The lamella structure and lack of metallurgical bonding in thermally spayed coatings influences their
corrosion properties significantly. Corrosive media can penetrate between the lamellas in the coatings
and finally reach the substrate material. The current paper presents results from corrosion
characterisation of different thermally sprayed coatings both as sprayed and post-treated. The coatings
studied include pure metallic and ceramic-metallic coatings. The coatings were post-treated with
processes including use of sealant, use of a self-protective boronising paste and laser re-melting.