Physical pre-treatment can improve the bond strength of the adhesive
significantly.
Corona Discharge
- The air
near the material surface is exposed to a high-voltage electrical discharge a
corona that
causes the oxygen molecules in the discharge area to divide into their atomic
form, which increases the surface tension and improves adhesion.
Major effect is a micro-roughening of the surface,
which enhances mechanical interlocking
Wettability and reactivity of the surface is increased
Change
