Protective properties of organic phosphate-pigmented coatings on phosphated steel substrates

Zubielewicz, M.; Kamińska-Tarnawska, E.; Kozłowska, Anna

doi:10.1016/j.porgcoat.2005.02.008

Cited by 16 publications

(9 citation statements)

References 3 publications

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“…Then, the tests were performed in the selected nodes using electrochemical impedance spectroscopy (EIS). This method required at least three test points within the areas with the lowest (8), moderate (9), and highest (10) thickness of the coating. Taking into account various thickness ranges, particularly the outliers, was very crucial for the EIS, as barrier properties of the coating usually improve as its thickness increases.…”

Section: Proposed Methods To Diagnose Large Anti-corrosion Coatingsmentioning

confidence: 99%

“…Unfortunately, durability of this coating is also time-restrained, and its regular renewing is necessary [ 6 , 7 ]. Identifying the moment at which the paint coating lacks its proper barrier properties and its protective properties against corrosion are reduced is crucial for economic and durability reasons [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Then, ions close to the metal surface (5) initiate corrosion in the presence of moisture and oxygen; the corrosion develops below the surface by creating a system of galvanic and concentration cells [1]. Due to oxidation, erosion, and coating aging, as well as accumulation of corrosion products (9) under the coated surface (Figure 1c), the coating shows more defects with time, which reduce its integrity and increase conductivity, which can be measured using the EIS method. Electrochemical impedance spectroscopy is a method used to measure the coating impedance R c within a wide range of frequencies, and the capacitance response expressed as capacitance C c or the constant phase element (CPE).…”

Section: Introductionmentioning

confidence: 99%

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Diagnostics of Large Non-Conductive Anti-Corrosion Coatings on Steel Structures by Means of Electrochemical Impedance Spectroscopy

Jaśniok

Skórkowski

2021

Materials

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This paper proposes a testing methodology for barrier properties of large non-conductive anti-corrosion coatings on steel structures. Electrochemical impedance spectroscopy (EIS) was adapted to in situ testing of steel structures by using a prototypical flexible measuring probe and a gel electrolyte that filled the probe, to take measurements on any surface regardless of its position. The first stage of the testing methodology was to perform time-consuming impedance measurements and quick electromagnetic measurements of coating thickness at selected test points. The results were used to determine correlation relationships between the logarithm of the impedance modulus for the coating at a measuring frequency of 0.1 Hz measured with the EIS method and the average thickness of the coating measured with an electromagnetic thickness gauge. Quick electromagnetic measurements were performed in the second stage to specify thickness of the other surface of the steel structure coating. The barrier properties of this coating were identified on the basis of the determined correlation.

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Section: Proposed Methods To Diagnose Large Anti-corrosion Coatingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diagnostics of Large Non-Conductive Anti-Corrosion Coatings on Steel Structures by Means of Electrochemical Impedance Spectroscopy

Jaśniok

Skórkowski

2021

Materials

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“…Porém a fosfatização requer um elevado consumo de água, energia e rigorosos processos de tratamento do efluente gerado. Com isso, investe-se em pesquisas de novos pré-tratamentos que apresentem qualidade igual ou superior à fosfatização e que não ocasione impacto nocivo ao meio ambiente além de promoverem a aderência entre o polímero orgânico (tinta) e a superfície inorgânica, garantindo resistência a corrosão, como por exemplo os pré-tratamentos nanocerâmicos e silanos [6].…”

Section: Introductionunclassified

Influência De Três Pré-Tratamento De Superfície Com Posterior Aplicação De Tinta Poliéster Na Resistência a Corrosão Do Aço Aisi 1008

Marcolin¹,

Pederiva²,

Salvador³

et al. 2017

Tecnologia Em Metalurgia Materiais E Mineração

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ResumoO objetivo deste estudo é analisar a influência de diferentes pré-tratamentos de superfície (fosfato, nanocerâmico e silano) na resistência à corrosão do aço AISI 1008, visando uma posterior aplicação da tinta poliéster. Os pré-tratamentos foram depositados sobre o substrato de maneira distinta. O fosfato teve sua aplicação em escala industrial por meio de pulverização em um sistema onde o desengraxe foi realizado ao mesmo estágio da fosfatização. No nanocerâmico utilizou-se o método por imersão com pH controlado em torno de 4,5 em uma solução de ácido hexafluorzircônio. Para o silano utilizou-se o método de dip-coating, para a aplicação dos precursores tetraetoxisilano (TEOS) e 3-(trimetóxisililpropil) metacrilato (MPTS) pré-hidrolizados. As amostras pré-tratadas foram caracterizadas quanto ao comportamento morfológico e eletroquímico. Após a aplicação de tinta poliéster, as amostras foram avaliadas quanto ao seu comportamento mecânico. Os resultados das análises para os pré-tratamentos superficiais e para os sistemas pré-tratamentos + tinta mostraram que o silano apresentou a melhor resistência à corrosão em relação ao sistema nanocerâmico e fosfatização. Palavras-chave: Fosfatização; Silano; Nanocerâmicos; Tinta poliéster; Corrosão. INFLUENCE OF THREE SURFACE PRE-TREATMENTS WITH SUBSEQUENT APPLICATION OF POLYESTER INK IN CORROSION RESISTANCE OF AISI 1008 STEEL AbstractThe objective of this study was to analyze the influence of different surface pre-treatments (phosphate, nano-ceramic and silane) on the corrosion resistance of AISI 1008 steel, with a view to the subsequent application of polyester ink. The pre-treatments were deposited on the substrate in distinct ways. Phosphate was applied on an industrial scale by spraying in a system where degreasing was carried out at the same stage of phosphating. In the nano-ceramic pre-treatment the immersion method was used, with controlled pH of about 4.5 in a solution of hexafluorzirconium acid. For the silane pre-treatment the dip-coating method was used for the application of pre-hydrolysed tetraethoxysilane (TEOS) and 3-(trimethylsilylpropyl) methacrylate (MPTS) precursors. The pre-treated samples were characterized for morphological and electrochemical behavior. After the application of polyester ink, the samples were evaluated for their mechanical behavior. The results for the surface pre-treatments and for the pre-treatment + ink systems showed that silane presented the best corrosion resistance amongst the tested pre-treatments.

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“…Organic paints are generally made up of binder systems, anticorrosive pigments, fillers, solvents, and various additives [2,3]. The anticorrosive ability of coating films rests with metal surface treatment, the type and concentration of anticorrosive pigment, the way of coating formation, and so on [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Aluminum Tripolyphosphate on the Protective Behavior of an Acrylic Water-Based Paint Applied to Rusty Steels

Song

Gao

Shen

et al. 2015

Journal of Chemistry

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The protective performance, in conditions of total immersion, of an acrylic water-based paint applied to rusty steel, has been studied using electrochemical techniques. There was no rust, blister, crack, or flake that occurred on coating after 500 h immersion. The data obtained have enabled the protective mechanism to be proposed. The specific pigments utilized in the formulation of the paint studied can release phosphates to form a protective layer on metal substrate, which can impede the access of aggressive species to substrate surface. The coatings performed electrochemical activity in the beginning of immersion; then the layer formed and resistance of coating increased.

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Protective properties of organic phosphate-pigmented coatings on phosphated steel substrates

Cited by 16 publications

References 3 publications

Diagnostics of Large Non-Conductive Anti-Corrosion Coatings on Steel Structures by Means of Electrochemical Impedance Spectroscopy

Diagnostics of Large Non-Conductive Anti-Corrosion Coatings on Steel Structures by Means of Electrochemical Impedance Spectroscopy

Influência De Três Pré-Tratamento De Superfície Com Posterior Aplicação De Tinta Poliéster Na Resistência a Corrosão Do Aço Aisi 1008

The Influence of Aluminum Tripolyphosphate on the Protective Behavior of an Acrylic Water-Based Paint Applied to Rusty Steels

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