Saab 2006 9-5, Owner'S Manual

Page: 248 / 288

248 Car care and technical information
Anti-corrosion
treatment
The entire car is corrosion-protected at the
factory in different stages by an electrolytic
immersion coating and a PVC-based pro-
tective coating to protect against corrosion
caused by stones flung up by the wheels. A
thin penetrating anti-rust oil is also applied
in cavities and body members.
In addition to conventional anti-corrosion
treatment like painting, underbody treat-
ment and cavity treatment, most of the body
panel surfaces are galvanized. These
include the hood, the doors and the under-
body.
The anti-corrosion treatment on the under-
side of the car and inside the wheel arches
is particularly exposed to constant wear and
possible damage, the degree of which will
obviously depend on driving conditions.
What causes rust?
Steel body panels of automobiles are sub-
ject to rusting whenever air and moisture
manage to penetrate the protective finish,
and body panels may rust through if the pro-
cess is unchecked. Rusting can occur wher-
ever water is trapped or where the car’s
panels are continuously damp. Damage to
paint and undercoating by stones, gravel
and minor crashes immediately exposes
metal to air and moisture. Road salts used
for de-icing will collect on the bottom of the
car and promote rusting. Areas of the coun-
try with high humidity have great potential
for rust problems, especially where salt is
used on roads or there is moist sea air.
Industrial pollution (fallout) may also
damage paint and promote rusting.
Preventive maintenance
The following procedures are necessary to
help protect against rusting. Refer also to
the terms and conditions of the Sheet Metal
Coverage described in the warranty book-
let.
1 Wash the car frequently, and wax at
least twice a year. Under adverse con-
ditions, where there is a rapid buildup of
dirt, sand or road salt, wash your car at
least once a week. After extreme expo-
sure to salted snow or slush, evidenced
by a white film on the car, wash the car
immediately. Frequent washing will pre-
vent paint damage from acid rain and
other airborne contaminants such as
tree sap and bird droppings. If any of
these contaminants are noticed on the
car the finish should be washed immedi-
ately.
• Begin washing by rinsing the entire car
with water to loosen and flush off heavy
concentrations of dirt (include the
underbody).
• Sponge the car with a solution of either
a good quality car soap or mild general
purpose (dish washing) detergent and
water.
• Rinse car thoroughly with clean water.
• After washing, check and clear all
drains in doors and body panels.
• Wipe the car dry, preferably using a
chamois.
95usM06.book Page 248 Thursday, November 17, 2005 8:59 AM