Method for oxidising a thermocouple sheath
US8153187B2 · kind B2 · utility
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3References
4Claims
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Key dates
| Filing date | May 27, 2009 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | May 7, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K2205/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for forming an oxygen resistant aluminum oxide layer on an outer surface of a thermocouple sheath composed of a nickel alloy containing between 1% to 7% aluminum comprises removing a pre-formed oxide layer from the outer surface so as to create a prepared sheath; performing a controlled oxidation by subjecting the prepared sheath to atmospheric conditions at a temperature between 1000° C. and 1250° C. so as to form the oxygen resistant layer on the thermocouple sheath and to thus form an oxidized sheath; and cooling the oxidized sheath so as to prepare the oxidized sheath for service.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.