Corrosion protection is an integral part of the aircraft based on almost 25 years of CL-215 salt water operation experience. All parts are completely treated for corrosion prevention before assembly.
- Aluminum alloy is sulphuric-anodized and epoxy-primed. Polyurethane paint is applied in areas where inspections are required.
- Steels are cadmium plated and chromated. Epoxy primer is applied and, if required, polyurethane painted.
- All fasteners are "wet" installed with sealant. Faying (overlapping) surfaces are also wet-sealed.
- Water-displacing, corrosion-inhibiting compound is applied.
2024 base metal: Aluminum-copper alloy with pure aluminum cladding. Alloy exhibits superior corrosion resistance properties. Cladding provides a uniform surface for anodizing.
- Sulphuric acid anodizing
Transforms surface to a fine layer of aluminum oxides which protects the surface. Also increases abrasion resistance.
- Dichromate seal
Seals pores on the anodized surface. Chromate additives in the seal adds to the corrosion resistance.
- Epoxy primer
Promotes adhesion of the top coat. Also contains strontium chromate which neutralizes water and prevents it from reacting with the base metal.
- Polyurethane topcoat
Adds an additional barrier to protect from infiltration of corrosive contaminants. Also increases visibility for maintenance inspections.
Is a water displacing, corrosion inhibiting compound. Renders the coating non-permeable. Especially beneficial in adjoining parts.