LaserPromise

Investigation of a high spatial resolution pretreatment process for the
age-resistant bonding of stainless steels:
Current pretreatment methods for stainless steels (e.g. sandblasting with silicate-coated corundum or wet chemical pickling) are not sufficiently resistant to ageing and particularly suitable for medical applications only to a limited extent, since the lack of local resolution leads to pretreated areas which are
are not coated with adhesive and the corrosion resistance is significantly reduced at these points. There is also the problem that, due to a lack of specialist knowledge, bonding technology is often not used for stainless steels, although compared to traditional joining methods (e.g. welding) it is often not used.
would be the more suitable joining method. Welding stainless steel is only possible to a limited extent and often at great expense. Bonding would be a real alternative for many products. The aim of the project is to research a pre-treatment process and to develop it both economically and
to technically evaluate stainless steels in order to bond them safely and with ageing stability, especially with regard to the special requirements of medical technology. In order to achieve this goal, the mechanisms leading to the failure of the bonded joints of stainless steels must first be investigated. These findings form the basis for the design of adhesives and bonding agent layers. The laser systems used for cleaning are modified to enable the deposition of adhesive layers. The desired process is not only widely used in medical technology. The combined cleaning by means of laser radiation and the simultaneous deposition of adhesive layers in combination with corrosion reduction suggests a broad application potential. Other conceivable applications can be found in bonding in the automotive sector and in pump construction. All applications in which bonds are exposed to corrosive media or high corrosive stresses can offer the desired process clear potential. It should also be mentioned that there are hardly any limits to the combination of adhesion promoter layers and adhesives with regard to concrete formulations, so that case-specific and optimum solutions can be developed for almost any application that currently requires conventional pretreatment. The
The technological basis for these developments will be developed with the   research results of this joint project.