A novel pH-responsive smart anticorrosion coating based on sepiolite and MOF for high-performance corrosion protection

Chen, Haidong; Yu, Zongxue; Yang, Guangcheng; Liao, Kexi; Peng, Bokai; Pang, Yutao; Zhu, Lijuan; Tang, Junlei

doi:10.1016/j.surfcoat.2022.128768

Cited by 18 publications

(5 citation statements)

References 40 publications

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“…The Rc and Rct of all coatings showed a decreasing trend during the 30−day immersion experiment. However, the impedance of the BTA−HAp−CD/EP coating retained the highest value after 30 days, i.e., one to three orders of magnitude higher than that of the other coatings, demonstrating the best corrosion resistance of all the coatings [4]. The water absorption rate of coating is often the most intuitive index to evaluate the performance of coating in practical application.…”

Section: Characterization Of the Composite Coatingsmentioning

confidence: 99%

“…In addition, the safety risks caused by metal corrosion also have to be considered. The current methods of metal protection include synthesis of corrosion−resistant alloys [1], use of corrosion−resistant coatings [2], addition of corrosion inhibitors [3][4][5], cathodic protection and anode passivation [6], etc. It is worth mentioning that epoxy resin anticorrosive coatings are favored in practical applications because of their high efficiency, economic efficiency, and simple operation [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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A High−Performance Anti−Corrosive Epoxy Coating Based on Ultra−Thin Hydroxyapatite Nanosheets with pH−Responsive Functions

Feng,

Zhu,

Chen

et al. 2023

Molecules

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The changes in the working environment have necessitated greater requirements in terms of the long−term anti−corrosion ability of metal anti−corrosion coatings, and the emergence of intelligent coatings has met this demand. A nanocontainer with a hydrophobic inner cavity and hydrophilic outer cavity called β−cyclodextrin (β−CD) was grafted onto the surface of hydroxyapatite (HAp) with a silane coupling agent, encapsulating benzotriazole (BTA) and embedded in epoxy resin to improve the coating anticorrosion performance. The excellent corrosion resistance of the coating in immersion and scratch experiments was derived from the inert protective layer formed by the reaction of the rapidly released corrosion inhibitor with the corrosion products on the metal surface. After 30 days of immersion experiment, the coating could still maintain the low−frequency impedance value of 6.28 × 107 Ω cm2. In this work, the enhancement of the physical barrier function of HAp nanoparticle and the pH−response function conferred by β−cyclodextrin provided the coating with good passive and active acting abilities in corrosive environments, respectively.

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Section: Characterization Of the Composite Coatingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A High−Performance Anti−Corrosive Epoxy Coating Based on Ultra−Thin Hydroxyapatite Nanosheets with pH−Responsive Functions

Feng,

Zhu,

Chen

et al. 2023

Molecules

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“…[11] MOFs can encapsulate inhibitors well and release them at the appropriate time in response to the stimuli. [12] Cu-BTC copper-based MOF, in which Cu(II) metal units are connected by benzene-1,3,5-tricarboxylate (BTC) linkers, can be used as corrosion inhibitor carrier. Cu-BTC has properties such as high chemical stability, redox activity, electro, and photochemical properties, and biocompatibility.…”

Section: Introductionmentioning

confidence: 99%

“…Metal–organic frameworks (MOFs) composed of metal ions connected by organic linkers are excellent candidate for this purpose due to their important loading capability, biocompatibility, and convenient synthesis under mild conditions [11] . MOFs can encapsulate inhibitors well and release them at the appropriate time in response to the stimuli [12] . Cu‐BTC copper‐based MOF, in which Cu(II) metal units are connected by benzene‐1,3,5‐tricarboxylate (BTC) linkers, can be used as corrosion inhibitor carrier.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a Curcumin@Cu‐BTC MOF Smart Anti‐Corrosion Coating for Copper

Dehghan‐Chenar,

Zare,

Mohammadpour

2023

ChemistrySelect

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The curcumin@Cu(II)‐benzene‐1,3,5‐tricarboxylate metal‐organic framework (Cur@Cu‐BTC MOF) coating, as a pH‐sensitive smart anti‐corrosion coating, has been synthesized by encapsulating Cur, as a green inhibitor, in Cu‐BTC MOF. The characteristics of the coating were investigated by scanning electron microscope (SEM) images, energy dispersive X‐ray spectroscopy (EDS), elemental scattering map, FTIR spectroscopy and X‐ray diffraction (XRD) patterns. Corrosion parameters of Cur@Cu‐BTC MOF smart coating in 3.5 % NaCl corrosive solution were investigated using potentiodynamic polarization (Tafel) plots and electrochemical impedance spectroscopy (EIS). Indeed, curcumin loading into Cu‐BTC MOF makes the coating more compact. The inhibition efficiency of Cur@Cu‐BTC MOF coating is 72.57 %. Also, when curcumin is loaded into Cu‐BTC MOF, its consumption is about 6 times lower than using it directly as an inhibitor. Also, the anti‐corrosion performance of the smart coating was measured in different immersion times in 3.5 % NaCl solution. Using UV‐vis spectrometry, it was found that the synthesized Cur@Cu‐BTC MOF nanocapsules have a loading capacity of 16.6 % for curcumin. Cur@Cu‐BTC MOF acts as a smart coating and responds to the decreasing of the local pH caused by the corrosion reaction. Encapsulated curcumin is released in response to the pH stimuli and acts as a corrosion inhibitor.

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“…In recent years, the excellent physical blocking performance of 2D layered materials in anticorrosive coatings has been widely used in epoxy resin coatings, such as graphene [1,2], oxide graphene [3,4], hydroxyapatite [5,6], boron nitride [7] and MXenes [8]. However, two-dimensional materials such as graphene and MXenes have difficulty in preparation and high costs, making them unsuitable for large-scale industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Performance Research of Natural Mica Modified with Zirconium-Based Metal–Organic Frameworks for an Epoxy Resin Anti-Corrosion Coating

Zhu,

Feng,

Peng

et al. 2023

Molecules

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A new composite material made from mica and a metal–organic framework (MOF) has been developed to improve the anticorrosive capabilities of epoxy resin coatings. The layered mica was loaded with denser and more uniform UIO-66 nanoparticles after modifying the composite with polyethyleneimine (PEI). The composites were used as fillers to prepare epoxy coatings that exhibited long-lasting active (labyrinth effect produced by mica) and passive (pH-sensitive release of corrosion inhibitors) corrosion protection. Settling experiments showed that polyethyleneimine improved the composites’ compatibility in epoxy resin. After being immersed in a 3.5 wt.% NaCl solution for 60 days, the adhesion of PMC–UIO@MBT/EP increases to 9.01 MPa, while the water absorption rate only reaches 2.57%. It indicates that the coating has good barrier properties and stability. After being soaked in a 3.5 wt.% NaCl solution for 60 days at pH = 7, PMC–UIO@MBT/EP exhibits high low-frequency impedance (8.30 × 108 Ω), as demonstrated by the electronic impedance spectrum (EIS). In addition, the coating also exhibited the highest low-frequency impedance after 30 days in 3.5 wt.% NaCl solution at pH = 11.

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A novel pH-responsive smart anticorrosion coating based on sepiolite and MOF for high-performance corrosion protection

Cited by 18 publications

References 40 publications

A High−Performance Anti−Corrosive Epoxy Coating Based on Ultra−Thin Hydroxyapatite Nanosheets with pH−Responsive Functions

A High−Performance Anti−Corrosive Epoxy Coating Based on Ultra−Thin Hydroxyapatite Nanosheets with pH−Responsive Functions

Fabrication of a Curcumin@Cu‐BTC MOF Smart Anti‐Corrosion Coating for Copper

Performance Research of Natural Mica Modified with Zirconium-Based Metal–Organic Frameworks for an Epoxy Resin Anti-Corrosion Coating

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