Synthesis and Evaluation of Self-Healing Cerium-Doped Silane Hybrid Coatings on Steel Surfaces

Zand, Roohangiz Zandi; Verbeken, Kim; Adriaens, Annemie

doi:10.1016/b978-0-12-411467-8.00005-2

Cited by 3 publications

(3 citation statements)

References 34 publications

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“…All results indicated an improvement of the corrosion resistance by using the hybrid SG film with an increase in the charge transfer and the pore resistances. Other authors obtained similar conclusions with inorganic or hybrid SG films, combined or not with corrosion inhibitors, on zinc [12][13][14], electrodeposited zinc [15], or galvanized steel [11,[16][17][18][19][20][21][22][23][24][25]. Regarding zinc alloys, Dos Santos [26] studied the influence of bis [3-(triethoxysilyl)propyl] tetrasulfide (BTESPTS) or 1,2-bis(triethoxysilyl) ethane (BTSE) + BTESPTS SG films combined with Ce or La conversion layers, on the corrosion resistance of electrodeposited Zn-Fe (2 wt.%).…”

Section: Introductionsupporting

confidence: 53%

Improvement of the corrosion resistance of electrodeposited Zn-Fe by sol-gel conversion films

Arrighi

Paint

Savall

et al. 2022

J. Electrochem. Sci. Eng.

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An aqueous hybrid inorganic/organic sol-gel solution composed of tetraethylorthosilicate (TEOS), methyltriethoxysilane (MTES) and (3-glycidyloxypropyl)trimethoxysilane (GPTMS) was applied on ZnFe (14 wt.% Fe) electrodeposited on steel as a sacrificial layer. Two precursor contents were studied: 10 (SG10) and 30 % (SG30). First, the morphology and thickness of the films were assessed by Scanning Electron Microscopy (SEM) observations. They revealed the presence of micro-cracks in the films without alkaline surface preparation due to the pyramidal shape of the ZnFe deposit. Then, the corrosion resistance of the systems was determined by Electrochemical Impedance Spectroscopy (EIS) and Neutral Salt Spray (NSS) test. All results indicated an improvement in the corrosion resistance thanks to the presence of the SG films. However, the protection provided by the SG10 film did not permit to durably protect the ZnFe deposit. The combination of surface preparation and a SG30 film provided promising protection to the ZnFe deposit with an increase of the low-frequency modulus and a delay in corrosion product appearance during the NSS test.

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Section: Introductionsupporting

confidence: 53%

Improvement of the corrosion resistance of electrodeposited Zn-Fe by sol-gel conversion films

Arrighi

Paint

Savall

et al. 2022

J. Electrochem. Sci. Eng.

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“…Moreover, cerium was also proven to exhibit a self‐healing ability. Recent studies have reported on the improved characteristics of protective hybrid organic–inorganic coatings upon addition of different amounts of cerium‐nitrate , ceria nanoparticles, unmodified , or activated with cerium‐nitrate , Ce/Mo or Ce/Zn/Mo nanocontainers also activated with cerium‐nitrate , as fillers, for corrosion mitigation purposes. Combinations of polyaniline (PANI) and ceria and addition of ceria nanoparticles in epoxy coatings were also reported.…”

Section: Introductionmentioning

confidence: 99%

Corrosion stability of cerium-doped cataphoretic epoxy coatings on AA6060 alloy

Jegdić

Živković

Popić

et al. 2016

Materials and Corrosion

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In this study, corrosion protection efficiency of undoped epoxy and epoxy coating doped with cerium on aluminum alloy AA6060 is evaluated over prolonged exposure to 3 wt% NaCl solution by electrochemical impedance spectroscopy (EIS). Different amounts of Ce(NO3)3 are added into the epoxy suspension used for the cataphoretic deposition. Suspension stability is characterized by zeta potential and particle size values. Water content and thermal stability of the coatings were determined by thermogravimetric analysis. Insufficient corrosion stability, very close to that of undoped epoxy, is revealed for the coating with 1 mM Ce. Higher cerium doping contributes to a significant increase in corrosion stability (2–3 orders of magnitude greater charge‐transfer resistance). Epoxy coating doped with 5 mM Ce displays a pronounced self‐healing ability and the best corrosion protection and adhesion, owing to evenly distributed cerium precipitates on the aluminum surface. In the case of 10 mM Ce‐doped coating, the formation of Ce clusters and higher porosity causes a certain lowering of the protective ability. EIS measurements on epoxy coating with artificial defect confirm these findings.

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“…Various surface techniques have been developed to avoid or alleviate corrosion, such as temperature reduction, removal of oxygen or oxidizing materials and changing the concentration of the working environment. There are also anodic and cathodic protection methods that can be applied to improve corrosion resistance [1].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Oxidation Resistance of Mild Steel by SiO₂-Al₂O₃Sol Gel Coating

Kirtay

2015

Acta Phys. Pol. A

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SiO2-Al2O3 sol gel coating solution was used for coating of mild steel substrate by dip coating technique with withdrawing speeds of 250, 500, 750 and 1000 mm/min. The coatings were subsequently heat treated at 200• C for 1 hour in order to improve their corrosion resistance properties. The coating sol was synthesised using Glycidoxypropyltrimethoxysilane (C9H20O5Si) and Aluminium triisopropylate (C9H21O3Al). The corrosion resistance of the both coated and uncoated samples was evaluated by the Tafel polarization in NaCl solution. Fourier transformed infrared (FTIR) and energy dispersive spectroscopy (EDS) analyses were used to identify the presence of various functional groups in the coating solution. A comparison of the corrosion resistance of the coated and uncoated mild steel is presented. Variation of corrosion potential (Ecorr) has increased and corrosion current density (icorr) has decreased in the coated samples. icorr values of coated specimens, heat treated at 200• C, were 12 to 14 times smaller than those of uncoated specimen. The measured electrochemical parameters indicate that the corrosion resistance was improved by the coating.

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Synthesis and Evaluation of Self-Healing Cerium-Doped Silane Hybrid Coatings on Steel Surfaces

Cited by 3 publications

References 34 publications

Improvement of the corrosion resistance of electrodeposited Zn-Fe by sol-gel conversion films

Improvement of the corrosion resistance of electrodeposited Zn-Fe by sol-gel conversion films

Corrosion stability of cerium-doped cataphoretic epoxy coatings on AA6060 alloy

Improvement of Oxidation Resistance of Mild Steel by SiO₂-Al₂O₃Sol Gel Coating

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Synthesis and Evaluation of Self-Healing Cerium-Doped Silane Hybrid Coatings on Steel Surfaces

Cited by 3 publications

References 34 publications

Improvement of the corrosion resistance of electrodeposited Zn-Fe by sol-gel conversion films

Improvement of the corrosion resistance of electrodeposited Zn-Fe by sol-gel conversion films

Corrosion stability of cerium-doped cataphoretic epoxy coatings on AA6060 alloy

Improvement of Oxidation Resistance of Mild Steel by SiO2-Al2O3Sol Gel Coating

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Improvement of Oxidation Resistance of Mild Steel by SiO₂-Al₂O₃Sol Gel Coating