Aluminium soldering - which type of flux?

[Al D]

I need to fill a small hole in an aluminium engine casing. I have found some aluminium solder at Screwfix Direct. What sort of flux should I use when aluminium-soldering? Where can I obtain a small amount?

Thank you..

Al D

[Al D]

PS

Or... where can I obtain a short length of flux-cored aluminium solder?

Thanks

Al D

[Dave Plowman (News)]

A better answer would be something like JB Weld

[meow2222]

no that wont work. Al is oxide coated, so one has to apply heat & flux, then scrape the surface off under the flux before soldering is possible.

NT

[meow2222]

tap/die/bolt easier.

NT

[Dave Fawthrop]

|On Mon, 10 Jul 2006 19:05:38 +0100, Al D wrote: | |PS | |Or... where can I obtain a short length of flux-cored aluminium |solder?

I have a sample which I conned out of a salesman 25 years ago, and has been in my toolbox ever since, because "I may need it sometime" I doubt I will ever use it now. It is Alu-sol Multicore Type 45D 14SWG. about a foot long.

Work out my email address and I will post it to you. Put "solder" in subject line to foil my spam traps.

[Dave Fawthrop]

|Al D wrote: |> On Mon, 10 Jul 2006 19:05:38 +0100, Al D wrote: |>

|> PS |>

|> Or... where can I obtain a short length of flux-cored aluminium |> solder? |>

|> Thanks |>

|> Al D | |no that wont work. Al is oxide coated, so one has to apply heat & flux, |then scrape the surface off under the flux before soldering is |possible.

Reading the instructions which came with the stuff I offered.

I never used it, but rumour was that the flux was **STRONG**

larger heat source than usual. Aluminium itself must be heated until solder flows easily. Do not inhale fumes excessively

It is still in production google for alusol 45D

[Al D]

Good suggestion - but not possible in this case due to lack of space on the interior of the casing. It's hard to explain the details.

Cheers,

Al D

[Mark]

None as It wont work, you need low temp alloy brasing rods

DO try to find them somewhere cheaper then Frost !

-

[The Natural Philosopher]

I have had good success with Carrs aluminium flux.

I got mine from a model railway shop in Raynes Park, SW19..

[The Natural Philosopher]

Take that bit seriously. They are vile and lead to several days of illness.