Volkswagen Golf Service & Repair Manual: Effects on metal
In its pure state, refrigerant R134a is chemically stable
and does not attack iron or aluminium. |
However, impurities such as chlorine compounds in the
refrigerant do attack certain metals and plastics. This can lead
to blockages, leaks and deposits on the air conditioner
compressor piston. |
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Critical temperature and critical
pressure |
Up to a gas pressure of 39.5 bar positive pressure
(corresponding to a temperature of 101°C) the refrigerant R134a
remains chemically stable; however, above this temperature the
refrigerant decomposes (see Combustibility). |
|
In an enclosed container that is not completely full,
refrigerant evaporates as vapour at the surface in a quantity
sufficient to form an equilibrium between vapour a ...
Only very small amounts of water are soluble in liquid
refrigerant. On the other hand, refrigerant vapour and water
vapour mix in any proportion.
...
Other materials:
Tyre monitoring indicator lamp
First read and observe the introductory information
and safety warnings
Lit up
Possible cause
Solution
The tyre pressure of one tyre or several tyres has decreased considerably
in comparison to the tyre pressure set by the ...
Seam seals, body of CNG-powered vehicles
Note
Seam seals made during repair work must be identical in
appearance and thickness to the original seam seals.
To avoid damage or faulty operation, brush seam seals smooth
near attachments which must be attached.
...
Contact corrosion
Contact corrosion can occur if unsuitable connecting
elements (screws, bolts, nuts, washers, etc.) are used.
For this reason, only connecting elements with a special
surface coating are fitted in the vehicle.
Moreover, c ...
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