used by everyone in that business. take a look at
http://www.dynamicmaterials.com/

It seems that ownership of the product has bounced around some, but it
is still available. Now, how an individual can buy it -- that's
another story.

Cheers,

Michael



"Roger Long" wrote:

It used to be called "Datacouple". It's seems to have dropped off
Google's radar screen which essentially means non-existant now. The
only references I see are reviews of some old boats that use it.

It must still be around somewhere.

--
Posted via a free Usenet account from http://www.teranews.com

Hi Michael,

This is very interesting. In fact i found the specification on the page
which is MIL-J-2445A
http://206.124.2.9/clad/pdf/marine_p...il-j-24445a%22

Now what puzzles me is that they claim that using a bimetallic join reduces
corrosion. I thought theese joint were *not* electrically bounded but they
are indeed.

So you have one big anode sitting on the top of your steel hull now. I
think the guess they are taking is the following:

A) The steel hull is absolutely and completely isolated from the sea water.
Any repair is done diligently
B) The superstructure is high enough not to be covered with water

I'm ok with condition A but condition B is very frequent on a sail boat. We
heel almost all the time and on the ocean the spray is constant.

Not sure anymore if it is a good idea but still searching...


"Michael Porter" wrote in message
...
"datacouple" is actually "dEtacouple" and is very much still around
and used by everyone in that business. take a look at
http://www.dynamicmaterials.com/

It seems that ownership of the product has bounced around some, but it
is still available. Now, how an individual can buy it -- that's
another story.

Cheers,

Michael



"Roger Long" wrote:

It used to be called "Datacouple". It's seems to have dropped off
Google's radar screen which essentially means non-existant now. The
only references I see are reviews of some old boats that use it.

It must still be around somewhere.

--
Posted via a free Usenet account from http://www.teranews.com

On Tue, 03 Oct 2006 07:50:54 -0400, Michael Porter
wrote:

"datacouple" is actually "dEtacouple" and is very much still around
and used by everyone in that business. take a look at
http://www.dynamicmaterials.com/

It seems that ownership of the product has bounced around some, but it
is still available. Now, how an individual can buy it -- that's
another story.

Cheers,

Michael

I like their NASDAQ ticker symbol: BOOM!

cheers,
Pete.

From 2 $ in Nov 05 to about 31 $ today... it is much more like a supersonic
BANG


"Pete C" wrote in message
...
On Tue, 03 Oct 2006 07:50:54 -0400, Michael Porter
wrote:

"datacouple" is actually "dEtacouple" and is very much still around
and used by everyone in that business. take a look at
http://www.dynamicmaterials.com/

It seems that ownership of the product has bounced around some, but it
is still available. Now, how an individual can buy it -- that's
another story.

Cheers,

Michael

I like their NASDAQ ticker symbol: BOOM!

cheers,
Pete.

Anyone looking to buy some detacouple can find it at Aluminum & Stainless, Inc. in New Orleans LA. 504-586-9191

Oh, hello neighbor. I didn't realize you hung around these joints

--

Roger Long



"Michael Porter" wrote in message
...
"datacouple" is actually "dEtacouple" and is very much still around
and used by everyone in that business. take a look at
http://www.dynamicmaterials.com/

It seems that ownership of the product has bounced around some, but
it
is still available. Now, how an individual can buy it -- that's
another story.

Cheers,

Michael

Roger Long wrote:
It used to be called "Datacouple". It's seems to have dropped off
Google's radar screen which essentially means non-existant now. The
only references I see are reviews of some old boats that use it.

It must still be around somewhere.


Detacouple or Deta-couple

Evan Gatehouse

I have just double check with my friend who worked as a welder for 35 years
in a shipyard that build commercial, coast guard vessels, battleships and
drilling platforms.
If you have an aluminums structure welding steel plates on or doing the
reverse was not in practice. Aluminums and mild steel or cold rolled steel
are not compatible. The same thing applies to welding stainless steel.
What takes place is a white inter granular corrosion that is hardly visible
to the naked eyes. Given time the white corrosion will cause a structural
failure. Not to mention the saline atmosphere at sea that will accelerate
the process.

"André Langevin" wrote in message
...
Hi to all,

I am a newcomer on this newsgroup and you'll see me around as i'm starting
the construction of a new boat. I currently have a 34 feet powerboat in
aluminum and my nest boat will be a 44 or 45 steel sailboat. I'm looking
at building a Bruce Roberts design and i would like the deck
superstructure to be in aluminum. I've seen many commercial boat done
this way and even old Coast Guard patrol boat of 30+ years old without any
corrosion problem so it is something i'd like to do. But i can't find any
industry that carries the special strip that isolate both metals but still
permit to weld them both.

Does someone ever see this ?

André