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Thread: White deposition (crystal) forming on painted metal surfaces.

  1. #1 White deposition (crystal) forming on painted metal surfaces. 
    Forum Professor Zwolver's Avatar
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    So, i have another nice mystery.

    In some rooms in my lab, i have found small/medium sized crystal forming on painted metal, or plastic covers over glass surfaces.

    I tried to define what the crystal is. But i came up blank so far.

    I could measure a bit of the following elements/compounds (calculated in mg/l with estimate of 50mg in 1ml. So about 50g/l total dissolved. I rounded the numbers so they would be more clear.

    S (non SO4) 190 mg/l
    Cl 50 mg/l
    K 27 mg/l
    Ca 4 mg/l
    Mn <0.05 mg/l
    Fe 0.4 mg/l
    Cu 2 mg/l
    Zn 2 mg/l
    Br 0.7 mg/l
    PO4 0.2 mg/l
    F 9 mg/l
    NO2 0.1 mg/l
    NO3 19 mg/l
    SO4 27 mg/l
    NH4 <0.01 mg/l

    Ph 9.5
    Ec 850..

    I am missing about 70-80% of anions. and about 90% cations according to ion ratio. Mass wise i am missing about 99,3% of mass (estimated)

    I will try FT-IR next.

    The large anion, is most likely (hydrogen)Carbonate. But i am at a loss what the kation could be. I thought ammonium but that one came up blank.

    The room has a gas washing system inside, which most likely causes the contamination of the air inside, for crystals to grow.


    Growing up, i marveled at star-trek's science, and ignored the perfect society. Now, i try to ignore their science, and marvel at the society.

    Imagine, being able to create matter out of thin air, and not coming up with using drones for boarding hostile ships. Or using drones to defend your own ship. Heck, using drones to block energy attacks, counterattack or for surveillance. Unless, of course, they are nano-machines in your blood, which is a billion times more complex..
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    Forum Professor Zwolver's Avatar
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    Measured FT-IR on a gas washing regeneration salt from the system, and it contained Thenardite and a phosphate zinc soap (cant remember exact structure but had 11C atoms). But a significant other fraction it cannot measure properly (most likely Na/K/Mg-F/Br/Cl). But i cannot figure out how crystals would just form like that on a surface.

    Can crystals grow from this over a distance, in a "normal" atmosphere?


    Growing up, i marveled at star-trek's science, and ignored the perfect society. Now, i try to ignore their science, and marvel at the society.

    Imagine, being able to create matter out of thin air, and not coming up with using drones for boarding hostile ships. Or using drones to defend your own ship. Heck, using drones to block energy attacks, counterattack or for surveillance. Unless, of course, they are nano-machines in your blood, which is a billion times more complex..
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