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  1. #1
    Join Date
    Jul 2020
    Location
    Sydney
    Posts
    3

    Default Aluminium Castings - Flux and melt Gas release alternatives

    Hi guys,
    i was watching myfordboy on youtube casting aluminium.

    i note that he uses salt and washing soda for flux and removing gases from the molten aluminium.

    Has anyone tried this, does it work as successfully as it seems to for myfordboy.

  2. #2
    Join Date
    Dec 2005
    Location
    South Australia
    Posts
    1,113

    Default

    Most casters I know use borax

  3. #3
    Join Date
    Dec 2007
    Location
    Sydney
    Posts
    153

    Default

    Bluey purple coloured tablets, probably borax.
    Ive possibly got the TAFE notes in the stash somewhere.
    H.
    Jimcracks for the rich and/or wealthy. (aka GKB '88)

  4. #4
    Join Date
    Apr 2018
    Location
    Drouin Vic
    Posts
    227

    Default

    I have used them and they seem to work just fine- although I am far from an authority. Lite salt is the stuff to use for flux- it is a blend of sodium chloride and potassium chloride. I wrap about a tablespoon of it in some alfoil, drop it into the pot and stir it in. Sodium carbonate- laundry soda- wrapped the same way and plunged into the bottom of the pot certainly brings a lot of bubbles to the surface. I bought some commercial stuff a few years ago but I have to travel half a day to any foundry supply so use DIY solutions.

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