Corrosion resistance of zinc–resin hybrid coatings obtained by electro-codeposition

Mureșan, Alina Crina; Benea, Lidia; Ponthiaux, Pierre

doi:10.1016/j.arabjc.2016.07.002

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…However, when functionalised silica is incorporated to the sol-gel derived matrix, a further enhancement is observed, presenting this coating with the highest corrosion resistance values, as reported previously [54]. These results are in agreement with data found in the literature where samples with higher roughness led to less protective coatings [64,69].…”

Section: Electrochemical Behavioursupporting

confidence: 91%

Impact of silica nanoparticles on the morphology and mechanical properties of sol-gel derived coatings

Mora

Taylor

Paul

et al. 2018

Surface and Coatings Technology

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Although corrosion resistance and mechanical properties of sol-gel coatings have been studied independently, there are limited studies that consider both collectively. However, since any form of mechanical damage could impair the protective function of the coating, it is prudent to consider the mechanical durability of coatings as well as their corrosion resistance. The present work considers the impact of silica nanoparticles on the morphology and mechanical properties of a sol-gel derived coating. The relationships between the results obtained from tests such as atomic force microscopy (AFM), nanoindentation or erosion test with previously reported corrosion results obtained via salt spray or electrochemical impedance spectroscopy (EIS) are discussed. Results show that reinforcing a sol-gel coating with silica nanoparticles and, particularly, functionalised silica nanoparticles led to coatings with improved mechanical properties and enhanced erosion impact resistance. The role of nanoparticles on improving mechanical properties and corrosion resistance, which is of importance within the coating industry, is discussed. Highlights:-Effect of SiO2 on morphology and mechanical properties in a sol-gel coating was studied-SiO2 surface treatment improved mechanical durability and corrosion resistance-Importance of studying mechanical and corrosion resistance properties of coatings has been proved

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Section: Electrochemical Behavioursupporting

confidence: 91%

Impact of silica nanoparticles on the morphology and mechanical properties of sol-gel derived coatings

Mora

Taylor

Paul

et al. 2018

Surface and Coatings Technology

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“…As was disclosed before, R p values corresponding to nanocomposite A36-S/ER/BFRGO are higher compared to R p values of the A36-S and A36-S/ER, indicating that the functionalization–reduction process offers higher corrosion protection in 1 M NaCl (58.4 g/L) at 298 K. It can be observed clearly in CPE dl . The parameter n in the CPE element for the evaluated coating systems has values between 0.5 and 0.7 mainly because of the depression of semicircles and surface heterogeneities …”

Section: Resultsmentioning

confidence: 99%

Super-Anticorrosive Materials Based on Bifunctionalized Reduced Graphene Oxide

Ramírez-Soria

León-Silva

Rejón-García

et al. 2020

ACS Appl. Mater. Interfaces

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The design of new materials with two or more functional groups must be strongly considered to achieve multifunctional coatings with outstanding properties such as active−passive protection against corrosion, low-friction, antifouling, and sensing, among others. In this sense, nanocomposites based on solvent-free epoxy resin/bifunctionalized reduced graphene oxide layers with NH 2 and NH 3 + groups (ER/BFRGO) with super-anticorrosive properties are for the first time reported here. The amine groups (−NH 2 ) act as cross-linker agents, which react with epoxy terminal groups from resin, thus closing the gap between the BFRGO layers and the polymeric matrix. Meanwhile, the ammonium ions (−NH 3 + ) are effective trapping agents of negatively charged atoms or molecules (e.g., Cl − ). This novel combination enables us to obtain nanocomposite coatings with passive−active protection against corrosion. ER/BFRGO deposited onto A36 mild steel exhibited a remarkably enhanced barrier against corrosion into a saline medium (1 M NaCl; 58.4 g/L), wherein the corrosion current density (i corr ) was diminished 6 orders of magnitude (i corr = 5.12 × 10 −12 A/ cm 2 ), with respect to A36 mild steel coated only with ER (i corr = 2.34 × 10 −6 A/cm 2 ). Also, the highest polarization resistance R p = 6.04 × 10 7 Ω/cm 2 was obtained, which represents the lowest corrosion rate and corresponds to 3 orders of magnitude higher than A36 mild steel coated with ER (R p = 1.43 × 10 4 Ω/cm 2 ). The strategy of bifunctionalization proposed herein to obtain bifunctionalized reduced GO with NH 2 and NH 3 + groups has not been disclosed in the literature before; in consequence, this work opens a new pathway toward the design of smart materials based on multifunctional nanomaterials.

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“…The highest values were obtained for coatings obtained of 50 mA/cm 2 with electrodeposition time of 60 min and the smallest values were obtained for samples obtained of 40 mA/cm 2 with electrodeposition time of 30 min. Also, it could be observed that the smallest values of thickness layers it was obtained for coatings with plastic materials, probably the plastic materials used as disperse phase have an inhibition effect of zinc crystals growth and a catalytic effect in increasing nucleation sites, considering that the trends and influence of the polymers will be the same that in previous studies [29,30].…”

Section: Thickness Of the Coatingsmentioning

confidence: 56%

Evaluation of Corrosion Resistance in 3.5% NaCl Solution of Hybrid Coatings Obtained from Plastics Materials

Mureșan¹,

Buruiană²,

Carp³

et al. 2021

Mater. Plast.

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In this work, the corrosion resistance of hybrid coatings obtained from plastic materials was evaluated and compared with the corrosion resistance of Zn coatings. Zinc and hybrid coatings were obtained by electrodeposition from zinc sulphate electrolyte. For obtained hybrid coatings it was used as disperse phase two type of plastic materials: phenol-formaldehyde resin and epoxy resin. Polarization was used to measure the corrosion rate and behaviour of zinc and hybrid coatings in 3.5% NaCl solution. Tafel curves show that the including particles of plastic materials in zinc matrix disturbs the cathodic reactions and reduces anodic reaction leading to decrease of corrosion current and increase the corrosion resistance of hybrid coatings obtained at the same electrodeposition parameters as zinc coatings. Smallest values of corrosion rate were evaluated for hybrid coatings obtained with phenol-formaldehyde resin as disperse phase that indicates a good corrosion resistance in 3.5% NaCl solution.

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Corrosion resistance of zinc–resin hybrid coatings obtained by electro-codeposition

Cited by 9 publications

References 32 publications

Impact of silica nanoparticles on the morphology and mechanical properties of sol-gel derived coatings

Impact of silica nanoparticles on the morphology and mechanical properties of sol-gel derived coatings

Super-Anticorrosive Materials Based on Bifunctionalized Reduced Graphene Oxide

Evaluation of Corrosion Resistance in 3.5% NaCl Solution of Hybrid Coatings Obtained from Plastics Materials

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