Corrosion resistant stainless steel

Details Corrosion resistant stainless steel Corrosion resistant stainless steel

1992-07-15

1993-03-23

Walsh, Donald P.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428553, 428655, 428681, 428682, 428683, 428684, 428685, B22F 0000

Patent

active

051962721

ABSTRACT:
The corrosion resistance inherent in stainless steel is further improved by a cladding layer provided on the surface thereof. The cladding layer is formed of a coating material which is applied onto the surface of the stainless steel and, then, burnt to be fused by laser beams. The coating material contains a larger amount of Cr than that of the stainless steel. The thus fused material and a fused portion of the stainless steel are mixed with each other to form the cladding layer of remarkable corrosion resistance due to a larger amount of Cr contained therein. The formation of the cladding layer on the inner surface of a small diameter pipe is enabled by a coating film shaping device which has a jig for shaping the applied material into a film of a uniform thickness and by a laser irradiation torch which has an arrangement for emitting the laser means radially outward from the inside of the pipe.

REFERENCES:
patent: 2461518 (1949-02-01), Chace
patent: 3753704 (1973-08-01), Manilla et al.
patent: 4431447 (1984-02-01), Schick
patent: 4496635 (1985-01-01), Wang et al.
patent: 4530719 (1985-07-01), Johnson et al.
patent: 4576641 (1986-03-01), Bates et al.

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