Nanostructural and electrochemical characteristics of cerium oxide thin films deposited on AA5083-H321 aluminum alloy substrates by dip immersion and sol–gel methods

Hasannejad, H.; Aliofkhazraei, M.; Shanaghi, Ali; Shahrabi, T.; Sabour, A.

doi:10.1016/j.tsf.2009.03.046

Cited by 33 publications

(25 citation statements)

References 12 publications

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“…The influence of cerium-based conversion coating is more pronounced in the cathodic polarization plots compared to that of the anodic polarization plots in Figure 2. Such behavior is evidence of cerium deposition as an oxide/hydroxide on cathodic sites, which prevents the cathodic reaction [36]. Apparently, the anodic reactions are balanced by cathodic reactions on the metal surface.…”

Section: Potentiodynamic Polarization Measurementsmentioning

confidence: 99%

Corrosion behavior of Ce-oxide/hydroxide coated AA7075-T6 prepared by dip immersion method

Danaee

Kanaani²,

Maddahy³

et al. 2014

Turkish J Eng Env Sci

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Abstract:In this study, cerium-based conversion coating was deposited on aluminum 7075-T6 by dip immersion method.Cerium oxide/hydroxide is an environmentally friendly conversion coating. Its corrosion resistance in 3.5 wt.% NaCl solution was investigated by means of electrochemical impedance spectroscopy, potentiodynamic polarization, and surface techniques. The coated samples showed a significant decrease in corrosion rate and the coating resistance increased with increasing immersion time up to 1200 s. In addition, electrochemical impedance data showed that in the presence of cerium oxide/hydroxide conversion coatings, the charge transfer resistance of aluminum increased. Surface morphology and its chemical composition were analyzed by means of scanning electron microscopy and energy dispersive spectroscopy.

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Section: Potentiodynamic Polarization Measurementsmentioning

confidence: 99%

Corrosion behavior of Ce-oxide/hydroxide coated AA7075-T6 prepared by dip immersion method

Danaee

Kanaani²,

Maddahy³

et al. 2014

Turkish J Eng Env Sci

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“…129,130 Rare earths, particularly cerium, are often included in non-chromate sol-gel formulations. 117 They can be used or included as a structural component 117,[131][132][133][134][135][136][137] or as a separate non-bonded component that is present specifi cally to inhibit corrosion. 119,121,[126][127][128][138][139][140][141][142][143][144] This is because incorporation into the structure 117 limits the mobility of the rare earth and hence its ability to provide active corrosion protection, 145 although ceria nanoparticles have been found to provide good protection.…”

Section: Sol-gel Coating Processesmentioning

confidence: 99%

Coatings for corrosion prevention based on rare earths

Hughes

Harvey

Birbilis

et al. 2014

Rare Earth-Based Corrosion Inhibitors

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“…10,11 Currently, one of the most promising alternatives is cerium based sol-gel technology. [12][13][14][15][16][17][18][19][20] Compared to traditional conversion films, sol-gel derived coatings offer lots of advantages. For instance, it can be formulated to provide good corrosion resistance and favorable compatibility with organic top coats while being environment friendly.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Corrosion Behaviour of Cerium Based Sol-gel Composite Coatings on AA2024-T4 Aluminum Alloy

Peng

Chang

et al. 2016

Electrochemistry

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A serial of composite coatings produced by combination of cerium sol-gel coatings and cerium conversion layers has been developed in this work: (1) sol-gel coating sealed by conversion coating; (2) sol-gel coating sealed by lowdensity sol; (3) conversion coating thickened by sol-gel coating. For both sol-gel coatings and conversion coatings, cerium chloride heptahydrate (CeCl 3 ·7H 2 O) was used as cerium source. In order to evaluate the anti-corrosion properties of these composite coatings, Electrochemical Impedance Spectroscopy (EIS) and salt spray test (SST) were employed as the assessing method. Furthermore, the surface morphology of these composite coatings was characterized by SEM observation. The EIS and SST results thus obtained showed that the anti-corrosion properties of the composite coating (1) had been remarkably improved compared to the any single layer of sol-gel coating or conversion coating. Furthermore, the SEM observation revealed that the morphology of that composite coating was uniform and homogeneous, which may explicate the superior corrosion-resistant performance obtained by the composite coating (1). By contrast, other composite coatings including composite coating (2) and (3) were not as good as composite coating (1) in corrosion resistance, which could be attributed to cracks and heterogeneous microstructure existing on the surface of these composite coatings.

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Nanostructural and electrochemical characteristics of cerium oxide thin films deposited on AA5083-H321 aluminum alloy substrates by dip immersion and sol–gel methods

Cited by 33 publications

References 12 publications

Corrosion behavior of Ce-oxide/hydroxide coated AA7075-T6 prepared by dip immersion method

Corrosion behavior of Ce-oxide/hydroxide coated AA7075-T6 prepared by dip immersion method

Coatings for corrosion prevention based on rare earths

Preparation and Corrosion Behaviour of Cerium Based Sol-gel Composite Coatings on AA2024-T4 Aluminum Alloy

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