Ask The Brewmasters

  • 1.  Best Chemistry for CIP of Hot Water Lines

    This message was posted by a user wishing to remain anonymous
    Posted 10-31-2025 19:41
    This message was posted by a user wishing to remain anonymous

    Hello Fellow Brewers,

    We have a 304 stainless loop around our brewery to recirculate 80 deg C. After some years, there is now a significant iron rust build up. Can any of the CIP experts recommend the best chemistry for CIP'ing this line?

    Thanks in Advance for Your Advice



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  • 2.  RE: Best Chemistry for CIP of Hot Water Lines

    Posted 11-07-2025 00:01

    It sounds to me that your stainless steel has not been regularly passivated and now started rusting as a result once it lost its passive layer. I would recommend running a strong Phosphoric Acid or Citric Acid solution first to remove the rust, followed by a thorough passivation with Nitric Acid. Try to passivate the lines at least annually or more frequently as needed (depends on your water and its constituents).

    You can contact me directly for more detailed directions and products.

    Cheers,

      



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    Dirk Loeffler
    Executive Vice President
    SEKA Chemicals
    (404) 600-1910
    loeffler.dirk@sekachemicals.com
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  • 3.  RE: Best Chemistry for CIP of Hot Water Lines

    Posted 11-07-2025 14:51

    I found this publication by NASA that would be of interest .

    ntrs.nasa.gov/api/citations/20110001362/downloads/...



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    Steven Smith
    Bionomics Ltd.
    Kitchener, Ontario
    905 334-5665
    ssmith@bionomics.ca
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    Original Message


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