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  1. #1
    Join Date
    Mar 2008
    Location
    NY NY
    Posts
    181

    Pit corrosion free cooling coils

    Just wondering has anyone seen this before. The building has 36 50 ton water cooled units with a open cooling tower. 20% of the free cooling coils have developed pit holes in tubes.
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  2. #2
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,922
    Moved to Commercial
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    How many times must one fix something before it is fixed?

  3. #3
    Join Date
    Mar 2008
    Location
    NY NY
    Posts
    181
    I started this thread hoping to gain insight to a condition that has developed in a building were my company has maintenance responsibities. With all the knowledge assembled in this forum I must say I find myself a little disappointed in the lack of replies. Is the condition I have that uncommon ? I have seen pit corrosion about 12 years ago however it was in a make up water loop not the main condenser loop. Come on guys I have a meeting Monday with the property manager and could use your help.

  4. #4
    Join Date
    Dec 2008
    Location
    Dixiana, AL
    Posts
    2,609
    I've seen formicary corrosion, sulfate-reducing bacteria, and a few others that I don't recall the names of, but have never witnessed under-deposit corrosion on the copper. Only thing I've seen that has caused issues on the copper parts is too much chlorine or too low of a ph level. Be interested to know how this turns out in case I ever do run across it.

    Don't be disappointed in the lack of response, kdoc. Water treatment is a specialty all unto itself, and is based on pure chemistry. All the commercial/industrial guys here deal with it and know some about the subject (shoot, I've been dealing with it's issues for my whole career), but that don't mean that we're comfortable giving out advice, and it really does no good to say "I've seen that - wish I knew what caused it".

  5. #5
    Join Date
    Mar 2008
    Location
    NY NY
    Posts
    181
    Thanks klove I will keep yoy posted

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