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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 (450) 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 Champion (820) 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 Champion (820) Pennsylvania Jul 12, 2009


  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 Champion (820) Pennsylvania Jul 12, 2009

    That should work fine.