Effect of plasma surface treatment on mechanical and corrosion protection properties of UV-curable sol-gel based GPTS-ZrO2 coatings on mild steel

Kiruthika, P.; Subasri, R.; Jyothirmayi, A.; Sarvani, K.; Hebalkar, Neha

doi:10.1016/j.surfcoat.2009.10.017

Cited by 42 publications

(25 citation statements)

References 29 publications

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“…Atmospheric air plasma surface pretreatment is expected to improve the adhesion of coating with the substrate, thereby increasing the corrosion resistance property [25,26]. The corrosion current densities of GPZ and GPZ-plasma samples after 1 h and 24 h exposure time in 3.5% NaCl solution were seen to be nearly the same as seen from Table 1 and Figure 2.…”

Section: Effect Of Plasma Pretreatmentmentioning

confidence: 60%

“…This is due to the fact that the plasma treatment enables increased adhesion of coatings to substrate. Due to introduction of Ce 3+ in the coatings, there is less formation of inorganic network in the coatings and possibly more organic polymerization (cationic polymerization of epoxy groups from the GPTMS precursor catalyzed by Zr 4+ [26] and additionally by Ce 4+ ). This possibility has been stated since the viscosity of the GPZ sol with Ce 3+ was observed to increase more rapidly with time than the sol without Ce 3+ .…”

Section: Effect Of Ce 3+ Doping Along With Plasma Pretreatmentmentioning

confidence: 99%

“…It is possible to further improve the adhesion of the sol-gel coatings through surface pretreatments. It has already been reported that an atmospheric air plasma surface pretreatment improves the adhesion of sol-gel coatings to aluminum and mild steel surfaces [25,26]. Though there are several investigations reported on cerium ion-doped sol-gel coatings on aluminum alloys, there are no studies reported so far on the influence of a plasma surface pretreatment on corrosion protection of Ce 3+ -based self-healing sol-gel coatings on aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Plasma Surface Pretreatment on Ce³⁺-Doped GPTMS-ZrO₂ Self-Healing Coatings on Aluminum Alloy

2012

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A hybrid sol synthesized from an acid-catalyzed hydrolysis and condensation reaction of 3-glycidoxypropyltrimethoxysilane (GPTMS) and zirconium n-propoxide was used as a matrix nanocomposite sol. To this sol, 0.01 M Ce 3+ was added as an inhibitor to provide a self-healing coating system. The effect of an atmospheric air plasma surface pretreatment of aluminum alloy substrates prior to coating deposition of Ce 3+ -doped/undoped GPTMS-ZrO 2 sol was studied with respect to corrosion protection. Coatings were generated by a dip coating technique employing a withdrawal speed of 5 mm/s and thermally cured at 130• C for 1 h. The coated Al surfaces were characterized using potentiodynamic polarization studies and electrochemical impedance spectroscopy. They were also subjected to accelerated corrosion testing using neutral salt spray test with 5% NaCl solution after creating an artificial scratch for more than 200 hours to assess the self-healing ability of coatings. It was observed that cerium (III) doping was effective for corrosion protection during long-term exposure to the electrolyte solution, and a plasma surface pretreatment of substrates prior to coating deposition of Ce 3+ -doped coatings improved the adhesion of coatings that provides enhanced corrosion protection along with self-healing ability exhibited in case of damages/scratches caused in the coating.

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Section: Effect Of Plasma Pretreatmentmentioning

confidence: 60%

Section: Effect Of Ce 3+ Doping Along With Plasma Pretreatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Plasma Surface Pretreatment on Ce³⁺-Doped GPTMS-ZrO₂ Self-Healing Coatings on Aluminum Alloy

2012

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“…Furthermore, the coating porosity (expressed in percentage) can also be determined from the following equation [190,191]:…”

Section: Polarization Resistance (R P )mentioning

confidence: 99%

Corrosion Protection Systems and Fatigue Corrosion in Offshore Wind Structures: Current Status and Future Perspectives

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Concerns over reducing CO 2 emissions associated with the burning of fossil fuels in combination with an increase in worldwide energy demands is leading to increased development of renewable energies such as wind. The installation of offshore wind power structures (OWS) is one of the most promising approaches for the production of renewable energy. However, corrosion and fatigue damage in marine and offshore environments are major causes of primary steel strength degradation in OWS. Corrosion can reduce the thickness of structural components which may lead towards fatigue crack initiation and buckling. These failure mechanisms affect tower service life and may result in catastrophic structural failure. Additionally, environmental pollution stemming from corrosion's by-products is possible. As a result, large financial investments are made yearly for both the prevention and recovery of these drawbacks. The corrosion rate of an OWS is dependent on different characteristics of attack which are influenced by access to oxygen and humidity. Structural degradation can occur due to chemical attack, abrasive action of waves, and microorganism attacks. Inspired by technological and scientific advances in recent years, the purpose of this paper is to discuss the current protective coating system technologies used to protect OWS as well as future perspectives.

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“…A quebra das ligações C=C dos monômeros MMA não polimerizados auxilia na densificação do filme pelo aumento no grau de policondensação através da formação de ligações covalentes entre os grupos siloxanos RO-Si-OH melhorando as propriedades do revestimento contra a corrosão, por obter filmes mais homogêneos, com boas propriedades mecânicas, transparentes e sem trincas, evitando a difusão de componentes corrosivos em direção ao substrato, Kiruthika et al (2010). Este fato foi demonstrado por espectroscopia de fotoelétrons induzida por raios X (XPS) e também foi verificado que o aumento da relação TEOS/MPTS afeta a estrutura do filme híbrido, ficando mais ramificada, mas não afetou a extensão orgânica polimerizada de MMA, ou seja, esta permanece inalterada (SCHIAVETTO, 2009).…”

Section: Etapa De Obtenção Da Solução De Híbridounclassified

Revestimento híbrido à base de TEOS/MPTS/MMA para proteção de aço-carbono e quinonas como agente anti-gelificante.

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RESUMOO problema de corrosão é frequente para ligas ferrosas, notadamente o aço carbono. Para evitar os danos causados pela corrosão, uma série de processos é utilizada como o uso de ligas mais resistentes, filmes de pré-tratamento e a aplicação posterior de tintas ou vernizes, aplicação de banhos eletrolíticos para eletrodeposição de metais e outros. Os últimos desenvolvimentos tecnológicos relacionados à nanotecnologia trazem alternativas que consiste na aplicação de uma camada muito fina baseada em silanos como pré-tratamento de aço carbono para posterior pintura a fim de aumentar a aderência desta ao substrato pintado.Este pré-tratamento surge como alternativa ao uso de materiais nocivos ao meio ambiente e à saúde, como são o processo de fosfatização e os compostos de cromo hexavalente aplicados como eventuais passivantes após a fosfatização.Questões ambientais, de segurança e de custos têm sido consideradas, atualmente, no que diz respeito à utilização desses processos. Por esta razão, aumentaram as pesquisas de outros métodos de proteção contra a corrosão para aço carbono. O uso de silanos tem demostrado ser uma alternativa promissora como pré-tratamento por serem promotores de aderência e conferirem melhor resistência contra a corrosão em diferentes aplicações. A aplicação de pré-tratamentos com filmes híbridos, isto é, com características de filmes orgânicos como flexibilidade e características de filmes inorgânicos ou cerâmicos como elevada dureza e resistência a altas temperaturas, tem sido estudada com relativo sucesso. polymerization time the study of use of different quinones (hydroquinone and pbenzoquinone) was made and p-benzoquinone was found to be the best anti-gelling agent. It was found that the thickness of the film layer increases with longer shelf life of the hybrid solution, which leads to more effective barrier films against corrosion.The viscosity was measured for each hybrid solution: for those that were not used for the deposition of films and for those that were used for the deposition of films, with or without quinones. It has been noted that the viscosity of the hybrid solution not used for the deposition of films was kept nearly constant but the viscosity increased with the shelf life for the hybrid solution that served for the hybrid film deposition on the metallic substrate, due to the influence of the metallic ions from the substrate released in the hybrid solution that can catalyze polimerization reactions of silanes and MMA monomer generating molecules of high molecular weight. A Kumon Pedro Poveda, Santa Cruz de la Sierra, Bolivia pelo apoio incondicional (Bertha Bravo).A Bracco Consultora, Engenharia e Construção. Pelo apoio total. (Humberto Bravo).

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Effect of plasma surface treatment on mechanical and corrosion protection properties of UV-curable sol-gel based GPTS-ZrO2 coatings on mild steel

Cited by 42 publications

References 29 publications

Effect of Plasma Surface Pretreatment on Ce³⁺-Doped GPTMS-ZrO₂ Self-Healing Coatings on Aluminum Alloy

Effect of Plasma Surface Pretreatment on Ce³⁺-Doped GPTMS-ZrO₂ Self-Healing Coatings on Aluminum Alloy

Corrosion Protection Systems and Fatigue Corrosion in Offshore Wind Structures: Current Status and Future Perspectives

Revestimento híbrido à base de TEOS/MPTS/MMA para proteção de aço-carbono e quinonas como agente anti-gelificante.

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Effect of plasma surface treatment on mechanical and corrosion protection properties of UV-curable sol-gel based GPTS-ZrO2 coatings on mild steel

Cited by 42 publications

References 29 publications

Effect of Plasma Surface Pretreatment on Ce3+-Doped GPTMS-ZrO2 Self-Healing Coatings on Aluminum Alloy

Effect of Plasma Surface Pretreatment on Ce3+-Doped GPTMS-ZrO2 Self-Healing Coatings on Aluminum Alloy

Corrosion Protection Systems and Fatigue Corrosion in Offshore Wind Structures: Current Status and Future Perspectives

Revestimento híbrido à base de TEOS/MPTS/MMA para proteção de aço-carbono e quinonas como agente anti-gelificante.

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Product

Resources

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Effect of Plasma Surface Pretreatment on Ce³⁺-Doped GPTMS-ZrO₂ Self-Healing Coatings on Aluminum Alloy

Effect of Plasma Surface Pretreatment on Ce³⁺-Doped GPTMS-ZrO₂ Self-Healing Coatings on Aluminum Alloy