Corrosion resistant stainless steel

Details Corrosion resistant stainless steel Corrosion resistant stainless steel

1994-10-31

1996-03-05

Simmons, David A.

Metal treatment

Process of modifying or maintaining internal physical...

Producing or treating layered, bonded, welded, or...

148565, 148903, 148276, 148286, 148287, 427191, 427328, 427597, 428557, 428660, 428663, 428667, C21D 109

Patent

active

054964229

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: 4212900 (1980-07-01), Serlin
"Metals Handbook", 9th Edition; American Society for Metals: Metals Park, Ohio (1983); pp. 793-799.

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