Release rate kinetics of corrosion inhibitor loaded halloysite nanotube-based anticorrosion coatings on magnesium alloy AZ91D

Adsul, Swapnil H.; Bagale, Uday; Sonawane, Shirish H.; Subasri, R.

doi:10.1016/j.jma.2020.06.010

Cited by 44 publications

(13 citation statements)

References 32 publications

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“…The corresponding polarization curve parameters are shown in Table . It has been reported that the thermodynamic properties of materials will affect the corrosion potential ( E corr ), so the E corr will not be used here to measure the corrosion resistance of the coating. − The lower corrosion density ( i corr ) coatings have better corrosion resistance. , The i corr of the Si-MgAlY LDH coating (2.08 ± 0.49) × 10 –9 A/cm 2 is much lower than the MAO coating (4.65 ± 0.05) × 10 –5 , MgAl LDH coating (3.09 ± 0.27) × 10 –6 A/cm 2 , MgAlY LDH coating (2.45 ± 0.34) × 10 –7 A/cm 2 , and Si-MgAl LDH coating (1.46 ± 0.16) × 10 –8 A/cm 2 . From the SEM images (Figure F), the MgAlY LDH coating presents tiny and dense elongated flakes, compared to the MgAl LDH coating.…”

Section: Resultsmentioning

confidence: 99%

“…50−52 The lower corrosion density (i corr ) coatings have better corrosion resistance. 53,54 The i corr of the Si-MgAlY LDH coating (2.08 ± 0.49) × 10 GO flakes, which compensated for the surface defects of GO and formed a high-performance composite. Furthermore, covering the surface of the MgAlY LDH coating with the composite material by electrophoresis can better compensate for the pores of the coating.…”

Section: Corrosion Resistance 321 Electrochemical Measurementsmentioning

confidence: 99%

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Corrosion Resistance of the GO/ZIF-8 Hybrid Loading Benzotriazole as a Multifunctional Composite Filler-Modified MgAlY Layered Double Hydroxide Coating

Chen

Dai

et al. 2022

Langmuir

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A composite coating with good load-carrying and controlled release capabilities for the corrosion inhibitor benzotriazole (BTA) was prepared while providing active and passive corrosion protection for magnesium alloy systems. In this paper, the organic corrosion inhibitor BTA was loaded into the ZIF-8/GO hybrid (GZB), and then, the GZB composite was coated with hexadecyltrimethoxysilane (HDTMS). Then, the GZB composites carried by HDTMS were made to adhere a ternary MgAlY layered double hydroxide (LDH) coating based on microarc oxidation (MAO) coating by electrophoresis (Si-MgAlY LDH coating). The successful loading of BTA by GZB composites was verified by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Meanwhile, the Si-MgAlY LDH coating was characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The potentiodynamic polarization curves show that the corrosion current density of the Si-MgAlY LDH coating reaches (2.08 ± 0.49) × 10–9 A/cm2, which means that the Si-MgAlY LDH coating greatly improves the corrosion resistance of magnesium alloy AZ31. The Si-MgAlY LDH coating can also achieve self-healing function in harsh environments, which is attributed to the synergistic effect of passive and active protection. The composite coating is of great significance to expand the potential applications of magnesium alloys.

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Section: Resultsmentioning

confidence: 99%

Section: Corrosion Resistance 321 Electrochemical Measurementsmentioning

confidence: 99%

Corrosion Resistance of the GO/ZIF-8 Hybrid Loading Benzotriazole as a Multifunctional Composite Filler-Modified MgAlY Layered Double Hydroxide Coating

Chen

Dai

et al. 2022

Langmuir

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“…The inefficacy of the barrier properties of sol–gel coatings due to the incompatibility of the sol–gel matrix with the incorporated inhibitors can be overcome by loading nano/micro containers with good compatibility with the sol–gel coating, and then incorporating them into the coating [ 206 , 207 , 208 , 209 , 210 , 211 , 212 ]. Thus, the detrimental interaction of the inhibitors with the sol–gel is minimized.…”

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

et al. 2022

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Owing to the unique active corrosion protection characteristic of hexavalent chromium-based systems, they have been projected to be highly effective solutions against the corrosion of many engineering metals. However, hexavalent chromium, rendered a highly toxic and carcinogenic substance, is being phased out of industrial applications. Thus, over the past few years, extensive and concerted efforts have been made to develop environmentally friendly alternative technologies with comparable or better corrosion protection performance to that of hexavalent chromium-based technologies. The introduction of corrosion inhibitors to a coating system on magnesium surface is a cost-effective approach not only for improving the overall corrosion protection performance, but also for imparting active inhibition during the service life of the magnesium part. Therefore, in an attempt to resemble the unique active corrosion protection characteristic of the hexavalent chromium-based systems, the incorporation of inhibitors to barrier coatings on magnesium alloys has been extensively investigated. In Part III of the Review, several types of corrosion inhibitors for magnesium and its alloys are reviewed. A discussion of the state-of-the-art inhibitor systems, such as iron-binding inhibitors and inhibitor mixtures, is presented, and perspective directions of research are outlined, including in silico or computational screening of corrosion inhibitors. Finally, the combination of corrosion inhibitors with other corrosion protection strategies is reviewed. Several reported highly protective coatings with active inhibition capabilities stemming from the on-demand activation of incorporated inhibitors can be considered a promising replacement for hexavalent chromium-based technologies, as long as their deployment is adequately addressed.

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“…Traditional inhibitive pigments such as chromate and red lead have gradually become limited in use due to their harmful effects on the environment and human health. − Nanocontainers of organic corrosion inhibitors are promising alternatives for protective coating applications. ,, Recently, scientists have developed many types of nanocontainers using mesoporous silica, layered double hydroxides, and nanotubes. ,, Among them, the natural, cheap, nontoxic, and environmentally friendly halloysite nanotubes (HNTs) have attracted much attention. − Shchukin et al studied the effect of HNTs loaded with 2-mercaptobenzothiazole (MBT) in sol–gel coatings, confirming that the nanocontainers presented an active inhibition effect on the corrosion of aluminum alloy . Xu et al investigated the influences of benzotriazole (BTA)-loaded HNTs on active corrosion protection of polybenzoxazine coatings on mild steel.…”

Section: Introductionmentioning

confidence: 99%

Insights into Effects of Metal Cations on the Adsorption of Benzotriazole on Halloysite Nanotubes: An Experimental and DFT Study

Pham

Nguyen²,

Le³

et al. 2022

J. Phys. Chem. C

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Natural halloysite nanotubes (HNTs) have attracted great interest as smart nanocontainers of corrosion inhibitors. The adsorption behavior of corrosion inhibitors on HNTs will affect their loading capacity, a crucial property of smart nanocontainers. This work modified the surface of HNTs by preadsorbing metal cations (M2+: Fe2+, Zn2+, or Cu2+) to improve the adsorption of benzotriazole (BTA) on HNTs. The results based on the thermal gravimetric analysis showed that the loading capacities of BTA in Fe2+-, Zn2+-, and Cu2+-adsorbed HNTs were 8.25, 8.39, and 9.74 wt %, respectively, which are significantly higher than those in pristine HNTs of 4.57 wt %. Furthermore, density functional theory calculations exhibited that the adsorption energies of BTA on the M2+-adsorbed surfaces increased compared to that on the clean surface. Notably, the increasing trend of adsorption energies is in good agreement with that of measured loading capacities. Moreover, the presence of metal cations significantly enhances the charge transfer between BTA and the surface. The density of states analysis indicated that the adsorbed metal cations shifted the valence bands of the surface close to the Fermi level, thereby enhancing the coupling between the occupied bands of HNTs and the unoccupied orbitals of BTA.

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Release rate kinetics of corrosion inhibitor loaded halloysite nanotube-based anticorrosion coatings on magnesium alloy AZ91D

Cited by 44 publications

References 32 publications

Corrosion Resistance of the GO/ZIF-8 Hybrid Loading Benzotriazole as a Multifunctional Composite Filler-Modified MgAlY Layered Double Hydroxide Coating

Corrosion Resistance of the GO/ZIF-8 Hybrid Loading Benzotriazole as a Multifunctional Composite Filler-Modified MgAlY Layered Double Hydroxide Coating

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

Insights into Effects of Metal Cations on the Adsorption of Benzotriazole on Halloysite Nanotubes: An Experimental and DFT Study

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