[3dem] [External] Re: Cooling water

[Morgan, David Gene]

Hi,

We use grocery-store purchased distilled water. This is what our microscope company engineers always use, and we've had no issues with corrosion. One system had a nasty, hard to kill cyanobacterial infection, but that's the only issue here in 20+ years.


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                                             A. Einstein

            David Gene Morgan
        Electron Microscopy Center
             047E Simon Hall
             IU Bloomington
          812 856 1457 (office)
          812 856 3221 (3200)
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________________________________
From: 3dem <3dem-bounces at ncmir.ucsd.edu> on behalf of Tim Gruene <tim.gruene at univie.ac.at>
Sent: Friday, February 9, 2024 6:31 PM
To: Ruben Diaz <pindusito at gmail.com>
Cc: 3DEM Mailing List <3dem at ncmir.ucsd.edu>
Subject: [External] Re: [3dem] Cooling water

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Dear Ruben,

we use singly distilled water, buffered to pH 7.5-pH8 with baking
powder or Na-phosphate buffer. It should not be sour to prevent
corrosion. We also add Thermoclean Blue to keep  algae and bacteria
out, and refresh the Thermoclean annually.

Best,
Tim


On Fri, 9 Feb 2024 14:32:26 -0800 Ruben Diaz <pindusito at gmail.com>
wrote:

> Hi all,
>
> I have a silly question: what type of water do people use to keep the
> microscopes happy and chilled? We have already had two instances of
> corrosion on the cameras (K3), which have resulted in uber-pricey
> repairs, but the other parts of the microscopes seem perfectly fine
> and corrosion-free. The water does not show any unusual hardness or
> presence of ions that could be blamed for the corrosion. I am very
> interested to hear if other people have faced similar problems, and
> how they have been solved.
>
> Ruben.



--
--
Tim Gruene
Head of the Centre for X-ray Structure Analysis
Faculty of Chemistry
University of Vienna

Phone: +43-1-4277-70202

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