AIR OXIDATION OF TWO REFRACTORY ALLOYS (NICRAL D AND HASTELLOY X) AT 900 AND 1100 C

Journal Article · Thu Oct 01 04:00:00 EDT 1959 · J. Nuclear Materials

DOI:https://doi.org/10.1016/0022-3115(59)90017-0· OSTI ID:4204944

Sannier, J; Dominget, R; Darras, R

The oxidation in air of two refractory alloys (Nicral D and Hastelloy X) was studied at 900 and 1100 deg C, by means of recording thermobalances and microscopic cross section examination. At 900 deg C, the surface oxidation rates of the two alloys are quite similar, but at 1100 deg C the alloy Nicral D oxidizes faster than the alloy Hastelloy X. On the other hand, after heating at 1100 deg C for 150 hours, Nicr10 shows both intergranular oxidation and a small amount of internal oxidation, whereas Hastelloy X is especially subject to internal oxidation. In addition, two descaling methods were compared: and electrolytic method, in a sodium hydroxide-sodium carbonate bath, and a chemical method using a sodium nitrate-sodium peroxide bath; the latter appears suitable only for Hastelloy X. (auth)

• Research Organization: Centre d'Etudes Nucleaires, Saclay, France
• NSA Number: NSA-14-004566
• OSTI ID: 4204944
• Journal Information: J. Nuclear Materials, Journal Name: J. Nuclear Materials Vol. Vol: 1
• Country of Publication: Country unknown/Code not available
• Language: French

Related Subjects

AIR
CHEMICALS
CHROMIUM ALLOYS
CLEANING
ELECTROLYSIS
EXPANSION
GRAIN BOUNDARIES
HASTELLOY
HEATING
HIGH TEMPERATURE
METALS, CERAMICS, AND MATERIALS
MICROSCOPY
MOLYBDENUM ALLOYS
NICKEL ALLOYS
OSMIUM OXIDES
OXIDATION
PHASE DIAGRAMS
RECORDING SYSTEMS
REFRACTORIES
SODIUM CARBONATES
SODIUM HYDROXIDES
SODIUM NITRATES
SURFACES
THERMAL ANALYSIS
THERMOGRAVIMETRY
TRACE AMOUNTS
WEIGHT