Investigation of polysiloxane coatings as corrosion inhibitors of zinc surfaces

Hansal, Wolfgang; Hansal, S.; Pölzler, Matthias; Kornherr, Andreas; Zifferer, Gerhard; Nauer, Gerhard

doi:10.1016/j.surfcoat.2005.01.049

Cited by 48 publications

(31 citation statements)

References 18 publications

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“…These results are in agreement with some researchers 26,27 who report that at higher temperatures, or whit the addition of a higher number of layers, an improved system in corrosion resistance can be achieved. However, the morphological analysis reveals the existence of microcracks systems for the T0, T1 and T2 samples, due to the fragility of thicker layers, and hence a decrease in corrosion resistance can be seen.…”

Section: Structural Featuressupporting

confidence: 93%

Effect of Tetraethoxy-silane (TEOS) Amounts on the Corrosion Prevention Properties of Siloxane-PMMA Hybrid Coatings on Galvanized Steel Substrates

et al. 2015

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Siloxane-poly(methyl methacrylate) (PMMA) organic-inorganic hybrid coatings were deposited on galvanized steel by the dip-coating sol-gel technique. Anticorrosion properties, as well as the morphological, surface and structural features were studied. Hybrid coatings were synthesized from tetraethoxy-silane (TEOS) and methyl methacrylate (MMA) as inorganic and organic phases, respectively, linked by 3-metacriloxypropyl-trimethoxysilane (TMSM) as a coupling agent. The MMA/TMSM ratio was kept constant, whereas the four TEOS/TMSM ratios were varied. The characterization of coatings was assessed using several techniques such as Scanning Electronic Microscopy (SEM), Contact Angle, Fourier Transform Infrared (FT-IR), Open Circuit Polarization (OCP), Atomic Force Microscopy (AFM) and Electrochemical Impedance Spectroscopy measurements (EIS). The EIS results, which were obtained for the hybrid coatings, were discussed based on an electrical equivalent circuit used to adjust the experimental data. The results showed that the increasing the TEOS content caused increase in coating thickness, increased in the surface roughness and increased in the surface hydrophobicity. The film with the highest TEOS content presented the best electrochemical performance, more effective in protecting against corrosion.

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Section: Structural Featuressupporting

confidence: 93%

Effect of Tetraethoxy-silane (TEOS) Amounts on the Corrosion Prevention Properties of Siloxane-PMMA Hybrid Coatings on Galvanized Steel Substrates

et al. 2015

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“…These results are in agreement with some researchers 21,22 who report that a further increase of thickness, or an addition of a higher number of layers, would promote an improvement of the system against corrosion. However, the morphological analysis shows microcracks for the films exposed to high curing temperature, due to the fragile state of thicker layers, and a consequent decrease in corrosion resistance.…”

Section: Morphological Characterizationsupporting

confidence: 93%

Effect of curing temperature and architectural (monolayer and bilayer) of hybrid films modified with polyethylene glycol for the corrosion protection on tinplate

et al. 2014

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Hybrid films obtained by a sol-gel process are based on two important reactions: hydrolysis and condensation. The condensation reaction is influenced by the curing temperature, since it induces the development of the intrinsic properties of the gel. The aim of this work is to coat tinplate, a substrate widely used in the packaging industry, with monolayered and bilayered hybrid films modified with polyethylene glycol and obtained through dip-coating. The results showed that the bilayered hybrid film obtained at 60°C had a higher layer thickness, and the best performance in the electrochemical assays, as well as the most hydrophobic character, in relation to the other samples. For the monolayered systems, the 90°C-cured system showed a lower layer thickness; however, this system showed a more compact, uniform and less porous layer, and presented better electrochemical impedance results, in comparison with the 60°C-cured samples.

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“…These results are in agreement with findings by varios researchers [13] who reported a further increase in film thickness after adding more layers to promote an improved system of protection against corrosion. However, films exposed to high curing temperatures have microcracks due to the fragile state of their thicker layers, and there is then a subsequent decrease in corrosion resistance.…”

Section: Influence Of Curing Temperature and Application Layerssupporting

confidence: 93%

Electrochemical and Mechanical Behavior of Uv Curing Paint on Hybrid Films Modified With Polyethyleneglycol Plasticizer Applied on Tinplate

Marcolin¹,

Beltrami²,

Boniatti³

et al. 2017

Tecnologia Em Metalurgia Materiais E Mineração

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The objective of this work is to coat tinplate with a hybrid film obtained from a sol-gel process constituted by the alkoxide precursor tetraethoxysilane (TEOS) and 3-trimethoxysilylpropyl methacrylate (TMSM), with the addition of cerium nitrate (0.01 M) and polyethyleneglycol plasticizer (20 g.L -1 ) to the sol formulation. The films were obtained by dip-coating, applying one and two layers and curing them at different temperatures (60°C and 90°C) for 20 minutes, and adhering UV curing paint to each film respectively. The results showed that the double layered hybrid film obtained at 60°C had a higher layer of thickness and the best performance in the electrochemical assays, in other words, higher resistance to corrosion. Furthermore, in studies following the application of UV coating, the hybrid-film monolayer cured at 60°C wich had an organic coating of cured UV applied to it, achieved a performance similar to that of the pretreated alkyd greenhouse currently used in the metal packaging industry.

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Investigation of polysiloxane coatings as corrosion inhibitors of zinc surfaces

Cited by 48 publications

References 18 publications

Effect of Tetraethoxy-silane (TEOS) Amounts on the Corrosion Prevention Properties of Siloxane-PMMA Hybrid Coatings on Galvanized Steel Substrates

Effect of Tetraethoxy-silane (TEOS) Amounts on the Corrosion Prevention Properties of Siloxane-PMMA Hybrid Coatings on Galvanized Steel Substrates

Effect of curing temperature and architectural (monolayer and bilayer) of hybrid films modified with polyethylene glycol for the corrosion protection on tinplate

Electrochemical and Mechanical Behavior of Uv Curing Paint on Hybrid Films Modified With Polyethyleneglycol Plasticizer Applied on Tinplate

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