Car Paint Process

Car and vehicle painting processes have become increasingly advanced as manufacturers have increased their paint and warranty programs

The typical production vehicle will be composed of different metals typically steel and aluminum, plastics of differing types and increasingly composite materials, all requiring there own specialized preparation and painting processes

A typical zinc coated steel body would undergo chemical cleaning wash, rinse and dry, phosphate dip, rinse, dip cathodic electro primer, rinse and bake, electrostatic applied filler coat and bake followed by water based colour coat, force dry then 2 component acrylic clear coat and final bake using mechanical electrostatic or robotic application techniques. The three different bake cycles will range from 120C to 180C to fully cure each of the paint processes

The film thickness for this process is typically 100-120 micrometers total paint thickness

By accurately measuring the total film thickness a good indication of what may have happened to the vehicle and possible faults may be found, for instance low film thickness of paints can lead to poor durability and corrosion resistance, while high film builds can lead to softer more easily marked paint finishes from the original production but high film thickness can also indicate that a previous repair has been carried out .

Repair paint systems generally use low bake paint systems but care should be taken with repaired panels where the paint and zinc coating is removed in order to re shape the metal panel because it is not possible to reinstate the zinc coating to the original state.

 2010

Car and Vehicle Paint Inspections

                                                           Typical car paint process layers