Revealing anti-corrosion behavior of Mg alloy concrete formwork coated with release agents in Cl−-containing Portland cement paste

Wang, Ye; Xiao, Wenxin; Ma, Kai; Dai, Chaoneng; Wang, Danqian; Wang, Jingfeng

doi:10.1016/j.conbuildmat.2023.133413

Cited by 6 publications

(1 citation statement)

References 44 publications

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“…Extensive on-site experience and empirical evidence from experimental simulations consistently demonstrate the effectiveness of this model in elucidating the properties and structure of the passive film. Moreover, it provides a comprehensive understanding of both general and localized corrosion damage resulting from the presence of the passive film [29][30][31][32][33]. A dynamic equilibrium exists between the formation of the passive film at the metal substrate/film interface and its dissolution at the film/solution interface.…”

Section: Electrochemical Behavior Of Chloride Ions In Depassivationmentioning

confidence: 99%

Electrochemical Investigation of Chloride Ion-Induced Breakdown of Passive Film on P110 Casing Steel Surface in Simulated Pore Solution: Behavior and Critical Value Determination

Peng,

Lin,

Xia

et al. 2024

Metals

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In the petroleum industry, the casing steel is fixed with a cement sheath to ensure reliable service in demanding conditions characterized by high temperature, high pressure, and exposure to multiple types of media. After the hydration of the cement, a porous material is produced with a highly alkaline solution filling the pores, commonly referred to as the pore solution. The casing will form a protective passive film when in contact with a highly alkaline pore solution. Nevertheless, once the cement sheath cracks, chloride ions in the stratum will pass through the cement sheath to the surface of the casing. When chloride ions accumulate to a certain concentration, the passive film will be destroyed, without exerting a protective influence on the substrate. After chloride ions come into direct contact with the casing, the casing is prone to severe failure due to corrosion perforation. The casing failure can cause a blowout outside the casing and even scrapping of the oil well. Controlling casing corrosion and ensuring casing integrity relies on understanding the critical chloride ion concentration that can cause the degradation of the passive film. Therefore, to assess the electrochemical properties and analyze the damage process of the passive film under varying chloride ion concentrations, several characterization techniques were employed. These included potential–time curves (E-t), polarization curves, electrochemical impedance spectroscopy (EIS), and Mott–Schottky curves. In addition, the composition of the passive film on the surface of the P110 casing steel was qualitatively analyzed using X-ray photoelectron spectroscopy (XPS). To further understand the surface morphology of the P110 casing steel, scanning electron microscopy (SEM) was used.

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Section: Electrochemical Behavior Of Chloride Ions In Depassivationmentioning

confidence: 99%

Electrochemical Investigation of Chloride Ion-Induced Breakdown of Passive Film on P110 Casing Steel Surface in Simulated Pore Solution: Behavior and Critical Value Determination

Peng,

Lin,

Xia

et al. 2024

Metals

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Development of the CaCO3-coated passive film on Mg alloy densified by glucose/sodium gluconate via the assistance of ultrasound with a regrowth feature in Portland cement

Wang,

Pan

2024

Composites Part B: Engineering

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Enhanced corrosion resistance of Mg alloy embedded in Cl--containing Portland cement with the formation of CaCO3-coated Mg(Al)O passive film via one-step pulse electrodeposition

Wang,

Xiao,

Dai

et al. 2024

Corrosion Science

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Revealing anti-corrosion behavior of Mg alloy concrete formwork coated with release agents in Cl−-containing Portland cement paste

Cited by 6 publications

References 44 publications

Electrochemical Investigation of Chloride Ion-Induced Breakdown of Passive Film on P110 Casing Steel Surface in Simulated Pore Solution: Behavior and Critical Value Determination

Electrochemical Investigation of Chloride Ion-Induced Breakdown of Passive Film on P110 Casing Steel Surface in Simulated Pore Solution: Behavior and Critical Value Determination

Development of the CaCO3-coated passive film on Mg alloy densified by glucose/sodium gluconate via the assistance of ultrasound with a regrowth feature in Portland cement

Enhanced corrosion resistance of Mg alloy embedded in Cl--containing Portland cement with the formation of CaCO3-coated Mg(Al)O passive film via one-step pulse electrodeposition

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