Copper plating
as the term implies Copper plating is a condition in which
metal parts in the compressor become coated / plated with copper. This
condition is often observed in compressors which have a high moisture content
in the A/C system.
One possible cause of copper plating is that as moisture
(water) combines with the refrigerant, it forms an acidic solution; this
chemical may then dissolve or leach copper from other components in the A/C
system which are copper or contain copper-based alloys such as brass or bronze.
the copper is deposited on metallic parts of the compressor (i.e. Races,
Bearings, Centering ball, Fixed gear etc)
would have to be facilitated by the circulation of refrigerant, oil and
moisture in the A/C system. copper plating may have detrimental effect to the compressor durability.
There is large amount of copper in refrigerant systems in
the tubings and fittings. This copper deposits on the hot parts of the
compressor such as the bearings or the discharge valves.it may occur due to moisture Contamination allowed to enter and remain in the A/C System. This condition can be caused by
the following:
A) System leaks.
B) Improper Vacuuming of system.
C) Contaminated system components.
D) Contaminated refrigerant and / or oil.
E) Saturated or malfunctioning drier.
