High temperature-resistant corrosion protection coating on a com

Details High temperature-resistant corrosion protection coating on a com High temperature-resistant corrosion protection coating on a com

1993-06-25

1995-03-28

Green, Anthony

Compositions: coating or plastic

Coating or plastic compositions

Corrosion inhibiting coating composition

106 121, 106 127, 106 128, 420435, 420441, 428457, C09D 508, B32B 1504, C22C 1907

Patent

active

054013070

ABSTRACT:
A protective coating resistant to corrosion at medium and high temperatures is applied on a nickel-based or cobalt-based superalloy component. The protective coating essentially consists of the following elements (in percent by weight): 25 to 40% nickel, 28 to 32% chromium, 7 to 9% aluminum, 1 to 2% silicon, 0.3 to 1% of at least one reactive element of the rare earths, at least 5% cobalt; and impurities, as well as selectively from 0 to 15% of at least one of the elements of the group consisting of rhenium, platinum, palladium, zirconium, manganese, tungsten, titanium, molybdenum, niobium, iron, hafnium, and tantalum. The total share of the elements of the group is from 0 to a maximum of 15% and a remainder of at least 5% cobalt. The component and the coating applied thereon have a ductile brittle transition temperature below 500.degree. C.

REFERENCES:
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patent: 4093476 (1978-06-01), Boesch
patent: 4346137 (1982-08-01), Hecht
patent: 4451299 (1984-05-01), Smeggil et al.
patent: 4764225 (1988-08-01), Shanhat et al.
"The Durability and Performance of Coatings in Gas Turbine and Diesel Engines", Materials Science & Engineering, 88, 1987, pp. 321-323 no month.
"Some Effects of Structure and Composition on the Properties of . . . " Boone, J. Vac. Sci. Technol, vol. 11, No. 4, Jul./Aug. 1974, pp. 641-646.

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