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Thread: Nasty rust removal

  1. #1
    Join Date
    Feb 2014
    Location
    Fort Worth, Texas
    Posts
    2

    Nasty rust removal

    Howdy all,
    I’m taking over a 6-year old Brewhouse. Rest of the vessels look to be in great shape, but when I went to take apart the heat exchanger to replace a bent outlet, I found...more rust than I’ve ever seen in a brewery.
    Like, flaming-off-steel-May-be-compromised amounts of rust. 98% of it is on the frame, only a little bit is on the plates themselves.

    So...rust removal. Hit it with some good Phos at 120-140? What say y’all?

    https://share.icloud.com/photos/0nCN...rth_-_Downtown
    https://share.icloud.com/photos/0e40...rth_-_Downtown
    https://share.icloud.com/photos/0PxT...rth_-_Downtown

  2. #2
    Join Date
    Sep 2012
    Location
    Moorhead, Minnesota
    Posts
    610
    30 volt, 10 amp power supply + a carbon fiber brush+ phosphoric acid makes a great rust removal/passivation tool in any brewery.

    https://m.youtube.com/watch?v=T595XvcW8cE

  3. #3
    Join Date
    Oct 2002
    Location
    Chesterfield, UK
    Posts
    1,904
    That looks more like a section of mild steel, not stainless it is so corroded. In which case the only answer is to replace that section with decent stainless, and then passivate. Even if it is meant to be stainless, it would appear to be of such poor quality that I would get it cut out and replaced with fresh 304 or 316 stainless.
    dick

  4. #4
    Join Date
    Aug 2010
    Location
    Enterprise, Oregon
    Posts
    1,929
    That's really bad!

    I'm with Dick on this--that isn't SS. It looks like a victim of galvanic corrosion. Is there copper plumbing connected to the HX?

    It seems the entire HX has been pretty well abused. That bent TC flange takes some doing.
    Timm Turrentine

    Brewerywright,
    Terminal Gravity Brewing,
    Enterprise. Oregon.

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