The Istanbul plant is one of the most modern bus plants in Europe producing the following bus models
O 403
O 345 and
O 345 G.
Outside of Turkey, the sales designation O 350 is used for the
O 403.
The following illustration shows the corrosion protection measures performed at the Istanbul plant beginning with cleaning the unfinished body (skeleton), priming and painting, right up to hollow cavity preservation. The temperatures specified are based on the surface temperature of the buses.
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The following chapters and documents illustrate how reliable corrosion protection is achieved for the bus models produced in Istanbul by the use of design measures, production processes, painting procedures and use of special materials.
Steps 1 - 11 are performed in the Dauutpasa section of the plant, the actual paintwork beginning with Item 12 is completed in the Hosdere section of the plant.
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M98.00-0020-79
A Manual 1 Cleaning
2 Application of zinc dust paint
3 Coating of hollow cavities with zinc dust paint
4 Coating of roof/sides with spotwelding paste
5 Paneling and cleaning chassis
6 Application of filler, first coat
13 Sanding and cleaning body
14 Application of top coat
15 Evaporation
16 Application of clear paint (only for metallic paint)
17 Top coat drier, 80 °C, 60 min.
18 Preservation of hollow cavities
7 Filler drier, 130 °C, 30 min.
8 Filling work and seam sealing
9 Application of filler, second coat
10 Spraying underbody protection agent
11 Filler drier, 130 °C, 65 min.
12 Repair of flaws
M98.00-0021-76
Paint finish, coating thicknesses on skeleton frame
1 Primer with zinc dust paint 20 μm
2 2K thick layer filler 45 5 μm
Paint finish, coating thicknesses on paneling
Non-metallic paint
3 Sheet metal galvanized
zinc coating thickness approx. 20 μm
4 2K thick layer filler 70 110 μm
(total)
5 Top coat 45 5 μm
Metallic paint
3 - 4 same as above
5 Metallic base paint 20 5 μm
6 2K clear paint 45 5 μm
7 Structured effect paint 150 300 μm
(structured paint)
only luggage compartment, interior front end and stowage compartments
8 PVC plastisol 150 300 μm
9 Black matt paint 25 5 μm