Stainless and aluminium reaction

[BrendanChandler]

As most of us learn to our cost these two metals are inclined to attack each other.
I have a cockpit table held in place bu aluminium sockets recessed into the cockpit sole, into which fit stainless steel poles.

They bind together. I am now replacing the table and before assembling the units want to add a paste between the stainless and aluminium. I know that grease helps but am sure that there is something that does better.

Anybody know the solution?

Brendan

<hr width=100% size=1>
http://hometown.aol.co.uk/brendanchandler/index.html

 

[Strathglass]

Duralac from Z spars

cost about £10 a tube, lasts for ages.

Iain

<hr width=100% size=1>

 

[chriscallender]

There is a paste called duralac for this purpose. Available from some chandlers. I just bought a tube from mailspeedmarine.

Chris

<hr width=100% size=1>

 

[dog]

Had major probs with steel pushbike frame bonding itself to the seatpost (alu) I used stuff called copperslip which is an anti seize paste- no more probs. I have used it on many items since with excellent results.

<hr width=100% size=1>

 

[duncan]

Re: once they do bond....

...whats the best way to 'chemically' seperate.
I have a small slotted bolt in my windlass that is locked solid. It's stainless screwed into alloy.
Slot is still good, but even a really big s'driver doesn't shift it. Before moving onto impactdriver and club hammer what does teh pannel think would help?
(1) WD40 (no visible effect to date)
(2) hydrochloric acid (barnacle remover)
(3) sulphuric acid (from spare battery)
(4) oxalic acid (for cleaning hull)
(5) something else I don;t have lying around........

<hr width=100% size=1>

 

[Col]

Re: once they do bond....

Can you apply heat to it?

<hr width=100% size=1><A target="_blank" HREF=http://www.arweb.co.uk/argallery/colspics> Cols Picture Album</A>

 

[tome]

Re: once they do bond....

Try Coca-Cola. Seriously! I have never tried it but heard that it breaks down the bond if left to soak for a few hours.

<hr width=100% size=1>

 

[Strathglass]

Re: once they do bond....

That really works. Just try leaving a dirty penny in some coke for a day or two.

Iain

<hr width=100% size=1>

 

[duncan]

Re: once they do bond....

not quite sure how i get it to soak properly for a couple of hours - I need to get at the bits still stuck together!@ - However I wil lgive it a try

<hr width=100% size=1>

 

[ex-Gladys]

Re: once they do bond....

...JUDICIAL use of an impact driver... Any machine screw or bolt I'm unsure of the status of, I use the impact on from the start. that way I know I'll have the best head condition. Give it a reasonable clout (like say the third hit driving a 2" nail into wood) before beating the bejaysus out of it.

Impact driver and good quality screw drivers are the most important part of my toolkit, along with my 36" breaker bar for the socket set.

<hr width=100% size=1>Larry Botheras

Anderson 26 "Amber"

 

[duncan]

Re: once they do bond....

excellent and precise instructions - much more usefull than torque settings!

and yes - isn't mechanical advantage a wonderfull thing. A 36" tube can deliver incredible power to a socket.

now if only I can find the impact driver........

<hr width=100% size=1>