Heat exchanger, method for fluorination of the heat...

F - Mech Eng,Light,Heat,Weapons – 28 – F

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F28F 19/04 (2006.01) H01M 8/02 (2006.01) H01M 8/04 (2006.01) H01M 8/06 (2006.01)

Patent

CA 2461523

A heat exchanger having an excellent corrosive resistance against water and steam and suitably used particularly for fuel cells, comprising a heat exchanger component member having a fluoride layer (10) formed on the surface layer part thereof, wherein the fluoride layer (10) is desirably within the range of 2 nm to 10 µm in thickness and desirably formed on a base material (1) through an intermediate layer (2), the component member is desirably at least either of a fin and a plate, and the intermediate layer (2) desirably contains an anode oxidized layer (3) or/and a nickel plated layer (4).

L'invention concerne un échangeur thermique présentant une excellente résistance à la corrosion par l'eau et la vapeur, cet échangeur pouvant être utilisé en particulier dans des piles à combustibles. L'échangeur thermique selon l'invention comprend un élément constitutif pourvu d'une couche de fluorure (10) formée sur la partie couche de surface de l'échangeur, l'épaisseur de cette couche de fluorure (10) étant de préférence comprise entre 2 nm et 10 µm, ladite couche étant formée de préférence sur un matériau de base (1), à travers une couche intermédiaire (2). L'élément constitutif est de préférence au moins soit une ailette soit une plaque, et la couche intermédiaire (2) contient de préférence une couche oxydée anode (3) et/ou une couche à revêtement de nickel (4).

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