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THE EFFECT OF 0.5 PERCENT OXYGEN ON THE CORROSION RESISTANCE OF ZIRCALOY 2

Technical Report ·
OSTI ID:4303198
;
A fifteen-pound ingot of Zircaloy-2 with an oxygen content of amount 0.5% was made by double arc-melting of compressed electrodes into which were incorporated the alloying additions. From a section of the ingot corrosion specimens were prepnred, initially in two conditions: (1) cold worked 15% after hot working at 850 deg C and (2) annealed at 850 deg C after hot rolling at 850 deg C.'ine cold rolled specimens were tested both etched and unetched. The annealed specimens were separated into five groups. One group was tested in the annealed condition and each of the remaining groups was subjected to one of the following procedures: (1) heat treated in vacuum at 1000 deg C, 1 hr, water quench; (2) heat treated in vacuum at 1000 deg C, 1 hr, furnace cool; (3) hydrogen treated, 750 deg C, 1 hr, furnace cool; (4) hydrogen treated, 750 deg C, 24 hr, furnace cool. Samples were corrosion tested in triplicate in both water and steam according to standard practice established by the Zirconium Corrosion Committee. It was found that 0.5% oxygen has a definite lowering effect on the corrosion resistance of Zircaloy-2. Further it was found that the corrosion resistance with 0.5% oxygen was improved by hydrogen treatment and that the intensity or time of hydrogen treatment affected the extent of improvement. Specific effects of various heat treatments, cold work and etching were not conclusively shown. (auth)
Research Organization:
Bureau of Mines. Northwest Electrodevelopment Experiment Station, Albany, Oreg.
NSA Number:
NSA-12-015504
OSTI ID:
4303198
Report Number(s):
USBM-U-52
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

ANNEALING
COLD WORKING
COOLING
CORROSION
EFFICIENCY
ELECTRIC ARCS
ELECTRODES
FURNACES
HEAT TREATMENTS
HIGH TEMPERATURE
HYDROGEN
MATERIALS TESTING
MELTING
MINERALOGY, METALLURGY, AND CERAMICS
OXYGEN
PRESSURE
ROLLING
STABILITY
STEAM
VACUUM
WATER
ZIRCALOY