Is R22 - Chlorodifluoromethane corrosive?

[nicholaslsa]

Hi guys,

I'm new in RE, please help me out on this matter.

I've a problem in this refrigerant gas R22, a leak in the system as cause some paint to be "eaten up".

I'll like to know if R22 is corrosive? As I could not find any infomation of it on the net.

Thanks

[lowcool]

probably system oil reacting with paint

[Brian_UK]

Extreme temperature difference could have damaged paint.

Try searching the web again, there is a wealth of data sheets out there.

[Tesla]

Hi Nicholasla
Welcome to RE. R22 becomes acidic when exposed to moisture or over heating, the oil as mentioned above.

[lowcool]

use a better quality paint applied as per instructions,the only thing i know about 22 being corrosive is that it tends to scour the pipework due to velocity i think.

can anybody enlighten me on this autoduh has kicked in

[sterl]

All the HCFC and CFC refrigerants are solvents and most will dilute oil-based paints...and many familiar solvents were subject to the same limitations as refrigerants in consequence of the Montreal Protocol.

The original dry cleaning fluids are chemically similar to most refrigerants: This from Wikipedia:

Before they became strictly regulated, the general public often encountered haloalkanes (http://en.wikipedia.org/wiki/Haloalkane) as paint and cleaning solvents such as trichloroethane (http://en.wikipedia.org/wiki/1,1,1-Trichloroethane) (1,1,1-trichloroethane) and carbon tetrachloride (http://en.wikipedia.org/wiki/Carbon_tetrachloride) (tetrachloromethane), pesticides like 1,2-dibromoethane (http://en.wikipedia.org/wiki/1,2-Dibromoethane) (EDB, ethylene dibromide), and refrigerants (http://en.wikipedia.org/wiki/Refrigerants) like ***** (http://en.wikipedia.org/wiki/*****)-22 (duPont (http://en.wikipedia.org/wiki/DuPont) trademark for chlorodifluoromethane). Some haloalkanes are still widely used for industrial cleaning, such as methylene chloride (http://en.wikipedia.org/wiki/Methylene_chloride) (dichloromethane), and as refrigerants, such as R-134a (1,1,1,2-tetrafluoroethane (http://en.wikipedia.org/wiki/1,1,1,2-tetrafluoroethane)).
Haloalkenes have also been used as solvents (http://en.wikipedia.org/wiki/Solvent), including perchloroethylene (http://en.wikipedia.org/wiki/Perchloroethylene) (Perc, tetrachloroethene), widespread in dry cleaning, and trichloroethylene (http://en.wikipedia.org/wiki/Trichloroethylene) (TCE, 1,1,2-trichloroethene). Other haloalkenes have been chemical building blocks of plastics such as polyvinyl chloride (http://en.wikipedia.org/wiki/Polyvinyl_chloride) ("vinyl" or PVC, polymerized chloroethene) and Teflon (duPont (http://en.wikipedia.org/wiki/DuPont) trademark for polymerized tetrafluoroethene, PTFE (http://en.wikipedia.org/wiki/PTFE)).


So be careful what you use for a cleaner around refrigerants....Besides the carcinogenics, most of these are Central Nervous System depressants (and there's more fun ways to kill brain cells) and a few are hallucinogenic.