Double-doped zeolites for corrosion protection of aluminium alloys

Ferrer, Emmanuel L.; Rollon, Analiza P.; Mendoza, Herman D.; Lafont, Ugo; Garcia, Santiago J.

doi:10.1016/j.micromeso.2014.01.004

Cited by 72 publications

(25 citation statements)

References 21 publications

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“…These include anion-exchange hydrotalcite loaded with decavanadate [10], organic corrosion inhibitors encapsulated in -cyclodextrins [11], or SiO2 nanoparticles and halloysite nanotubes loaded with azole derivatives, covered by polyelectrolyte multilayers [8,12]. More recently, other carriers for corrosion inhibitors in multifunctional coatings were suggested: TiO2 nanocontainers loaded with 8-hydroxyquinoline [13], montmorillonite modified with quaternary ammonium salt [14], NaY zeolites loaded with two different inhibitors (cerium and diethyldithiocarbamate) [15] and pH-sensitive polymeric particles loaded with 8-hydroxyquinoline [16]. There are several reviews available describing the latest advances on nano and microcapsules for application in corrosion protective coatings [17,18], showing the diversity of reservoirs and the respective triggers and mechanisms of action.…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection of AA2024 by sol–gel coatings modified with MBT-loaded polyurea microcapsules

Maia

Yasakau

Carneiro

et al. 2016

Chemical Engineering Journal

110

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In this work we report the synthesis of polyurea microcapsules loaded with corrosion inhibitor 2-mercaptobenzothiazole (MBT) for corrosion protection of 2024 aluminum alloy. The microcapsules were prepared by interfacial polycondensation. The resulting capsules exhibit spherical shape, with diameter ranging between 100 nm and 2 µm. The loading content of MBT was found to be 5 wt% and release studies showed that MBT is preferentially released under acidic and alkaline conditions and follows the Fickian diffusion model. This pH dependency seems suitable for protection of metallic alloys where corrosion processes are accompanied by local pH changes. Furthermore, the microcapsules were added to a hybrid sol-gel coating and its performance assessed by electrochemical and accelerated standard tests. The results obtained indicate that capsules loaded with MBT do not affect negatively the barrier properties of sol-gel coatings, and contribute for the enhancement of adhesion of coatings to the metallic substrate. More relevant, these additives impart active corrosion protection suppressing corrosion activity at defect sites, which opens prospects for application of polyurea microcapsules as additives for high-performance coatings.

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Section: Introductionmentioning

confidence: 99%

Corrosion protection of AA2024 by sol–gel coatings modified with MBT-loaded polyurea microcapsules

Maia

Yasakau

Carneiro

et al. 2016

Chemical Engineering Journal

110

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“…It is possible that, during this time, the adhesion of the deposited layer of Ce oxide/hydroxide is weakened . Also, due to a larger Pilling–Bedworth ratio, the cracking of thicker layers of CeO 2 could have occurred . This led to a decrease in the R p value and to an increase in the corrosion rate.…”

Section: Resultsmentioning

confidence: 99%

Corrosion behaviour of AA2024 aluminium alloy in different tempers in NaCl solution and with the CeCl₃ corrosion inhibitor

Jegdić

Bobić

Linić

2019

Materials & Corrosion

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The paper analyses the corrosion behaviour of naturally and artificially aged AA2024 alloy in NaCl solution and in the presence of an environment‐friendly corrosion inhibitor, CeCl3. On the basis of the values of polarisation resistance and corrosion current density, the corrosion resistance of the protective inhibitor film is established as well as the general corrosion resistance of this aluminium alloy. Resistance to pit formation is determined based on the difference in pitting and corrosion potentials while resistance to pit growth is determined based on the amount of charge consumed during pit growth. A scanning electron microscope is used to examine the morphology of the pits formed during the pitting corrosion testing, as well as to determine the cerium content on intermetallic particles and the matrix AA2024 alloy. The corrosion behaviour of AA2024 alloy is investigated after different test periods in NaCl solution and in the same solution with the CeCl3 inhibitor. The corrosion resistance of both tempers of AA2024 alloy is more than one order of magnitude higher in the presence of CeCl3. An explanation of the observed differences in the corrosion behaviour of the naturally and artificially aged AA2024 alloy is proposed. Different corrosion behaviour of the alloy after different test periods is also explained.

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“…Common natural minerals that have been used for ion exchange of inhibitors include alumino-silicates such as natural zeolites, clays, and double layer hydroxide such as hydrotalcites. For example, cage structures like zeolites, such as NaX and NaY zeolites, have been loaded with Ce(III) inhibitors [173][174][175]. Layered structures, such as clays, have also been loaded with a range of inhibitors including Ce [176] and Ca-exchanged bentonite clays [177], and been tested in paints.…”

Section: Inhibitor Delivery Systemsmentioning

confidence: 99%

Self-healing coatings

Hughés¹

2015

Recent Advances in Smart Self-Healing Polymers and Composites

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Double-doped zeolites for corrosion protection of aluminium alloys

Cited by 72 publications

References 21 publications

Corrosion protection of AA2024 by sol–gel coatings modified with MBT-loaded polyurea microcapsules

Corrosion protection of AA2024 by sol–gel coatings modified with MBT-loaded polyurea microcapsules

Corrosion behaviour of AA2024 aluminium alloy in different tempers in NaCl solution and with the CeCl₃ corrosion inhibitor

Self-healing coatings

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Double-doped zeolites for corrosion protection of aluminium alloys

Cited by 72 publications

References 21 publications

Corrosion protection of AA2024 by sol–gel coatings modified with MBT-loaded polyurea microcapsules

Corrosion protection of AA2024 by sol–gel coatings modified with MBT-loaded polyurea microcapsules

Corrosion behaviour of AA2024 aluminium alloy in different tempers in NaCl solution and with the CeCl3 corrosion inhibitor

Self-healing coatings

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Product

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Corrosion behaviour of AA2024 aluminium alloy in different tempers in NaCl solution and with the CeCl₃ corrosion inhibitor