The corrosion resistance of 316L stainless steel coated with a silane hybrid nanocomposite coating

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

doi:10.1016/j.porgcoat.2011.08.001

Cited by 58 publications

(13 citation statements)

References 36 publications

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“…It is well‐known that thin silane sol–gel films providing efficient barrier against oxygen diffusion to the metal interface could not ensure any active protection as water and aggressive ions come into contact with the metallic substrate through small cracks and defects . To enhance corrosion inhibition properties of the surface treatment, several approaches have been proposed to overcome the problem such as optimization of curing time and temperature, composite PPySi films containing polysiloxane linkages and polypyrrole units, modification of some silane solution parameters such as pH, type and amount of solvent/alkoxide ratio, the films loaded with organic (e.g.…”

Section: Introductionmentioning

confidence: 99%

Optimization of silane sol–gel coatings for the protection of aluminium components of heat exchangers

Naderi

Fedel

Urios

et al. 2013

Surface & Interface Analysis

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Despite the relatively low mechanical properties respect to the aluminium alloys but due to high thermal exchange capacity, pure aluminium (AA1XXX series) is widespread for industrial applications for heat exchanger components or cooling systems (like refrigerator systems). The corrosion protection properties of aluminium components are commonly enhanced by applying organic coatings or by performing chemical conversion treatments on aluminium surface. One of the routes for the protection of aluminium components for heat exchangers is the application of silane sol-gel coatings. In this work, a thin silane sol-gel coating improving the corrosion protection of aluminum for heat exchanger and avoiding the loss of thermal exchange due to the presence of the protective layer was developed. Prior to deposit, the silane layer as a mixture of three different silicon alkoxides precursors (such as tetraethoxysilane, glycidoxypropyltrimethoxysilane and methyltrithoxysilane), the optimum surface chemical treatment of the 1050 aluminum alloy, widely employed in the heat exchanger and cooling system industry, was investigated using electrochemical impedance spectroscopy (EIS). In order to enhance protective properties, different amounts of nano-sized sodium montmorillonite were embedded into the silane network. Through taking advantage of some parameters extracted from EIS, the most efficient concentration of nanoclay was determined, confirmed by scanning electron microscopy and Fourier transform infrared analysis as well. The resistance of the different sol-gel layers to thermal cycles (strictly related to the application in the heat exchanger industry) was carried out to stress the sol-gel coating. The behavior of the investigated sol-gel layer after the thermal cycles was evaluated by means of EIS.

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Section: Introductionmentioning

confidence: 99%

Optimization of silane sol–gel coatings for the protection of aluminium components of heat exchangers

Naderi

Fedel

Urios

et al. 2013

Surface & Interface Analysis

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“…To accelerate the condensation reaction, 0.0152 mL of 1–methylimidazol (MI, Merck) was added to the solution and stirred for 5 min. A clear, colorless, homogenous solution resulted .…”

Section: Methodsmentioning

confidence: 99%

“…The zinc coating had a weight of 112 g/m 2 , and a thickness of 8 μm. The galvanized steel specimens were degreased using an alkaline cleaner, washed with distilled water, dried in air, and immersed in the silane solution for 60 s. The coated specimens were dried at room temperature for 24 h, and subsequently submitted to a 25–130 °C curing process with a heating rate of 7.5 °C/min for 90 min, to initiate extensive cross‐linking in the hybrid films . The coatings thickness was measured by an eddy‐current method (Check line 3000 pro, Germany) as shown in Table .…”

Section: Methodsmentioning

confidence: 99%

Self‐healing silane coatings of cerium salt activated nanoparticles

Zand

Flexer

Keersmaecker

et al. 2016

Materials & Corrosion

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This work investigates the effect of cerium salt activated nanoparticles as nanoreservoirs on the self-healing properties of silane hybrid coatings deposited on electro-galvanized steel substrates. The substrates were pre-treated with 3-glycidoxypropyl-trimethoxysilane (GPTMS) and bisphenol A (BPA), modified with cerium ion-activated CeO2-ZrO2 and CeO2-SiO2 nanoparticles. The morphology of the coating before corrosion tests was examined using atomic force microscopy (AFM). The results indicate the formation of nanostructured surfaces with relatively uniform dispersion of nanoparticles in the silane coating containing CeO2-ZrO2 nanoparticles. The corrosion behavior of the sol-gel coatings was also investigated using salt spray tests, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization tests. During the salt spray test, the samples are exposed 600 h (or 25 days), revealing the improved resistance of the coated substrate containing CeO2-ZrO2 nanoparticles. Incorporation of activated CeO2-ZrO2 nanoparticles reduces the cathodic and anodic current density by one order of magnitude and shifts the corrosion potential to more positive values compared with the coating containing CeO2-SiO2 nanoparticles. Also, the EIS test results revealed higher impedance for the coating containing activated CeO2-ZrO2 nanoparticles. Corrosion tests results suggest that the activated CeO2-ZrO2 nanoparticles are more effective as nano-structured cerium ion reservoirs and can provide prolonged release of the inhibitor ions

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“…Na pesquisa desenvolvida por Zand et. al [11], o silano hibrido 3-glicidoxipropil-trimetoxisilano (GPTMS) foi utilizado para a obtenção do revestimento compósito sobre o substrato de aço inoxidável AISI 316L. A resistência à corrosão foi avaliada por ensaios de névoa salina, polarização e espectroscopia de impedância eletroquímica.…”

Section: Influência Da Modificação Superficial Sobre a Resistência à unclassified

Influência Da Modificação Superficial Sobre a Resistência À Corrosão Do Aço Inoxidável Aisi 204 Com Revestimento Hidrofóbico

Sacilotto¹,

Ferreira²

2016

TMM

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ResumoNeste trabalho foi avaliada a resistência à corrosão do aço inoxidável AISI 204 revestido com filme hidrofóbico de silano. Quatro sistemas foram analisados combinando o tempo de hidrólise do silano na solução sol-gel e a rugosidade do substrato. Estes parâmetros foram definidos como: 24 horas de hidrólise e substrato rugoso (24HJ), 2 horas de hidrólise e substrato rugoso (2HJ), 2 e 24 horas de hidrólise com o substrato liso (2HN e 24HN). As amostras foram caracterizadas por diferentes técnicas: (a) microscopia eletrônica de varredura (MEV) foi usada para verificar a morfologia dos substratos; (b) medidas de ângulo de contato para verificar a eficiência do filme hidrofóbico desenvolvido neste estudo; (c) ensaios de névoa salina e espectroscopia de impedância eletroquímica (EIE) foram realizados para avaliar a resistência à corrosão. A amostra 24HJ que apresentou o maior ângulo de contato (130°) mostrou maior resistência à corrosão em comparação com as outras amostras. A metodologia usada para a obtenção do filme hidrofóbico mostrou-se eficiente para a proteção do metal base contra a corrosão. Palavras-chave: Revestimento hidrofóbico; Ângulo de contato; Resistência à corrosão; Modificação superficial; Silano. INFLUENCE OF MORPHOLOGICAL ALTERATION ON CORROSION RESISTANCE OF STAINLESS STEEL AISI 204 WITH HYDROPHOBIC COATINGS AbstractThis work studied the corrosion resistance of stainless steel AISI 204 coated by hydrofobic silane film. Four systems were evaluated matching silane hydrolysis time in sol-gel solution and the roughness of the substrate. These parameters were defined as: 24 hours of hydrolysis time and roughness substrate (24HJ), 2 hours hydrolysis time and roughness substrate (2HJ), 2 and 24 hours hydrolysis time with smooth substrates (2HN and 24HN). The following characterizations was applied: (a) scanning electron microscope (SEM) was used to check the substrates morphology; (b) the contact angle measurements (CA) tested the efficiency of hydrophobic film developed in this study; (c) the salt spray tests and electrochemical impedance spectroscopy (EIS) were performed for evaluating the corrosion resistance. The 24HJ presented higher water contact angle (130°) and it demonstrated greater corrosion resistance in comparison with the other samples. The methodology used to obtain the hydrophobic film presented efficient for the base metal corrosion protection. Keywords: Hydrophobic coatings; Water contact angle; Corrosion resistance; Surface modification; Silane. INTRODUÇÃOUm revestimento hidrofóbico é caracterizado por repelir a água quando em interação com algum material sólido. Para um revestimento ser considerado hidrofóbico é necessário que o ângulo de contato formado entre a superfície revestida e uma gota de água seja maior ou igual a 90°, enquanto que uma superfície superhidrofóbica apresenta um ângulo de contato (CA) maior ou igual a 150°. Superfícies hidrofóbicas tem despertado a atenção de muitas pesquisas acadêmicas e também tecnológicas devido a algumas propriedades que estes revestimen...

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The corrosion resistance of 316L stainless steel coated with a silane hybrid nanocomposite coating

Cited by 58 publications

References 36 publications

Optimization of silane sol–gel coatings for the protection of aluminium components of heat exchangers

Optimization of silane sol–gel coatings for the protection of aluminium components of heat exchangers

Self‐healing silane coatings of cerium salt activated nanoparticles

Influência Da Modificação Superficial Sobre a Resistência À Corrosão Do Aço Inoxidável Aisi 204 Com Revestimento Hidrofóbico

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