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Author: Subject: Cleaning CRT monitors
Crux Australis
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[*] posted on 17-3-2012 at 15:36
Cleaning CRT monitors


I'm trying to clean the grey coating - frit - from old CRT monitors, inside and out. I've found that alcohols (particularly methanol) clean it best, but it needs to be scrubbed quite vigourously. I'd really like a method which will dissolve the frit (which contains mostly PbO, but also may contain traces of mercury and cadmium) without scrubbing, so that I can automate the process and reclaim the chemicals for recycling. Anyone have any ideas or experience in this?
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watson.fawkes
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[*] posted on 18-3-2012 at 07:43


Quote: Originally posted by Crux Australis  
I'm trying to clean the grey coating - frit - from old CRT monitors, inside and out. I've found that alcohols (particularly methanol) clean it best, but it needs to be scrubbed quite vigourously. I'd really like a method which will dissolve the frit (which contains mostly PbO, but also may contain traces of mercury and cadmium) without scrubbing, so that I can automate the process and reclaim the chemicals for recycling. Anyone have any ideas or experience in this?
Idea: Acetic acid should dissolve your mixed PbO. I don't know how fast, though.
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Rosco Bodine
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[*] posted on 18-3-2012 at 14:30


Nitric acid or aqua regia are candidates, and methane sulfonic acid and sulphamic acids could be useful also.
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marko
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[*] posted on 19-3-2012 at 01:00


The grey coating is aquadag (pretty much straight graphite).
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neptunium
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[*] posted on 19-3-2012 at 07:24


the inside also contain some rare earth oxides and aluminum fine powder HCl should take care of that



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