Study of the Mass Transport on Corrosion of Low Carbon Steel Immersed in Sour Solution Under Turbulent Flow Conditions

Galván-Martínez, Ricardo; Orozco-Cruz, Ricardo; Mendoza-Flores, J.; Contreras, A.; Genescá, J.

doi:10.5772/23065

Cited by 3 publications

(5 citation statements)

References 30 publications

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“…On the other hand, in the anodic branches, it is possible to observe that the slopes are lower than the cathodic branches and it has values that correspond to an activational or a charge transfer process. To get a better corrosion study of the API X100 steel, the PC electrochemical parameters were obtained, which one is possible to observe in the of the electrochemical parameters shown that the anodic slopes (ba) have an average value of 0.144 V/current´s decade, indicating that it is a mix process, where the anodic reaction is controlled by a charge transfer process, but this reaction is also influenced by a mass transfer process (18). The electrochemical parameters β and icorr are the Stern and Geary constant and the corrosion current density, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, in the cathodic slopes (bc), the average value is 0.376 V/current´s decade. This value corresponds to a process controlled by mass transfer, it is, the cathodic reaction of corrosion of the API X100 steel is controlled by the oxygen transfer from the bulk to the metallic surface (18). It is important to point out that the behavior of the steel corrosion process at turbulent flow conditions, is attributed to that at this flow conditions and high Re number, the structure of the turbulent boundary layer favors the convection and diffusion of the electroactive species from the bulk to the metallic surface.…”

Section: Resultsmentioning

confidence: 99%

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Corrosion Mechanism of a X100 Pipeline Steel in NACE Brine at 1000 rpm

Campechano-Lira

Bedolla²,

Contreras

et al. 2021

ECS Trans.

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This work shows the research about the corrosion mechanism analysis of a X100 pipeline steel immersed in NACE brine under turbulent flow conditions (1000 and 5000 rpm) at room temperature and atmospheric pressure of Veracruz Port. In order to study the hydrodynamic conditions, a rotating cylinder electrode (RCE) was used, while to the electrochemical analysis, the electrochemical techniques like potentiodynamic Polarization Curves (PC) and Linear Polarization Resistance (RPL) were used. The obtained results shown that the corrosion system is limited by the mass transfer process, specifically the oxygen transfer from the bulk to the metallic surface, due to the momentum transfer, called “Convective Diffusion.” It is important to point out that this diffusion can modify the electrochemical reactions (incrementing of redox reactions), so the stability of the corrosion products films adsorbed on metallic surface are dependent to the shear stress and the aggressiveness of the medium.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Corrosion Mechanism of a X100 Pipeline Steel in NACE Brine at 1000 rpm

Campechano-Lira

Bedolla²,

Contreras

et al. 2021

ECS Trans.

View full text Add to dashboard Cite

show abstract

“…Therefore, this behavior corroborates that the corrosion system is under the influence of O 2 diffusion from the bulk to the metallic surface. (19) That is to say, the mass transfer process limited the corrosion process of the steel immersed in NACE brine with and without corrosion inhibitor under turbulent flow conditions.…”

Section: [1]mentioning

confidence: 99%

“…It is important to point out that the cathodic current density (i cat ) was determined experimentally from the cathodic polarization curves showed in figure 2 at a defined potential (19), where it was compared with the theoretical current density of the O 2 (i lim, O2 ) obtained from the Eisenberg equation, such as it is shown in Figure 3. In this figure is possible to observe that the i cat of the steel without inhibitor increases with respect to the peripheral speed of the cylinder, however, it only happens up to ±1.2 m/s equivalent to 2000 rpm and remains constant up to ±1.5 m/s with a value of approximately 3.0 E -04 A/cm 2 .…”

Section: [1]mentioning

confidence: 99%

Cathodic Kinetics on High Resistance and Low Alloy Steels with Corrosion Inhibitors

et al. 2019

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This paper presents a study of the cathodic kinetics of high resistance and low carbon steel by the potentiodynamic cathodic polarization curves. In this study, the steel was immersed in a NACE brine with 50 ppm of corrosion inhibitor dissolved under turbulent flow conditions, room temperature and atmospheric pressure of the Veracruz Port. In order to simulate the hydrodynamic conditions, a Rotating Cylinder Electrode (RCE) with different rotation speeds was used. Electroactive species to be reduced were determined using the Eisenberg equation, as well as an analysis with dimensionless numbers was made in order to complement this study. The analysis of cathodic kinetics shown that the system under turbulent flow conditions is dominated by a mass transfer process, this is due to the diffusion of the oxygen from the bulk of the solution toward to metallic surface. According to the comparison of the experimental and the theoretical , attained by the Eisenberg equation, it can be established that the cathodic kinetics of the process is dominated by an oxygen reduction reaction.

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“…This technique is excellent for the study of corrosion processes because it brings real-world turbulent conditions into the laboratory [7]. This flow increases corrosive species mass transfer from the aggressive media to the metal surface [8,9]. One of the most common applications of the EN method is to identify localized corrosion like metal pitting [10,11].…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of a Rotating Hydrodynamic System for Electrochemical Noise Measurement.

et al. 2023

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Corrosion is a concern for the oil industry. According to the NACE, this phenomenon can cause problems that cost millions of dollars annually, putting people and the environment at risk. To combat this phenomenon, corrosion-reducing control practices must be implemented. It must be measured with sensitive tools and equipment. As a result, the current study proposes creating a laboratory prototype with the primary goal of simulating the dynamic operation of the rotating cylinder electrode (RCE). A rotating cylinder electrode (PRCE) laboratory prototype is constructed using an experimental methodology based on RCE physical-mechanical characterization, mathematical modeling of its actuators (brushless motors), and electronic instrumentation. This methodology enables the design and implementation of a control system to manipulate the rotation speed of the RCE stem in the evaluation of electrochemical noise, allowing for the rejection of external disturbances and the monitoring of references in a turbulent flow. The PRCE's control section's design, when compared to currently available equipment, allows for cost, acquisition, and maintenance savings (RCE). Following that, the correct design of the PRCE prototype will be validated.

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Study of the Mass Transport on Corrosion of Low Carbon Steel Immersed in Sour Solution Under Turbulent Flow Conditions

Cited by 3 publications

References 30 publications

Corrosion Mechanism of a X100 Pipeline Steel in NACE Brine at 1000 rpm

Corrosion Mechanism of a X100 Pipeline Steel in NACE Brine at 1000 rpm

Cathodic Kinetics on High Resistance and Low Alloy Steels with Corrosion Inhibitors

Design and Implementation of a Rotating Hydrodynamic System for Electrochemical Noise Measurement.

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