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5 Damage prevention
5.4 Bolted connections
MITSUBISHI FUSO body/equipment mounting directives for FE Issue date: 20. 10. 2020
! Only print out complete sections from the current version
Preventing contact corrosion
Direct contact between materials with different
electrode potentials can lead to corrosion of the less
noble material when exposed to moisture and salt
ions.
When selecting materials, avoid the following
combinations:
• Chrome/nickel-steel with aluminium
• Chrome/nickel-steel with zinc-coated steel
Insulation by coating
Contact corrosion can be prevented by using
insulation such as washers, sleeves or bushings. Even
in this case, however, the connecting points must not
be persistently exposed to moisture.
Vehicle cleaning and care
When the vehicle is handed over to the body
manufacturer, it must immediately be cleaned of salt
and dirt. If it is to be stored for some time, the vehicle
must be preserved.
During modification it must be ensured that load-
bearing components are additionally protected
against aggressive chemicals and environmental
influences. If the vehicle comes into contact with
chemicals or salts (e.g. snow-clearing operations), it
must be cleaned thoroughly at regular intervals.
1Insulating washer
2Insulating sleeve
! Property damage
A conductive connection occurs if two different
metals are brought into contact with each other
through an electrolyte (e.g. air humidity). This
causes electrochemical corrosion and the less base
of the two metals is damaged. The further apart the
two metals are in the electrochemical potential
series, the more intense electrochemical corrosion
becomes.
For this reason, electrochemical corrosion must be
prevented by insulation or by treating the
components accordingly, or it can be minimised by
selecting suitable materials.
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