Effect of moisture contents of bentonitic clay on the corrosion behavior of steel pipelines

El-Shamy, A. M.; Shehata, M. F.; Ismail, A. I. M.

doi:10.1016/j.clay.2015.06.041

Cited by 50 publications

(16 citation statements)

References 11 publications

(19 reference statements)

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“…Taking carbon steel as an example, as the moisture content increases, the corrosion rate of Q235 carbon steel in simulated soil first increases and then decreases. When the moisture content reaches 20% to 45%, the corrosion rate is the highest [ 50 , 68 , 69 ]. The corrosion rate of grounding materials in soils with extremely high and low moisture content is relatively small.…”

Section: The Formation Mechanism and Influencing Factors Of Soil Corrosionmentioning

confidence: 99%

Research Advances of Soil Corrosion of Grounding Grids

Zhang

Liao²,

Xue

et al. 2021

Micromachines

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A grounding grid plays the role of discharging current and balancing voltage to ensure the safety of the power system. However, soil corrosion can damage the grounding grid, which then can endanger the safe operation of power system. This paper reviewed recent research advances of soil corrosion of grounding grid. The cause, mechanism, types, and influencing factors of soil corrosion of grounding grids were summarized, and the corresponding detection technology and protective measures were also introduced. The paper pointed out that soil corrosion is a serious threat to the grounding grid system. Moreover, the impact mechanism of AC stray current, new corrosion detection technology, and better protective measures still need in-depth research.

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Section: The Formation Mechanism and Influencing Factors Of Soil Corrosionmentioning

confidence: 99%

Research Advances of Soil Corrosion of Grounding Grids

Zhang

Liao²,

Xue

et al. 2021

Micromachines

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“…Li et al [9] found that Brevibacterium halotolerans promote the corrosion of X80 steel. There are many other factors on metallic corrosion in soils, such as soil resistivity [10], water content [11][12][13], size and grade of soil [14], soil type [15,16], soluble salt ions content [17] and pH [18]. Stray currents can also affect soil corrosion.…”

Section: Introductionmentioning

confidence: 99%

Galvanic Corrosion Behavior of Copper–Drawn Steel for Grounding Grids in the Acidic Red Soil Simulated Solution

Fan

Chen

Lin

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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The influence of pH and metallographic structure on the corrosion behavior of copper-drawn steel is studied with the simulated system. The effect of pH on the corrosion behavior of copper-drawn steel has been investigated using open-circuit potential, potentiodynamic polarization, galvanic current measurement, scanning electron microscopy and scanning vibrating electrode technique techniques. The steel is corroded as anode, while the corrosion of copper plate is protected as cathode. All the results revealed that pH and metallographic structure had a significant influence on the corrosion behavior of copper-drawn steel. With the decrease in pH value from 6 to 2.4, the corrosion rate of copper-drawn steel galvanic couple (Cu-Fe GC) obviously increased in the simulated solution of acidic red soil. The electric field formed by the Cu-Fe GC changes the direction of ion migration between the copper and drawn steel electrodes, which impacts the composition and microstructure of corrosion products formed on the electrode surface.

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“…Natural soil is a highly non-homogeneous environment, composed of different minerals and chemical compounds. Many soil parameters influence the corrosion of the steel [16] which are the particle size [17] [18], pH [19], moisture content [20] [21], concentration of dissolved oxygen [21] [22], nature of salt ions, and organic content [23]. According to the soil's particle size distribution, its resistivity varies and affects significantly the corrosion of the steel in soil [23].…”

Section: Introductionmentioning

confidence: 99%

“…Studies reported in the literature discuss mostly bentonite-iron interaction. El-Shamy et al [20] showed that the corrosion rate of pipelines in contact with bentonite is proportionally related to water content, as large as the moisture content is below 40%. Kaufhold et al [24] showed that Na-bentonites are slightly less corrosive than Ca-bentonites, and that highly charged smectites are less corrosive than low charged ones.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical studies of steel rebar corrosion in clay: Application to a raw earth concrete

et al. 2020

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Reinforcement feasibility of a new ecological earth concrete was examined. Steel rebar corrosion, when in contact with three different types of clayey soil, was investigated using electrochemical methods, potentiodynamic voltammetry and impedance spectroscopy (EIS).Results have shown that the voltammetry method overestimates the corrosion rate while EIS supplies the most reliable results. Corrosion rate decreased and a steady state was reached after four months of contact. The type of clay does not have a significant influence on the corrosion rate of the steel rebar, and the average value of 3 was considered acceptable for the lifetime of the structure.

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Effect of moisture contents of bentonitic clay on the corrosion behavior of steel pipelines

Cited by 50 publications

References 11 publications

Research Advances of Soil Corrosion of Grounding Grids

Research Advances of Soil Corrosion of Grounding Grids

Galvanic Corrosion Behavior of Copper–Drawn Steel for Grounding Grids in the Acidic Red Soil Simulated Solution

Electrochemical studies of steel rebar corrosion in clay: Application to a raw earth concrete

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