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Carbon Steel Pipe - DOAJ

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Last Updated: 11 January 2023

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Corrosion rate and corrosion behaviour analysis of carbon steel pipe at constant condensed fluid

This report examines carbon steel pipe's corrosion rate and corrosion behavior in the presence of constant condensed fluid from a geothermal power plant. During the immersion period where water quality parameters remain constant, corrosion rates in the solid component of the condensate fluids remain stable. On the other hand, the corrosion rate of low carbon steel pipe decreasings as a result of the longer exposure time in the condensate fluid. During immersion tests found in the corrosion investigation, the corrosion products were found to be uniform with iron oxide in the form of FeO and Fe2O3*H2O.

Source link: https://doi.org/10.30544/591


Quantitative Limit State Assessment of a 3-Inch Carbon Steel Pipe Tee in a Nuclear Power Plant Using a Damage Index

Large displacements in nuclear power plants is likely due to seismic waves, since the main mode of their piping systems is dominated by the low-frequency region. Therefore, the relative displacement caused by seismic movements must be considered when determining the seismic integrity of a piping system. In this study, in-plane cyclic loading tests were carried out under various constant amplitudes using test specimens made of SCH 40 3-inch pipes and a tee in a nuclear power plant's piping system. In addition, an attempt was made to quantify the failure criteria using a damage index based on the force's displacement and momentu2013deformation angle relationship. Using the damage index, it was discovered that the failure conditions of the SCH 40 3-inch carbon steel pipe tee can be effectively expressed.

Source link: https://doi.org/10.3390/en13236395


On the Deposition Process of Ceramic Layer Thin Films for Low-Carbon Steel Pipe Protection

In several applications, ceramic thin films with variable thicknesses have been used. Two ceramic materials with thin layers are suggested in order to shield the petroleum transportation pipes from the harmful H2S attack. Laser deposition of ceramic layers by in situ time-resolved optical techniques is investigated in this paper. The ceramic emissions' space-u2013time displacement of the ceramic emissions was investigated in order to determine the plasma structure and specific kinetic energies, according to the authors. During the deposition process, the ablation crater also shows selective ablation. The EDX findings reveal that Al/Si is retained in the thin films similar to the target composition.

Source link: https://doi.org/10.3390/ma15134673


Evaluation of the Limit State of a Six-Inch Carbon Steel Pipe Elbow in Base-Isolated Nuclear Power Plants

Base isolation systems in nuclear power plants can help reduce earthquake resistance from seismic loads. The installation of base isolation systems in nuclear power plants can increase the plant's security. However, nuclear power plants with base isolation systems face greater displacement as they handle seismic loads. Based on the test findings, the SCH40 6-inch carbon steel pipe elbow's leakage line and low-cycle fatigue curves were presented. The average values of the 6-inch pipe elbow calculated using forceu2212displacement and momentu2212relative deformation angle relationships were 10. 91 and 11. 27, respectively, respectively.

Source link: https://doi.org/10.3390/en14248400


UTILIZATION OF WASTEWATER FOR CORROSION PREVENTION OF CARBON STEEL PIPE USING SINGLE CHAMBER MICROBIAL FUEL CELLS

This research uses the term Microbial Fuel Cells to describe a process in a biological cathodic protection system. The biological CP utilizes the microbial characteristics of living microorganisms that are able to produce electrons and satisfy the need for CP in a corrosion prevention system. The electrons produced by the bacteria will disperse and migrate to the graphite's surface area, which is used as an anode. MFCs for CP's goal is to achieve an optimum value of electro potential produced by bacteria inoculated in MFCs system as preventive steps against corrosion occurred in commonly used carbon steel pipelines. Wastewater, including POME and estuary water, is stored in a freezer at the temperature below 4oC. When substrate is mixed, the 4 liter of wastewater is placed in a rig and 40g of sodium acetate is added, so it would serve as a medium for bacteria propagation in a single chamber MFC. The electro potential reading is measured on an hourly basis using an electrical multi meter for each source of wastewater and correspondent current density and power density can be determined. According to the study, goat feces wastewater contains the lowest rate of corrosion, which is 1. 18 x 10-6 kg/h, followed by estuary water and palm oil mill effluent of 4 x 10-6 kg/h and 7. 18 x 10-6 kg/h respectively, which is 0. 18 x 10-6 kg/h. The wastewater from goats' feces also had the highest mean negative potential of -578. 07 mV, although standard cathodic protection is 850 mV.

Source link: https://doaj.org/article/2d117e5aee67480a9d4fcf94cf44e797


The Effect of Time and Corrosion Products Formation on Corrosion Rate of Carbon Steel Pipe Under Turbulent Flow Conditions

In a diluted 0. 1N NaCl solution under turbulent flow conditions, the effect of time on corrosion rates of carbon steel pipe is investigated. The effect of corrosion products manufacturing on the friction coefficient is investigated and discussed. The corrosion process is investigated as a mass transfer process, and the mass transfer theory is used to represent the corrosion rate. For low Reynolds number and temperature, it is found that the onset of corrosion decreases with time, but that it raises the corrosion rate at high Reynolds number and temperature.

Source link: https://doaj.org/article/a52b7915c722405a9e3b10c20c66d20f


Effects of Corrosion on Mechanical Properties of Welded Carbon Steel Pipe in District Heating Water

This report investigated the effects of corrosion on the mechanical characteristics of welded carbon steel pipe in district heating water. The total charge was determined as a result of the potentiodynamic experiments, welded carbon steel pipe showed uniform corrosion and the potentiodynamic charges were determined. Mechanical properties were degraded as a result of corrosion, according to corrosion damage, according to the tensile tests. Mechanical properties were influenced by the corrosion of the welded carbon steel pipe, which caused mechanical degradation by the microstructure analysis and estimation of stress intensity factors. With increasing aging time, the fractured was switched from ductile to brittle fractures.

Source link: https://doi.org/10.3390/ma12223682


Localized Corrosion Occurrence in Low-Carbon Steel Pipe Caused by Microstructural Inhomogeneity

In this report, the reason for the failure of a low-carbon steel pipe meeting KS D 3562 in a district heating system was investigated. Pitting corrosion occurred more outside the pipe than inside, where water quality is monitored. Cementite in the pearlite's large pearlite fraction region acted as a cathode to promote dissolution of surrounding ferrite. Localized corrosion occurred in the pipe's soilwater environment, not to aluminum inclusions, and localized corrosion was accelerated by a significant amount of pearlite around the aluminum inclusions, resulting in pipe failure.

Source link: https://doi.org/10.3390/ma15051870

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions