[NSRCA-discussion] Robart air can leak

[Jay Marshall]

Emptying can be the best part.
Is there a particular flux that will help the process John?
 
-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Ferrell
Sent: Sunday, April 30, 2006 3:03 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Robart air can leak
 
You can solder to aluminum with regular solder. The problem is an oxide lay
forms very quicky on aluminum. If you mechanically rub the solder blob with
the soldering iron through the blob to scrape away the oxide layer while it
is immersed in solder it will work fine. 
 
Try it on a beverage can. Don't forget to empty it first!
 
John Ferrell    
http://DixieNC.US
----- Original Message ----- 
From: Bob Richards <mailto:bob at toprudder.com>  
To: NSRCA Mailing List <mailto:nsrca-discussion at lists.nsrca.org>  
Sent: Sunday, April 30, 2006 8:36 AM
Subject: Re: [NSRCA-discussion] Robart air can leak
 
Instead of just applying the solder over the hole, try cutting a small patch
out of a soda can and lap-solder that over the hole. Of course, you need the
special aluminum solder, called "alum-alloy" or something like that.
 
Make sure the tank is vented while soldering.
 
Bob R.


Ken Thompson <mrandmrst at comcast.net> wrote:
Does anybody have any clue how I can repair a pinhole leak in a Robart air
cylinder?
 
For some reason there is a tiny leak in the side of the can.  Solder and
silver solder won't hold pressure.  I thought about JB weld for aluminum,
but I'm not sure that will hold 80 to 100 PSI either.
 
Any hints would be helpful, TIA.
 
Ken
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