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CORROSION OF ALLOY STEELS IN CARBON DIOXIDE

Journal Article · · J. Australian Inst. Metals
OSTI ID:4816154
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The corrosion of 1% Cr, 1/2% Mo and 2 1/4% Cr, 1% Mo steels in carbon dioxide was measured within the temperature range 450 to 500 deg C and the pressure range 0 to 15 atmospheres. The effects of gas velocity, surface preparation, and water content of the gas were also determined. Some results of a 12% Cr, 1% Ni steel are included within the temperature range 600 to 725 deg C. Under semi-static conditions both low alloy steels formed adherent oxide scales of the Fe/sub 3/O/sub 4/-- Fe/sub 2/O/sub 3/ type together with an uniden tified spinel. The weight gains obtained were dependent on temperature and varied little with gas pressure, water content of gas, or surface treatment of the metal. A cubic relationship was found to best fit the weight gain-time results, and weight gains varied from 1.7 mg/cm/sup 2/ to a maximum of 5.2 mg/cm/sup 2/ after 1000 hours exposure wlthin the temperature range investigated. The 12% steel had a weight gain range of 0.05 to 0.47 mg/cm/sup 2/ after 1000 hours at the higher temperatures. Some scaling occurred in high velocity gas, the intent being much greater for the 1% Cr, 1/2% Mo steel. Weight gains varied from 0.7 mg/cm/sup 2/ at 450 deg C to 2.5 mg/ cm/sup 2/ a 525 deg C after 100 hours at a velocity of 100 ft/sec. It was observed that the relative thickness of the Fe/sub 2/O/sub 3/ scale was much greater under flowing gas than under semi-static conditions. (auth)
Research Organization:
Australian Atomic Energy Commission Research Establishment, Lucas Heights, New South Wales
NSA Number:
NSA-16-020986
OSTI ID:
4816154
Journal Information:
J. Australian Inst. Metals, Journal Name: J. Australian Inst. Metals Vol. Vol: 7
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

CARBON DIOXIDE
CHROMIUM ALLOYS
CLEANING
CORROSION
EFFICIENCY
FILMS
IRON OXIDES
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
PRESSURE
STEELS
SURFACES
TEMPERATURE
VELOCITY
WEIGHT