The REACTION of CFC IN the REFRIGERATION MATERIALS - Metals
The most commonly used construction of metals, such as steel, cast iron, brass, copper, tin, lead, aluminum, can be used satisfactorily Freon connection under normal conditions of use. At high temperatures, some metals can act as catalysts for the campsite. Trend metals for the promotion of thermal decomposition of CFCs compounds in the following General procedure, with those metals which progresses thermal decomposition of the first in the list:
- Inconel
- Stainless steel
- Nickel
- 1340 steel
- Aluminium
- Copper
- Bronze
- Brass
- Silver
On the order above is only approximate. Exceptions can be found with the individual compounds Freon or for special applications. Magnesium and aluminum alloys containing more than 2% magnesium, is not recommended for use in systems containing Freon connections, if the water can be present. Zinc is not recommended for use with Freon 113. Experience zinc and other compounds Freon has been limited, and any unusual reactivity was observed.
However, it is more than other chemically active General construction, metals, it would seem wise to avoid using this with Freon connection with a lack of adequate testing is carried out.
Some metals can be no doubt for use in applications requiring contact with Freon compounds for a long time or unusual conditions of irradiation. These metals, however, can be cleaned safe CFC solvents. Cleaning applications usually for short exposures at moderate temperatures.
Most halocarbons may react vigorously with highly chemically active substances, such as sodium, potassium, barium in free metallic form. Materials become more reactive when finely ground, or in powder form. In this state, magnesium and aluminum can react with fluorocarbons especially at high temperatures. The highly radioactive material must not be put in contact with fluorocarbons, while careful study and appropriate precautions taken...
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Refrigerants