UV-cured hybrid sol-gel coatings for aeronautical and Direct-To-Metal (DTM) applications
Corrosion protection in the aeronautic industry is a key issue. Nowadays, multilayer coatings are used to protect aeronautical metallic substrates. A typical system contains hexavalent chromium, or chromate, to provide high active corrosion protection, and is made up of three layers applied on a previously prepared surface. However, hexavalent chro