At this year's Bondexpo Plasmatreat will focus on how to bond sealing materials reliably to aluminum whilst at the same time ensuring a high level of corrosion protection. The company plans to showcase its two technologies – Openair® plasma and the PlasmaPlus® atmospheric plasma coating process – in live demonstrations that will enable visitors to experience the pretreatments at first hand.
First a 6-axis robotic cell will perform microfine cleaning, simultaneous activation and functional plasma nanocoating. The dual action of microfine cleaning and powerful activation in a single step is far more effective than conventional systems. Plasma treatment significantly increases the adhesion capacity and wetability of the material surface in a precisely adjustable manner. Apart from its suitability for in-line use, the main advantages this PlasmaPlus® technology has over other coating techniques is its local selectivity. It targets only those areas where it is actually needed. The coating provides adhesives and sealants with a secure, stable substrate as well as a high degree of corrosion protection, especially for aluminum alloys. The process is environmentally friendly, entirely dispensing with the need for disposal or treatment of chemicals.
Visitors can watch a digital animation of the plasma process on screen; the film shows the cleaning of an aluminum diecast housing, the activation of a plastic surface and the combined microfine cleaning and locally selective plasma coating of aluminum and subsequent adhesion in a continuous process.
The effectiveness of the corrosion protection is then demonstrated in a second, live presentation. Pretreated aluminum components housed in a spray chamber are exposed to a continuous mist of water for the entire duration of the trade show. The results are conclusive: whilst the uncoated areas quickly start to corrode, the plasma-treated areas remain smooth and pristine.