1 Series E81 130i (N52K) 3-door
41 00 ...
Materials science
1. Aluminum
1.1 Chassis and suspension components
Read and observe the Notes on chassis and suspension components before handling aluminum.
1.2 Material influences
Causes
Effects / remedies
A galvanic element is created under the effects of moisture by contact
with materials such as copper, tin, nickel, iron and zinc.
This plating process causes aluminium
to be removed from the joint.
This results in surface corrosion or
pitting.
New parts and accessory parts which
have been approved by the BMW Group
for aluminum (screws, washers, nuts
etc.) have undergone special surface
treatment.
Such parts must not be replaced by
conventional parts.
Note:
Damaged parts lose this
protection and must be specially
coated or replaced.
Damage caused by contact
corrosion is excluded from the
warranty.
Materials also used for work on steel components can implant steel
particles in the softer surface of an aluminium component.
Surface corrosion or pitting occurs.
A separate tool kit is available for
processing/machining aluminum.
Surfaces are attacked when fluxing agents are used.
Soldering is not permitted for joining
aluminum components.
Risk of corrosion from chemical factors.
Aluminum/steel grinding dust from adjoining work areas.
This results in surface corrosion.
Erection of protective barriers.
1.3 Machining properties
Properties of aluminum compared with steel
Effects
Aluminum parts are magnetically neutral.
Attachment with magnetic tools/working
aids is not possible.
RA Materials science
BMW AG - TIS
22.01.2013 06:21
Issue status (12/2007) Valid only until next DVD is issued
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