Base Paint Structure
Galvanized sheet metal on both sides
Only here do the cathodic protection and the zinc coating barrier effect work optimally together. Provide additional protection for the cutting edges.
Condition
Make sure that:
- All metal edges are properly deburred when performing a body repair.
- The zinc and cataphoretic layer is completely present on the interior surfaces that are not painted.
- The inner weld flanges and the sanded-through areas are reworked with Inox Spray D 007 600 A1 or zinc spray D 007 500 A2.
Smoothing Work
Pay attention to different base surface requirements.
Condition
- The metal filling paste requires a base surface that is bare metal and is as coarse as possible. The best adhesion and anti-corrosion properties can be achieved by using the Pneumatic Brush Grinder Set :VAS 6446 .
- Spray and polyester filler paste acts as a hydrophilic. That means they absorb moisture. Therefore bare metal base surfaces must be insulated. Use two-part wash primer LHV 043 000 A2 and then the two-part HS-performance filler as insulation before the filler paste.
Product information:
Primer
The primer is the most important component of the corrosion protection system, because it prevents water and oxygen from accessing the metal surface. Original replacement parts are coated with black or gray cataphoretic dip coating (CDC). The primer type is dependent on the area of application.
Condition
- Cataphoretic primer is not UV and acid resistant. Body components that are in the areas that are at risk, such as the front end, fenders and wheel housings, must then also be coated from the inside with a spray of base coat and clear coat. On inner-lying body surfaces, such as on the roof or side panels with a complete trim panel, it is sufficient if cracks and bare surfaces are sealed with glass/paint primer. In case of doubt, the production status applies.
- When body parts that have been worked on are delivered, watch out for any rust film. Cleaning or intermediate sanding may be necessary.
- Sanded-through areas or weld seams must be recoated as quickly as possible with corrosion protection.
- Areas sanded through to the base surface (bare metal) and that have had corrosion repair are to be primed with Two-Part Wash Primer LHV 043 000 A2 and then filled with Two-Part HS Performance Filler.
- Make sure that the Two-Part Wash Primer LHV 043 000 A2 is always mixed again before application, and that a dry coat thickness of at least 10 to 12 μm has been reached.
Product information:
- Refer to PRIMER METAL
- Refer to PLASTIC PRIMER
Filler
The filler contributes to corrosion protection to a lesser extent. A suitable filler is, however, essential in service.
Tasks:
- Filler protects the body from stone impact. Therefore pay attention to the appropriate layer thickness in the stone chip protection area.
- Filler serves as surface preparation. Sanding scratches can be smoothed out.
- Colored filler improves the coverage of colors with poor covering properties.
Product information:
- Refer to FILLER
PVC Sealed Seams and Underbody Protection
Condition
- The seam sealing is to be restored according to its original conditions in appearance and layer thickness.
- Sealing seams near attachments to be installed must be applied smoothly in order to avoid damage and malfunctions.
- Water drain holes must stay clear.
- All threaded pins and weld nuts with M-threads, as well as all other pins and contact surfaces for the assembly must be functional after the sealant application.
- The sealing material cannot be applied on uncoated sheet metal, but rather on filled surfaces.
To prevent any water from entering the flange, the notch is sealed with paste-like, solvent-free PVC in critical areas on the body. A PVC coating of different thickness is sprayed on specified areas on the underbody and in the wheel housings to protect against stone impact and engine humming.
Condition
- After a corrosion repair, insulate the bare metallic base surface with Two-Part Wash Primer LHV 043 000 A2 and then fill with Two-Part HS Performance Filler.
- For the underbody protection, pay attention to the specified layer thickness.
Product information:
- Refer to UNDERBODY PROTECTION
- Refer to STONE CHIP PROTECTION AKR 311 KD1 05
- Refer to STONE CHIP PROTECTION AKR 311 KD1 10
- Refer to SEALANT MATERIALS
Base Paint
The decorative application is the main consideration for base paint. This contributes to corrosion protection to a lesser extent.
Depending on the pigment content, the colors have different coverage. Pay attention to manufacturer information.
Data sheets:
- Refer to TWO-PART TOP COAT
- Refer to AQUAPLUS SOLID TOP COATS
- Refer to AQUAPREMIUM, TOP COATS
- Refer to READY-MIX TOP COATS
Clear Coat
For the clear coat, the decorative application is the prime consideration. The clear coat contributes to corrosion protection only to a lesser extent. The clear coat protects the top coat/base paint against UV radiation and environmental pollution such as acidic bird droppings.
Product information:
- Refer to CLEAR COATS
Conservation wax
The conservation wax/cavity sealants play a decisive role for corrosion protection. Depending on the area of application, different materials are available in service. The exceptional protective effects of these materials is based on the following characteristics:
- hydrophobic, water repellent
- good adhesion
- no rust formation
- water vapor permeability approximately 1, 500 times lower than with a paint coating of the same thickness
Product information:
- Refer to PRESERVATION
- Refer to UNDERBODY PROTECTION