Effect of microstructure and Cr content in steel on CO{sub 2} corrosion

Book · Thu Aug 01 04:00:00 EDT 1996

OSTI ID:268165

Ueda, Masakatsu ^[1]; Ikeda, Akio ^[2]

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1. Sumitomo Metal Industries, Ltd., Amagasaki (Japan). Iron and Steel Research Labs.
2. Sumitomo Metal Industries, Ltd., Osaka (Japan)

The effect of microstructure and Cr content in steels on CO{sub 2} corrosion was investigated by using steels containing Cr content from 0 to 13 mass% melted in laboratory and Steels J55, N80 and L80(API Grade) melted in the mill. Temperatures and H{sub 2}S contamination were considered as environmental factors. In CO{sub 2} environments, the temperature giving a maximum corrosion rate, T{sub max.}, existed in carbon and Cr steels. T{sub max.} increased together with Cr content, and T{sub max.} of 0, 1, 2 and 13% Cr steels was about 80, 100, 120 and 225 C, respectively. Because of this behavior, the relationship between Cr content and corrosion rate was linear at 60 C, but the corrosion rate was highest on the steel with around 1 mass% Cr at 100 C. H{sub 2}S contamination for CO{sub 2} corrosion suppressed the corrosion rate and localized-corrosion in the temperature region whose corrosion rate showed a maximum value. It was clarified that this was related to the formation of Fe-sulfides from EPMA analysis and the solubility of the corrosion products. Concerning microstructure, Steel J55 with ferritic-pearlitic microstructure showed good corrosion resistance for localized-corrosion compared with Steel N80 and L80 with martensitic microstructure.

• OSTI ID: 268165
• Report Number(s): CONF-960389--
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
36 MATERIALS SCIENCE
CARBON DIOXIDE
CARBON STEELS
CHEMICAL COMPOSITION
CHROMIUM
CHROMIUM STEELS
CORROSION
CORROSIVE EFFECTS
EXPERIMENTAL DATA
FIELD PRODUCTION EQUIPMENT
HYDROGEN SULFIDES
IRON SULFIDES
METALLURGICAL EFFECTS
MICROSTRUCTURE
SCANNING ELECTRON MICROSCOPY
TEMPERATURE DEPENDENCE