Preparation of pH-sensitive core-shell organic corrosion inhibitor and its release behavior in simulated concrete pore solutions

Zhu, Yangyang; Ma, Yuwei; Yu, Qijun; Wei, Jiangxiong; Hu, Jie

doi:10.1016/j.matdes.2017.01.063

Cited by 32 publications

(12 citation statements)

References 35 publications

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“…Reinforced concrete structures are sometimes affected by many processes leading to the loss of serviceability, or in extreme cases, to structural collapse. Reinforcement corrosion, sulfate attack, alkali-aggregate reaction, and freeze-thaw damage are some of the commonly occurring concrete durability problems 1 – 4 . However, corrosion of reinforcing steel is considered to be the major cause of concrete deterioration 1 , 5 – 7 .…”

Section: Introductionmentioning

confidence: 99%

Efficiency of generic and proprietary inhibitors in mitigating Corrosion of Carbon Steel in Chloride-Sulfate Environments

Al-Sodani

Maslehuddin

Al‐Amoudi

et al. 2018

Sci Rep

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The efficiency of generic and proprietary corrosion inhibitors (based on nitrite, amine carboxylate or amino alcohol) in corrosion mitigation of carbon steel, which is exposed to concrete solutions with different amounts of chloride as well as sulfate, was studied. The corrosion protection provided by the selected corrosion inhibitors was investigated by performing a potentiodynamic polarization study. In addition, the surface morphological properties of carbon steel samples exposed to the electrolyte mixed with or without inhibitors was also evaluated by scanning electron microscopy. The potentiodynamic polarization measurements showed that the evaluated inhibitors decreased the corrosion current density by 1.6 to 6.7 times depending on the type of inhibitor and the level of sulfate concentration in the electrolyte. The performance of inhibitors based on nitrite was better than that of inhibitors based on amine carboxylate or amino alcohol. The possible mechanisms of the inhibition in the chloride plus sulfate environments are also elucidated.

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Section: Introductionmentioning

confidence: 99%

Efficiency of generic and proprietary inhibitors in mitigating Corrosion of Carbon Steel in Chloride-Sulfate Environments

Al-Sodani

Maslehuddin

Al‐Amoudi

et al. 2018

Sci Rep

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“…Amphiphilic polyethylene oxide (PEO 113 )-b-polystyrene (PS 1171 ) copolymer was used to prepare microcapsule-based corrosion inhibitor (MCI) by dialysis in this study; the details related to the preparation procedure, copolymers and MCI can be found in [ 19 , 20 ]. The concentration of benzotriazole (BTA) encapsulated in MCI was 2.10 mg/mg and the concentration of MCI solution was 0.5 g/L the average diameter of MCI was about 250 nm [ 19 , 20 ].…”

Section: Methodsmentioning

confidence: 99%

“…Before the above tests, the collected mortar powders were immersed in ethanol for 48 h to stop hydration. In our previous study [ 19 ], after PEO-b-PS copolymers were synthesized, the products were purified by precipitating in methanol for three times before the preparation of MCI. As a result, it was believed that PEO-b-PS copolymers and MCI should be very stable in ethanol and the immersion in ethanol should not exhibit obvious effect on MCI in this present study.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous studies [ 19 , 20 ], tailored microcapsule-based corrosion inhibitors (MCI) with no significantly harmful impact on cement-based materials was successfully prepared. Very high pH sensitivity was relevant for the prepared MCI: on one hand, the prepared MCI presented a high stability in SPS with pH of 13; on the other hand, 5 times higher amount of the released benzotriazole (BTA) was observed in SPS with pH lower than 11.…”

Section: Introductionmentioning

confidence: 99%

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pH-Triggered Release Performance of Microcapsule-Based Inhibitor and Its Inhibition Effect on the Reinforcement Embedded in Mortar

Huang

Zhu

et al. 2021

Materials

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The smart release of healing agents is a key factor determining the inhibition efficiency of microcapsules-based corrosion inhibitors for reinforced concrete. In this study, the release behavior of benzotriazole (BTA) in microcapsule-based inhibitors was investigated in mortar sample to clarify the influence of different hydration products on the release process. The results indicated that under high pH environment (pH > 12.4), only about 5% reserved BTA was released from the mortar sample. pH drop resulted in the increased release of BTA from mortar sample. Most BTA in the microcapsule-based inhibitors was released from mortar sample in low pH environment, which was closely related to morphology/composition alterations of hydration products caused by pH drop of the environment. The smart release of BTA dramatically delayed corrosion initiation of reinforced mortar and halted corrosion product accumulation on the steel surface. Therefore, the corrosion resistance of the reinforced mortar was improved after corrosion initiation.

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“…Feng and Cheng produced nanoparticles loaded with benzotriazole (BTA) for manufacture of intelligent coatings intended to protect steel pipelines from chloride solutions. Zhu et al encapsulated BTA in poly(ethylene oxide)‐b‐polystyrene (PEO‐b‐PS) copolymers used to prepare core‐shell organic corrosion inhibitors and to mitigate the corrosion of reinforced concrete. Karekar et al also encapsulated BTA in zinc molybdate nanoparticles through the layer‐by‐layer assembly technique for preparation of smart coatings intended to protect mild steel.…”

Section: Introductionmentioning

confidence: 99%

Production of Polymer Particles Loaded with Corrosion Inhibitor for Applications in Oil Wells

Miranda

Nele

Pinto

2019

Macro Reaction Engineering

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During petroleum exploration, the use of corrosion inhibitors is necessary to reduce equipment maintenance costs, to guarantee the operation safety, and to make process operation more robust. For this reason, the present manuscript investigates the production of polymer particles loaded with a commercial corrosion inhibitor intended for controlled release applications in oil wells. The process comprises two steps: the first step regards the water‐in‐oil (W/O) heterogeneous styrene polymerization, while the second step involves the water‐in‐oil‐in‐water (W/O/W) styrene polymerization, prepared through dispersion of the W/O emulsion obtained in the first step in an aqueous medium. The results reveal that the morphologies of the produced particles are significantly affected by the analyzed process operation variables, such as reaction time, temperature, and feed ratios. Particularly, the duration of the first reaction step strongly influences the obtained particle size distributions and the encapsulation efficiencies. Finally, it is shown that the encapsulated inhibitor is released slowly in aqueous saline media.

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Preparation of pH-sensitive core-shell organic corrosion inhibitor and its release behavior in simulated concrete pore solutions

Cited by 32 publications

References 35 publications

Efficiency of generic and proprietary inhibitors in mitigating Corrosion of Carbon Steel in Chloride-Sulfate Environments

Efficiency of generic and proprietary inhibitors in mitigating Corrosion of Carbon Steel in Chloride-Sulfate Environments

pH-Triggered Release Performance of Microcapsule-Based Inhibitor and Its Inhibition Effect on the Reinforcement Embedded in Mortar

Production of Polymer Particles Loaded with Corrosion Inhibitor for Applications in Oil Wells

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