Far-infrared emitter of high emissivity and corrosion resistance

Details Far-infrared emitter of high emissivity and corrosion resistance Far-infrared emitter of high emissivity and corrosion resistance

1993-04-08

1994-08-16

Turner, A. A.

Stock material or miscellaneous articles

Composite

Of metal

219552, 420 37, 420 43, 420 50, 420442, 428469, 4284721, 4284722, C22C 3822

Patent

active

053386167

ABSTRACT:
A far-infrared emitter of high corrosion resistance is prepared by an oxidizing heat treatment of a body made from a stainless steel of 20-35% by weight of chromium, 0.5-5.0% by weight of molybdenum, up to 3.0% by weight of manganese and up to 3.0% by weight of silicon at 900.degree.-1200.degree. C. to form an oxidized surface film having a thickness of at least 0.2 mg/cm.sup.2. Further, a far-infrared emitter of a high emissivity approximating a black body is prepared by subjecting a body made from a stainless steel of 10-35% by weight of chromium, 1.0-4.0% by weight of silicon and up to 3.0% by weight of manganese to a blasting treatment to roughen the surface followed by an oxidizing heat treatment at 900.degree.-1200.degree. C. to form an oxide film on the surface in the form of protrusions having a length of at least 5 .mu.m.

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patent: 4742324 (1988-05-01), Shida et al.
patent: 4802894 (1989-02-01), Usami et al.
patent: 4822689 (1989-04-01), Fukubayashi et al.

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