Surface pre-processing techniques: Choice, testing, and benchmarking

To produce adhesive bonding joints, sufficient adhesion of the joined partners must be provided. To guarantee adhesion on real parts, surfaces must be pre-treated. In this process, adhesion is improved, and corrosion inhibiting coatings can be produced.
 

Competences and system technology

Mechanical methods:

• Sandblasting and particle blasting in vacuum
• Coating sandblasting SACO® for silication of joining part surfaces

Chemical methods:

• Flame pyrolysis to apply coupling agent coatings or nanostructured SiOx coatings
  
• Atmospheric pressure  – plasma processing for fine cleaning, activation and separation of coupling agent layers (plasma polymerization)

Laser-based techniques:

• Near-net-surface shape material removal and remelting with pulsed laser beam sources from UV to IR wavelength ranges (laser-micro structuring)
  
• Generation of periodic structures by means of the DLIP technology
• Large-surface structuring with cw beam sources (laser macro structuring)