Coating of metal

Details Coating of metal Coating of metal

C - Chemistry, Metallurgy

23

C

6/3

C23C 11/00 (1980.01) C23C 3/00 (1980.01)

Patent

CA 1097454

ABSTRACT OF THE DISCLOSURE Aluminum diffusion can be effected from continuous coatings of leafing-type aluminum particles and such leafing coatings in very thin layers are more effective than coatings of non-leafing aluminum, with or without diffusion. Other protective metals in flake or leaf form can be substituted for or added to the leafing aluminum. This divisional application is particularly directed to diffusion masking wherein aluminum diffusion coatings are kept from undesired locations by covering those locations with an Ni3Al-type masking layer containing thermoplastic resin over which is applied a powdered nickel masking layer containing thermo- plastic resin. On firing, this masking combination forms a strong shell that effectively masks without contaminating the surrounding coating pack.

314511

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