Electrochemical corrosion behavior of X52 and X60 steels in carbon dioxide containing saltwater solution

Abstract

X52 and X60 high strength low alloy (HSLA) steels are widely used in the construction of petroleum pipelines. This paper discusses the corrosion resistance of X52 and X60 steels in CO 2 containing saltwater at pH 4.4 and 50 °C. A circulating flow loop system inside an autoclave was used for conducting the experimental work. The rotating impeller speed was 2000 rpm. The corrosion rate was monitored using in situ electrochemical methods such as potentiodynamic sweep, linear polarization resistance, and electrochemical impedance spectroscopy (EIS) methods. Results indicated that the corrosion rate of X60 steel is relatively higher than that of X52 steel.

Corrosion behavior and characterization of plasma nitrided and borided AISI M2 steel

“…It is used for increasing wear resistance, fatigue strength, surface hardness and corrosion resistance of industrial components for a wide variety of applications [1][2][3] . Nitriding of steel results in formation of a compound layer and nitrogen diffusion zone beneath the compound layer.…”

Modeling of the corrosion process in steel oil pipelines in order to improve environmental safety

“…Numerical studies on the behavior of steel at electrochemical corrosion are described in papers [3,[18][19][20][21], but the research did not take into account the impact of local corrosion damage and operating conditions. Thus, even after numerous studies, the need to develop new dependences for assessing the corrosion processes that would take into account local environmental impacts, as well as special features in the operation of oil pipelines, remains largely unresolved.…”

“…According to (3), (4), the spread of potential and current density in the section of the examined pipeline that is determined by values of a, c, L and difference between stationary (current-less) potentials. This allows us to evaluate the features of electric field near the electrodes depending on the above-enumerated parameters and draw a conclusion about their impact on the distribution of potential and current.…”

“…Prolonged interaction between pipe metal and the environment leads to the intensification of corrosion processes, to the degradation of physical-mechanical properties in the material of a pipe wall [3]. The pipelines designed and manufactured in accordance with the regulations must be resistant to the action of the environment.…”

A Novel Emulsion Flow Loop for Investigating the Corrosion of X65 Steel in Emulsions with H2S/CO2

“…H 2 S is the main cause of hydrogen embrittlement and the formation of iron sulfide is accompanied by the generation of hydrogen gas, which ingresses into the metal and causes early failure due to embrittlement ( Ref 5,8,9). The corrosion behavior of carbon steel in the presence of CO 2 (Ref [10][11][12] and H 2 S ( Ref 12,13) has been illustrated in more detail in published studies. CO 2 found in sweet wells forms a weak carbonic acid (H 2 CO 3 ) solution in aqueous media.…”