Corrosion protection in cavities

The hollow-space structures in vehicle bodies are efficient designs that offer high rigidity and contribute to crash safety, but they are particularly susceptible to corrosion because moisture can penetrate them and has difficulty escaping. Without appropriate protective measures, corrosion often goes undetected for a long time.

Application
Vehicle Body Cavities
Exposure
Moisture, Salt & Vibration
System
Wax-Based Cavity Preservation System
Curing
Air-Drying / Permanently Flexible

Technical challenge

Moisture and condensation accumulate in hard-to-reach areas. At the same time, applying a uniform coating to these areas is technically challenging, as they are often not directly accessible.

Sealed gap in the cavity
Sealed gap in the cavity

Solution Concept

Wax-based, flowable corrosion protection systems are used. These systems spread even in complex geometries and reliably reach areas that are difficult to access.

Sealed gap in the absence of KTL
Sealed gap in the absence of KTL

Results & Benefits

Technical Value-Added

  • High flowability for complete wetting
  • Protection against moisture and corrosion
  • Flexible protective coating without embrittlement
  • Process advantages

  • High-quality workmanship in complex geometries
  • Uniform distribution within the cavity
  • Reliable application
  • Economic Effects

  • Reduction of corrosion-related damage
  • Longer service life of the body structure
  • Reduced maintenance requirements
  • Applications & Areas of Use

    Body cavities, profiles, and enclosed vehicle structures

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