Appliques providing corrosion protection

C - Chemistry – Metallurgy – 09 – J

Patent

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154/92

C09J 7/02 (2006.01) B32B 7/12 (2006.01) B32B 15/08 (2006.01)

Patent

CA 2272602

Increasingly stringent environmental restrictions make it challenging to apply coatings (i.e., paint) by conventional processes like spray painting because of the volatile solvents and hazardous pigments. The environmental scrutiny is particularly focused upon conventional corrosion protection surface treatments, especially chromated primers and conversion coatings. We apply appliques (10) to provide a vapor barrier over the substrate to provide corrosion protection. We can make curved appliques on a family of molds of different Gaussian curvature and thereby avoid making a "splash" mold of the surface of interest to create the appliques. Using curved appliques reduces ridges, creases, or gaps that sometimes otherwise occur with attempts to cover a surface with complex curvature with flat (planar) appliques.

Les restrictions environnementales toujours plus rigoureuses rendent plus difficile l'application de revêtements par des procédés habituels tels que la peinture au pistolet à cause des solvants volatils et des pigments dangereux. L'étude minutieuse de l'environnement est essentiellement axée sur les traitements habituels de protection de surfaces contre la corrosion, notamment les apprêts chromatés et les revêtements par conversion. Nous appliquons des films (10) en vue de fournir un écran antivapeur sur le substrat permettant de le protéger contre la corrosion. Nous produisons des films à appliquer courbés à partir d'une famille de moules présentant différentes courbures gaussiennes au lieu de réaliser un moule "par projection" sur la surface concernée afin de former les films à appliquer. L'utilisation de films à appliquer courbés réduit les nervures, les plis et les fentes qui apparaissent parfois lorsque l'on essaie de recouvrir la surface avec des films à appliquer plats (plans).

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