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What is the "Proper" Material by Lou6t4gto
Started on: 10-13-2014 06:39 PM
Replies: 6 (309 views)
Last post by: Dennis LaGrua on 10-15-2014 11:10 PM
Lou6t4gto
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Report this Post10-13-2014 06:39 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
What is the right stuff to "solder" aluminum, I know it's not acid core solder , is it ? For trying to repair a leak in an Evaporator core (Has to be able to hold the high pressure gas.) I used acid core solder before "thinking". It holds 30 PSI Vacuum, but 300PSI Pressure is a different story, don't know I would trust it. Thanks for Input.
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NW-Fiero
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Report this Post10-13-2014 07:06 PM Click Here to See the Profile for NW-FieroSend a Private Message to NW-FieroEdit/Delete MessageReply w/QuoteDirect Link to This Post
Here is a good blog on the subject.

http://www.crownvic.net/ubb...wflat&Number=1503580

Good Luck

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' 85 2m6 3.4PR
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Orig88GT-NC
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Report this Post10-13-2014 10:18 PM Click Here to See the Profile for Orig88GT-NCClick Here to Email Orig88GT-NCSend a Private Message to Orig88GT-NCEdit/Delete MessageReply w/QuoteDirect Link to This Post
For light aluminum repairs/fabrication, I've had pretty good success with Durafix.
( www.durafix.com ) may work for what your doing..
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sardonyx247
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Report this Post10-14-2014 04:08 AM Click Here to See the Profile for sardonyx247Click Here to visit sardonyx247's HomePageClick Here to Email sardonyx247Send a Private Message to sardonyx247Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Orig88GT-NC:

For light aluminum repairs/fabrication, I've had pretty good success with Durafix.
( www.durafix.com ) may work for what your doing..


There is also alumaweld <-brandname
and Harbor Freight sell a copy of the 2 also http://www.harborfreight.co...ding-rods-44810.html

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cmechmann
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Report this Post10-14-2014 08:46 PM Click Here to See the Profile for cmechmannClick Here to Email cmechmannSend a Private Message to cmechmannEdit/Delete MessageReply w/QuoteDirect Link to This Post
Alumaweld works well the Harbor Freight stuff I only trust for cosmetic fills.
When working with Alumaweld stuff. You are really soldering with a zinc alloy. The part has to be absolutely clean and you have to use the flux that you can by with alumaweld. This raises the aluminum oxide(you can't see it) off the part. Don't use a steel brush to clean. If you have to use a brass brush. Small steel particles can get embedded in the aluminum and make it hard to repair.
I found on larger parts, it helps to "warm" the part over small burner like a Coleman stove at low temp to keep the part temp even so you don't get cold spots in your repair. Heat the part, not the rod. Keep you torch flame low enough on your part just to melt the rod. Too much heat causes scorching and you will have to clean again. Before running your bead, use the rod to "push" more of the oxide off. Then quickly go back and run the bead.
When you finish wash off any flux. The flux can attack the aluminum if left on long enough.
Aluminum by itself is a very reactive metal. It very quickly reacts with oxygen and creates a layer of aluminum oxide. It is so thin you can't see it. Aluminum oxide is so hard, it is the redish stuff that is on sandpaper. And not much likes to stick to it.
When you use a TIG welder the helium, argon or CO2 is what keeps the aluminum from reacting with the oxygen.
The flux for Alumaweld breaks down the aluminum oxide so you can get something to stick to the aluminum.

[This message has been edited by cmechmann (edited 10-14-2014).]

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Lou6t4gto
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Report this Post10-15-2014 12:08 AM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
Thanks
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Dennis LaGrua
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Report this Post10-15-2014 11:10 PM Click Here to See the Profile for Dennis LaGruaClick Here to Email Dennis LaGruaSend a Private Message to Dennis LaGruaEdit/Delete MessageReply w/QuoteDirect Link to This Post
There is low temp aluminum solder and there are also aluminum brazing rods. Use the solder for fills and radiator repair work and the brazing rods for places that you want strong joints as on automotive brackets, A/C parts and special fittings. The alumaweld soldering rods and aluminum brazing rods should be flux coated.

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