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What is the proper way to passivate aluminum?

Discussion in 'Homebrewing' started by blacklabelbrewer, Apr 1, 2012.

  1. I have read three methods:
    A. Bake the kettle for 15 min @ 350F in an oven.
    B. Boil 3 to 4 inches of water until it all evaporates.
    C. Boil 5 gallons of water for 15 min.


    Has anyone preformed any of the methods above with successful results? Or better yet, does anyone have any other way to passivate a new aluminum kettle? Thank you for your time, cheers!
  2. Agold

    Agold Advocate (510) Pennsylvania Mar 13, 2010

    Fill the pot with water, put the lid on, and boil for ~20 mins.
  3. billandsuz

    billandsuz Savant (380) New York Sep 1, 2004

    i am far from a metallurgist though i recall that the oxidation of the aluminum surface is enough for our purposes. you don't need to do anything to an aluminum pot for it to be usable. and i can't remember anyone ever stating that their aluminum pot failed a batch because it was not properly treated.

    also, i have been using aluminum for decades so my memory is shot...
  4. VikeMan

    VikeMan Advocate (740) Pennsylvania Jul 12, 2009

    D. A couple inches of water. Boil (lid on) until kettle inside surface is 'grey'. It happens fairly quickly.
  5. VikeMan

    VikeMan Advocate (740) Pennsylvania Jul 12, 2009

    [​IMG]

  6. And this is the reason why I love this website. You guys are awesome hahaha
  7. So my kettle was really inexpensive and didn't come with a lid ha. Would a metal baking sheet be a suitable replacement lid?
  8. VikeMan

    VikeMan Advocate (740) Pennsylvania Jul 12, 2009

    That should work fine.

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