PAINTING OF AUTOMOBILE Introduction: The corrosive nature of a metal used in a motor body construction, necessitate the application of an anti corrosion coating. For this reason the painting should be done. Function of Painting: 1. It reduces the corrosion and protect the vehicle body. 2. It is used for cleanliness. 3. It is used for esthetic appearance. 4. It is used to reduce the friction due to the aerodynamic drag and allow the vehicle in stream lining. 5. It is used for identification purpose. Requirements of Good Painting: 1. It should be anticorrosive nature. 2. It should protect the hidden parts also from the corrosion. 3. It should have esthetic appearance. 4. It should be smooth finish for stream lining. 5. It must reduce the aerodynamic drag. Main Constituents of paints: 1. Pigments 2. Drying oil 3. Thinners 4. Dry Extenders 5. Plasticizers 6. Resins. Reason for failures of paints: 1. Not proper cleaning of body before painting
PAINTING OF AUTOMOBILEIntroduction: The corrosive nature of a
metal used in a motor bodyconstruction, necessitate the application
of an anti corrosion coating. For thisreason the painting should be
done.Function of Painting:1. It reduces the corrosion and protect
the vehiclebody.2. It is used for cleanliness.3. It is used for
esthetic appearance.4. It is used to reduce the friction due to
theaerodynamic drag and allow the vehicle in streamlining.5. It is
used for identification purpose.Requirements of Good Painting:1. It
should be anticorrosive nature.2. It should protect the hidden
parts also from the corrosion.3. It should have esthetic
appearance.4. It should be smooth finish for stream lining.5. It
must reduce the aerodynamic drag.Main Constituents of paints:1.
Pigments2. Drying oil3. Thinners4. Dry Extenders5. Plasticizers6.
Resins.Reason for failures of paints:1. Not proper cleaning of body
before painting2. Not covering dents or spots.3. Not using of
proper good quality paint4. Not applied the pretreatment with zinc
phosphateDifferent Types of Painting1. Spray paint2. Hand
paintSpray Painting procedure: Now-a-days spray paintings are
largely use. Theprocedure is as follows:1. First of all the old
paint should be scrapped with the help of scrappers2. If there is
nail or any obstruction they will be removed with the help
ofpincers3. The removal of old paint must be by application of
caustic soda solutionandspirit solutions.4. In some portions
heating is necessary with the help of blow lamp forremoval of
oldpaint.5.The surface should be cleaned from dirt, dust, rust,
grease etc.6. The surface should maintain perfect level from any
kind of bends.7. Then once again clean with red oxide.8. After
wards duco paints or delux paints or required colour may be
sprayedon the vehicle as the primary coating.9. After first coating
is over we must see the variations of the surface clearlyand apply
second coating and it will finish the painting job and
givesbeautiful appearance.10. Then decoration and letter writing
finishes the body paint.11. Finally polish the vehicle
thoroughly.
