Characteristics of corrosion scales on steels in a CO sub 2 -saturated NaCl brine

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3585227· OSTI ID:7048596

Palacios, C A; Shadley, J R ^[1]

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1. Tulsa Univ., OK (United States)

Carbon dioxide corrosion problems in oil and gas production equipment are common. In recent years, the presence of carbon dioxide in produced fluids is encountered more frequently due to the use of enhanced oil recovery techniques involving CO{sub 2} injection into the reservoir and also due to the occurrence of CO{sub 2} gas production form deeper wells. This paper reports that a consequence of corrosion of steel in the presence of oxygen-free carbon dioxide and a water phase is the formation of an iron carbonate (FeCO{sub 3}) corrosion scale. This scale provides some protection of the steel from further corrosion. The protectiveness of the scale depends on environmental factors and characteristics of the steel. Information presented here describes structural characteristics of iron carbonate scales and discusses how structure may affect the corrosion mechanism. Examinations of iron carbonate scales revealed two kinds of scales and variations in scale thickness depending on the steel microstructure.

• OSTI ID: 7048596
• Journal Information: Corrosion (Houston); (United States), Journal Name: Corrosion (Houston); (United States) Vol. 47:2; ISSN 0010-9312; ISSN CORRA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300 -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
BRINES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CORROSION
CORROSIVE EFFECTS
CRYSTAL STRUCTURE
DIMENSIONS
DRILLING FLUIDS
ENHANCED RECOVERY
ENVIRONMENTAL EFFECTS
EQUIPMENT
FLUIDS
IRON ALLOYS
IRON BASE ALLOYS
IRON CARBONATES
IRON COMPOUNDS
MICROSTRUCTURE
NATURAL GAS WELLS
OIL WELLS
OXIDES
OXYGEN COMPOUNDS
STEELS
THICKNESS
TRANSITION ELEMENT COMPOUNDS
VARIATIONS
WELLS