Strengthening method for flame sprayed film

Details Strengthening method for flame sprayed film Strengthening method for flame sprayed film

C - Chemistry, Metallurgy

23

C

C23C 4/18 (2006.01)

Patent

CA 2227742

A method of strengthening sprayed coatings by densifying the pores present therein, which comprises sealing the pores with a sealant at the stage of forming a sprayed coating thinner than the final one, drying the sealant sufficiently for solidifying the same, continuing the formation of a sprayed coating, and repeating, if necessary, the above procedures. As a result, the sprayed coating is improved in the resistance to abrasion, corrosion, heat, etc., and the service life of the structural members coated therewith is lengthened.

L'invention concerne un procédé pour renforcer des revêtements pulvérisés par densification des pores qui y sont présents. Ce procédé consiste à sceller les pores avec un matériau d'étanchéité lors de l'étape de formation d'un revêtement pulvérisé plus fin que le revêtement final, à sécher le matériau d'étanchéité suffisamment pour permettre sa solidification, à continuer la formation d'un revêtement pulvérisé, et à répéter, si nécessaire, les modes opératoires précités. Par suite, le revêtement pulvérisé est amélioré au niveau de la résistance à l'abrasion, à la corrosion, à la chaleur, etc., et la longévité des éléments structuraux ainsi revêtus est accrue.

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