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Surface Pretreatments

Most substrate materials in as-received condition (unprepared) are not receptive to adhesives and therefore require some form of surface pretreatment to improve their adhesion characteristics.

Surface pretreatment processes broadly fall into the following categories:

Mechanical

  • Cryoblasting
  • Gritblasting
  • Peel-ply
  • Silicon carbide abrasion
  • Sodablasting
  • Water jet
  • Wire wool

Chemical

  • Acid etching
  • Anodising
  • Detergent wash
  • Primer
  • Solvent cleaning

Physical

  • Corona discharge
  • Excimer laser
  • Flame
  • Plasma

 

For demanding applications combination of above pretreatments may be used to achieve optimum surface condition for initial adhesion and long term durability of bonded joints.

 

 

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