Self-healing coatings of inorganic particles using a pH-sensitive organic agent

Yabuki, Akihiro; Sakai, Mariko

doi:10.1016/j.corsci.2010.11.021

Cited by 44 publications

(7 citation statements)

References 40 publications

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“…Depending on the hydrogen ions concentration, casein forms agglomerates or is dispersed. An increase in the pH near a coating defect, caused by the digestion of the alloy, contributes towards the release of casein from the coating, which in turn entails the displacement of TiO 2 particles which diffuse to the damaged place, forming a barrier layer there [118]. This kind of coating deserves special attention because of the use of the naturally occurring compound as the inhibitor.…”

Section: Other Self-healing Coatingsmentioning

confidence: 99%

Self-healing coatings in anti-corrosion applications

2013

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Nonmetallic (based on polymers or oxides) and metallic protective coatings are used to protect metal products against the harmful action of the corrosion environment. In recent years, self-healing coatings have been the subject of increasing interest. The ability of such coatings to self-repair local damage caused by external factors is a major factor contributing to their attractiveness. Polymer layers, silica-organic layers, conversion layers, metallic layers and ceramic layers, to mention but a few, are used as self-healing coatings. This paper presents the main kinds of self-healing coatings and explains their selfhealing mechanisms.

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Section: Other Self-healing Coatingsmentioning

confidence: 99%

Self-healing coatings in anti-corrosion applications

2013

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“…It is known that the inhibitory effect may be caused by the inhibition of anodic reaction, the inhibition of cathodic reaction and inhibition of both responses (Galvão et al, 2016;Alibakhshi et al, 2016;Poznyak et al, 2009;Alibakhshi et al, 2017;Tedim et al, 2012;Yabuki and Sakai, 2011;Subasri et al, 2019). It is interesting to compare the composition of the pigment with its anti-corrosive effect, as well as to take into account the effect of the nature of the cations and anions on the corrosion rate.…”

Section: Resultsmentioning

confidence: 99%

Investigation of color and anticorrosive properties of pigments in the Fe-Al-Mg-O-H system by the simplex lattice method

Frolovа

Butyrina

2020

PRT

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Purpose The purpose of this paper is to study the patterns of formation of anti-corrosion properties, the development of compositions for pigments by using the method of co-precipitation and subsequent heat treatment. Design/methodology/approach To obtain co-precipitated hydroxides, aqueous solutions of salts were used. The conditions of synthesis varied according to the following parameters: the nature of the starting salts of metals; and the ratio of metal cations. The anticorrosive activity of the pigments was evaluated by the potentiodynamic method, by comparing the anodic and cathodic polarization curves, and calculated potentials and corrosion currents on the basis of regions of Tafel on curves. Polarization curves were obtained by using Potentiostat/Galvanostat/ZRA Gamry, which connected to the PC, and by using the program Gamry Framework. The measurement results were processed by using the method of simplex-lattice planning. X-ray diffractograms of pigments were recorded on a DRON – 2.0 diffractometer (monochromatic copper radiation with a nickel filter). Findings The paper deals with the results of research the dependence of colour characteristics and anticorrosion properties of synthesized compositions on their nature and composition. The presence of aluminium cations leads to the formation of solid solutions of ferrum and aluminium oxyhydroxides. Originality/value The main technological properties of pigments are determined by the anionic and cationic composition. Colour characteristics are determined by the cation-chromophore. The anti-corrosive properties of non-calcined pigments are determined to a greater extent by the presence of the formed hydroxyl ions and the composition of the compounds. The greatest protective effect is observed when using double compounds of metals, the dissociation constants of which differ significantly. The protective effect is mainly determined by the slowdown of the anode process. Anions containing aluminium atoms accelerate the corrosion processes.

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“…[11][12][13] Recent works showed that inorganic materials improves the corrosion resistance of organic coatings by enlarging the route of corrosive ions and water in the coating to reach the metal/ coating interface and enhance the barrier effects of coating matrix. 14,15 In our previous works the effects of new inorganic materials on corrosion resistance and mechanical properties of organic coating were studied. [16][17][18][19][20] We proved in these works that the nanoparticles of inorganic materials improve the corrosion resistance and mechanical properties of organic coating.…”

Section: Introductionmentioning

confidence: 99%