Effect of surfactants on inhibitor performance in CO{sub 2} corrosion of steel under highly turbulent flow conditions

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:70041

Schmitt, G; Labus, B N ^[1]

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1. Iserlohn Polytechnic (Germany). Lab. for Corrosion Protection

To increase the knowledge on synergistic and antagonistic interactions between inhibitors (fatty amines, imidazolines, carboxamide ethoxylates) and surfactants (nonionics, quats) systematic investigations were performed under sweet gas production conditions (NaCl/CaCl{sub 2}-brine, 0.5 MPa CO{sub 2}, 80 to 130 C, ``rotating cage``: 4 m/s) with low alloy steel samples exhibiting three different microstructures (J 55, C 75, C 90) and finely ground or atmospherically rusted surface. It was proved for highly turbulent conditions that surfactants can affect the performance of CO{sub 2} corrosion inhibitors significantly, depending on the class of inhibitors, the class of surfactants, the microstructure of the steel and the temperature. Nonionics inhibit quenched-and-tempered steel, but stimulate corrosion of J 55. They impair the efficiency of amine inhibitors. Amine/quat combinations show synergistic effects. The inhibitor/surfactants interaction was investigated by different surface analysis techniques (XPS, LAMMA, TOF-SIMS).

• OSTI ID: 70041
• Report Number(s): CONF-940222--
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
36 MATERIALS SCIENCE
CARBON DIOXIDE
CATALYTIC EFFECTS
CHEMICAL COMPOSITION
CORROSION INHIBITORS
CORROSION PROTECTION
CORROSIVE EFFECTS
EXPERIMENTAL DATA
FLOW RATE
ION MICROPROBE ANALYSIS
LOW ALLOY STEELS
MICROANALYSIS
NATURAL GAS WELLS
PERFORMANCE
PH VALUE
PHOTOELECTRON SPECTROSCOPY
SURFACE PROPERTIES
SURFACTANTS
TEMPERATURE DEPENDENCE
TIME-OF-FLIGHT MASS SPECTROMETERS
X-RAY SPECTROSCOPY