The Effect of Microstructure on the Corrosion Resistance of Pipe Steel 20 under Conditions of Carbon Dioxide Corrosion

被引：2

作者：

Laurinavichyute, V. K. ^{[1
]}

Shibaeva, T., V ^{[2
]}

Pugolovkin, L., V ^{[1
]}

Zheleznyi, M., V ^{[2
]}

Pyshmintsev, I. Yu ^{[3
]}

Mal'tseva, A. N. ^{[3
]}

Chepik, F. D. ^{[3
]}

机构：

[1] Moscow MV Lomonosov State Univ, Fac Chem, Moscow, Russia

[2] Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow, Russia

[3] Russian Res Inst Tube & Pipe Ind, Chelyabinsk, Russia

来源：

RUSSIAN JOURNAL OF ELECTROCHEMISTRY | 2022年 / 58卷 / 03期

关键词：

pipeline steel; carbon dioxide corrosion; chloride ions; microstructure; thermal treatment; CO2; CORROSION; MILD-STEEL; MECHANISTIC MODEL; AQUEOUS-SOLUTIONS; CHLORIDE CONTENT; BEHAVIOR; FILMS; OIL; ELECTROCHEMISTRY; SYSTEMS;

D O I：

10.1134/S1023193522010098

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Thecorrosion stability of pipeline steel 20 in the as received state (r) and also after quenching (q), tempering (t), and normalization (n) is studied in acetate buffers saturated with CO2 and containing 0-0.85 M NaCl. The polarization measurements and open-circuit tests showed that the corrosion resistance decreases in the following series: t similar to n > q > r. The lower corrosion rates for t and n samples are associated with the lower content of pearlite and its uniform distribution throughout the microstructure. It is shown that the preferential dissolution of ferrite during corrosion is accompanied by the pearlite component exposure and the increase in cathodic currents, which favors acceleration of corrosion.

引用

页码：226 / 234

页数：9

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