Volatile inhibitors for CO{sub 2} corrosion

Conference · Thu Dec 31 04:00:00 EST 1998

OSTI ID:350162

Andreev, N N; Kuznetsov, Y I ^[1]

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1. Russian Academy of Sciences, Moscow (Russian Federation). Inst. of Physical Chemistry

Unlike liquid-phase inhibitors, volatile corrosion inhibitors (VCI) can adsorb on the surface from the vapor phase and spontaneously penetrate into crevices and slots, as well as reach surfaces of complex-shaped articles that are difficult to coat. The VCI vapors saturate thereby the humidity condensed e.g. on internal pipeline surfaces, to form a necessary protective film. The main advantage of a VCI lies in the possibility to protect all of the inside surfaces that are in contact with both the liquid and vapor medium. The advantages of these inhibitors are very important for the protection of long-distance pipelines and equipment which have complex shapes including slits, cavities and small clearances. However, many unsolved problems still remain concerning the optimal use of VCI. The role of volatility, solubility, basicity, and other features of VCI in their efficiency against the CO{sub 2} corrosion of steel are discussed. Some examples of a quantitative approach to the prediction of optimal chemical structure of VCI are demonstrated.

• OSTI ID: 350162
• Report Number(s): CONF-980316--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
36 MATERIALS SCIENCE
CARBON DIOXIDE
CORROSION INHIBITORS
CORROSION PROTECTION
CORROSIVE EFFECTS
EQUIPMENT
NATURAL GAS INDUSTRY
PETROLEUM INDUSTRY
PIPELINES
STEELS
VOLATILE MATTER