Oxidation of uranium-. 75 weight percent titanium in environments containing oxygen and/or water vapor at 140/sup 0/C
The alloy reacts with water vapor to form uranium dioxide and hydrogen with the reaction kinetics proportional to the water vapor pressure to the 1/2.1 power. U-0.75 Ti reacts with oxygen to form uranium dioxide. The reaction rate is linear and independent of the oxygen pressure between 0.5 and 1000 Torr and it was approximately 3.2 x 10/sup -3/mg/cm/sup 2/.h. In a mixed environment of oxygen and water vapor, the alloy reacts preferentially with the oxygen and water vapor, the alloy reacts preferentially with the oxygen at a linear rate of approximately 3.3 x 10/sup -3/mg/cm/sup 2/.h until the oxygen is depleted. After the oxygen is consumed, the reaction and kinetics change to those of the alloy/water reaction. The alloy behaves similarly to unalloyed uranium in all three environments, except that an initial region of water vapor/uranium reaction was observed for unalloyed uranium in the mixed environment which was not seen in the alloy studies. The alloy exhibits the same reaction rate pressure dependencies as unalloyed uranium; however, its reaction rates are one to two orders of magnitude slower than those of the unalloyed material. Because of its improved oxidation resistance, it may not be necessary to plate U-0.75Ti cor corrosion protection for use under specific environmental conditions.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5106280
- Report Number(s):
- SAND-85-1688; ON: DE86002093
- Country of Publication:
- United States
- Language:
- English
Similar Records
CHEMICAL ENGINEERING DIVISION SUMMARY REPORT FOR APRIL, MAY, JUNE 1960
PROGRESS RELATING TO CIVILIAN APPLICATIONS DURING FEBRUARY 1960
Related Subjects
OXYGEN
CHEMICAL REACTIONS
URANIUM BASE ALLOYS
OXIDATION
WATER VAPOR
AGING
CHEMICAL REACTION KINETICS
HIGH TEMPERATURE
TITANIUM ADDITIONS
ACTINIDE ALLOYS
ALLOYS
ELEMENTS
FLUIDS
GASES
KINETICS
NONMETALS
REACTION KINETICS
TITANIUM ALLOYS
URANIUM ALLOYS
VAPORS
360105* - Metals & Alloys- Corrosion & Erosion