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  1. #14
    Join Date
    Jul 2018
    Location
    Wisconsin
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    Thread Starter
    Looks like it is indeed the propionic acid. The following was the conclusion of a study from the Journal of Brazilian Chemical society. If I knew exactly what it meant I would have been a chemist. All I know is it dosnt like CU.

    "From the results obtained here, the deterioration of copper in presence of propionic acid vapors can be explained through the following mechanism: The first oxide layer that covers the surface of copper and which is instantly formed is cuprite (Cu2O). This compound, in presence of adsorbed water is oxidized to tenorite (CuO) simultaneously with pH increase. The hydration of the tenorite layer induces the formation of a hydroxide such as CuO.xH2O. As the pollutant level increased in the atmosphere, a basic propionate of the type Cu(OH)x(CH3CH2COO)2-x is formed. Higher concentrations of propionic acid in the atmosphere acidify further the monolayers and a new compound Cu(CH3CH2COO)2•H 2O begins to precipitate at low pH. This is the main constituent of the green olive soluble patina formed under these conditions."





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  2. #15
    Join Date
    Mar 2015
    Location
    Medford, N.Y.
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    4,896
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    Hey, Spitz!!!!! Do we have to memorize that?????????????

  3. #16
    Join Date
    Oct 2011
    Location
    Harrisburg, NC
    Posts
    1,042
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    I hope not. I may have to skip that question.


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    I can't fix it if it won't stay broke..

  4. #17
    Join Date
    Jul 2018
    Location
    Wisconsin
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    Thread Starter
    Yes all the SMILES (Simplified Molecular Input Line Entry System) will be on your chemistry test

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  5. #18
    Join Date
    Oct 2011
    Location
    Chicagoland Area
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    6,559
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    Quote Originally Posted by TechmanTerry View Post
    Hey, Spitz!!!!! Do we have to memorize that?????????????
    They wrote a song about the formula
    https://youtu.be/dFOJs8laZuU
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  6. Likes Spitz liked this post
  7. #19
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    29,075
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    Quote Originally Posted by Spitz View Post
    We have problems with RTUs in there production areas. A greenish corrosive slime on the u-bends. Clean it off and hit it with leak bubbles and its millions of pinholes foaming on every u-bend. Replaced a few coils in the RTUS with coated and they are holding up OK. Trane is starting to use microchannel aluminium evaporator coils in there voyagers. I would like to try one and see how it holds up next time they replace one.
    I have a site with three year old voyagers and the evaps have been replaced by Trane....TWICE.

    No chocolate. Just a discount clothing store.
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    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
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