As part of the consultation hour, which has become established at the ZVO Surface Days, a presentation will also deal with the sealing of hard anodized coatings without perfluorinated and polyfluorinated alkyl compounds (PFAS).
Danger from PFAS
The presentation at the ZVO Surface Days will deal with various aspects of PFAS regulation and alternatives: The term PFAS covers several thousand chemical compounds that pose a danger to living beings and the environment due to their longevity. A draft ban was published some time ago for this group of substances, also known as perpetuity chemicals, which is currently still being evaluated by the ECHA. Regardless of the still pending legal regulation in Europe, there are already regional bans worldwide, which is why there is an urgent need for alternative solutions.
Search for substitutes
In the search for potential substitutes, a sealant based on an organic polymer with silane groups was selected, which in direct comparison to the previous solution even partially exceeds the functional properties. Various alternatives will be presented in the lecture and the results on the properties such as layer characteristics, coefficient of friction, corrosion or contact angle of the selected sealant will be presented. The focus of the application is on the sealing of hard anodized layers, but in principle other metallic materials and sub-layers can also be sealed.