Corrosion protection in the cavity
Cavity structures of vehicle bodies form efficient constructions with high stiffness and crash protection relevance and therefore they must be protected against corrosion, especially in the presence of moisture.
Challenge
- During the KTL deposition process, incomplete coating may occur in sheet metal doublings (folds, gaps, welding spots ...)
- Movements such as torsion, vibration and oscillations of the car body can further damage KTL and hard coatings
- Moisture and salt collect in the cavity and then lead to crash-relevant corrosion at damaged points
Solution
- Establishment of a barrier between water and base material (barrier effect) by means of wax-based cavity coating with good creep properties.
- The coating quality is assured by optimizing the wax application (simulation)
- The waxes are air-drying and show high long-term flexibility
Sealed gap in the cavity
Sealed gap in the cavity
Benefit
- High safety due to flexible long-term corrosion protection
- Energy- and cost-efficient solution
- Reduction of costs in the development process through simulation of wax application
Sealed gap in the absence of KTL
Sealed gap in the absence of KTL