Coating powder mixture

Details Coating powder mixture Coating powder mixture

1974-11-15

1976-04-27

Stallard, W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

B05D 108, B05D 500

Patent

active

039531937

ABSTRACT:
An article is provided with improved resistance to hot corrosion through a coating on a metal surface based on an element selected from Fe, Co and Ni, the coating comprising a filled matrix bonded by interdiffusion with the substrate. The matrix is applied by impinging on the substrate metal surface a plurality of heated metallic particles, such as by plasma spraying. The coating includes a filler metal of aluminum and preferably an alloy of aluminum and at least one other element, for example Cr, deposited on and interdiffused with the matrix, such as through a halide vapor deposition process employing a mixture of aluminum powder and other powders. As a result of application of the filler metal, there is provided from the matrix a coating layer of an alloy including an average of about 8 - 20 weight percent aluminum, the application process resulting in substantial recrystallization of the matrix.

REFERENCES:
patent: 3254970 (1966-06-01), Dittrich et al.
patent: 3257230 (1966-06-01), Wachtell et al.
patent: 3293007 (1966-12-01), Wukusick
patent: 3540878 (1970-11-01), Levine et al.
patent: 3594219 (1971-07-01), Maxwell et al.
patent: 3598638 (1971-08-01), Levine
patent: 3667985 (1972-06-01), Levine et al.
patent: 3676085 (1972-07-01), Evans et al.
patent: 3720537 (1973-03-01), Rigney

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