Method for coating metal surfaces

Details Method for coating metal surfaces Method for coating metal surfaces

C - Chemistry, Metallurgy

23

C

C23C 2/26 (2006.01) C23C 2/04 (2006.01) C23C 24/08 (2006.01)

Patent

CA 2465273

The invention concerns a method for continuously coating a moving substrate, preferably a steel metal strip, said coating deposited on the substrate comprising an ultrafine thickness between 20 and 2000 nm, and preferably between 40 and 500 nm. The invention is characterized in that the deposition is based on an aqueous solution containing oxide nanoparticles, and carried out in controlled pH conditions at high substrate temperature, preferably higher than 200 ~C, the duration of the deposition being less than 10 seconds, and preferably less than 2 seconds.

La présente invention se rapporte à un procédé pour revêtir en continu un substrat en mouvement, de préférence une bande métallique en acier, ledit revêtement déposé sur le substrat comprenant une couche ultra-fine d'épaisseur comprise entre 20 et 2000nm, et de préférence entre 40 et 500nm, caractérisé en ce que le dépôt est réalisé: à partir d'une solution acqueuse contenant des nanoparticules d'oxydes; dans des conditions de pH contrôlé; à haute température de substrat, de préférence supérieure à 200 ·C; la durée du dépôt étant inférieure à 10 secondes, et de préférence inférieure à 2 secondes.

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