Novel and self-healing anticorrosion coatings using rare earth compounds

Yasakau, K.A.; Ferreira, M.G.S.; Zheludkevich, Mikhail L.; Terryn, Herman; Mol, J.M.C.; González-García, Yaiza

doi:10.1533/9780857093585.233

Cited by 9 publications

(5 citation statements)

References 115 publications

(123 reference statements)

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“…In general, the literature agrees that rare earths behave as cathodic corrosion inhibitors for many metal alloys when added to a corrosive electrolyte (de Damborenea et al, 2014;Hughes et al, 2014;O'Keefe et al, 2014;Yasakau et al, 2014). In particular, the process of inhibiting corrosion through the lanthanide salts for various materials is a consequence of the inhibition of cathodic regions by the precipitation of an oxide/ hydroxide film.…”

Section: Electrochemical Studiesmentioning

confidence: 91%

Assessment of Self-Healing Epoxy-Based Coatings Containing Microcapsules Applied on Hot Dipped Galvanized Steel

2019

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This study focuses on the design, development, and validation of two coating systems for corrosion protection of hot dip galvanized steel substrates. The coatings consist of epoxy-based resin reinforced with core-shell microcapsules, either cerium oxide or cuprous oxide core and a polymeric shell doped with cerium ions. The effect of the modification of the epoxy resin with a liquid rubber polymer has also been studied. Corrosion studies via electrochemical impedance spectroscopy (EIS) revealed that the coatings have enhanced barrier properties. Moreover, EIS studies on coatings with artificial scribes, demonstrated an autonomous response to damage and a selfhealing effect. Heat-induced material re-flow has also been observed after exposure to temperature higher than the T g of the system, which offered an additional self-healing mechanism, partially inhibiting the underlying corrosion processes when the liquid rubber is present in the system.

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Section: Electrochemical Studiesmentioning

confidence: 91%

Assessment of Self-Healing Epoxy-Based Coatings Containing Microcapsules Applied on Hot Dipped Galvanized Steel

2019

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“…Corrosion inhibitors are compounds capable of inhibiting or reducing the corrosion rate when present in small amounts. Among the corrosion inhibitors, salts of rare earth elements, specifically lanthanides, have been identified as an environmentally friendly method and have been previously reported [36][37][38][39][40][41][42]. Hinton (1984) [43] was the first who concluded that rare earth salts act as a cathodic inhibitor on an aluminum substrate, similar to that of Zn 2+ in steel.…”

Section: Introductionmentioning

confidence: 99%

“…Yasakau et al [42] published a review of rare earth salts as healing agents and defined self-healing materials as those that can repair themselves and recover functionality after degradation, damage, and failure. Coatings that are modified with cerium particles can acquire a self-healing capacity.…”

Section: Introductionmentioning

confidence: 99%

Cerium Compounds Coating as a Single Self-Healing Layer for Corrosion Inhibition on Aluminum 3003

et al. 2022

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The formation of cerium hydroxide was studied, and its capacity as a corrosion inhibitor on aluminum substrates was evaluated. These particles were deposited by immersing the substrate in a bath with cerium nitrate and hydrogen peroxide. Four different immersion times were used to determine the differences in behavior from low concentrations to an excess of particles on the surface. The coatings were analyzed morphologically by scanning electron microscope (SEM) and optical microscope, and chemically by energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Electrochemical corrosion analysis was studied using cyclic potentiodynamic polarization (CPP), electrochemical impedance spectroscopy (EIS), and electrochemical noise (EN). The results show that for 2 and 5 min of immersion, there was corrosion inhibition caused by the presence of cerium Ce3+ in the coating, but with excess cerium hydroxide particles, corrosion was favored. The presence of cerium particles favors corrosion at 30 s of immersion. This is the same case at 60 min, where corrosion was favored by the excess of Ce4+ particles on the surface.

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“…One way to enhance durability of a hydrogel is designing it with self-healing properties. Self-healing is the ability of the material to autonomously heal or repair itself 10 . By creating hydrogel composites with this ability, damaged composites can be reused to extend their life, and multiple composites can easily be joined to make a larger piece.…”

Section: Introductionmentioning

confidence: 99%

Self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites

Park

Kim

Choi

et al. 2020

Sci Rep

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With the growing risk of radiation exposure, there are growing interests in radiation shielding. Because most radiation shields are made from heavy metals, a need to develop a soft shield is raised to protect human body. However, because the shield can easily undergo a mechanical damage by an impact, it would be better to have self-repairing system in the shield. Here, we have fabricated an intrinsic self-healable soft shield for gamma ray by making acrylamide based hydrogel composite. The composite contains lead dioxide nanoparticles for gamma ray shielding and Laponite clays for self-repairing. Although the hydrogel contained a large amount of lead dioxide nanoparticles (3.23 M), the fabricated composites stretched beyond 1400% while showing a high attenuation coefficient of 0.1343 cm−1 against gamma ray from a cobalt-60 source. Then a systematic study was performed to analyze self-healing properties and the 96.55% of maximum self-healing efficiency was obtained. We also analyzed a storage modulus of hydrogel and molecular weight of polyacrylamide to study an effect of gamma ray on the self-healing. The self-healing efficiency was decreased by a gamma ray because the radiation induces scissioning or covalent crosslinking in the chains.

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Novel and self-healing anticorrosion coatings using rare earth compounds

Cited by 9 publications

References 115 publications

Assessment of Self-Healing Epoxy-Based Coatings Containing Microcapsules Applied on Hot Dipped Galvanized Steel

Assessment of Self-Healing Epoxy-Based Coatings Containing Microcapsules Applied on Hot Dipped Galvanized Steel

Cerium Compounds Coating as a Single Self-Healing Layer for Corrosion Inhibition on Aluminum 3003

Self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites

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