Improving the formation and protective properties of silane films by the combined use of electrodeposition and nanoparticles incorporation

Liu, Liang; Hu, Ji-Ming; Cao, Chenzhong

doi:10.1016/j.electacta.2006.05.034

Cited by 80 publications

(44 citation statements)

References 30 publications

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“…One way to increase the robustness and thickness of the layer is by the inclusion of additives in the silane deposits, such as silica or alumina nanoparticles [14,15] or inhibitors [16,17]. Although these new methods have achieved some improvement compared to just silane films, new formulations are required in order to raise the durability of their anticorrosive power.…”

Section: Introductionmentioning

confidence: 98%

Organosilanes and polypyrrole as anticorrosive treatment of aluminium 2024

et al. 2009

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This paper addresses the preparation and characterisation of anticorrosive silane-and polypyrrole-based organic coatings and combinations of the two on aluminium 2024. Layer adsorption studies of organosilanes such as propyl (C3), octyl (C8) and octadecyl (C18) trimethoxysilane and polypyrrole deposits on the aluminium electrodes reveal only limited protection. Their anticorrosive power declines when they are subject to highly corrosive environments, such as salt fog cabinets, for extended periods. The combination of both deposits yields a more protective structure that affords better protection with time. The best performance is achieved with polypyrrole deposits on silanes due to the excellent bonding between the silane adsorbed on the surface of the material and the polypyrrole film. Of the three organosilanes used, the one with the shortest chain performs best. When long-chain organosilanes are used, the polypyrrole film becomes detached due to the lesser interaction between the layers. Electrochemical impedance spectroscopy and morphological studies of the layers also show the greater adhesion and lesser deterioration of polypyrrole deposits on silane layers.

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Section: Introductionmentioning

confidence: 98%

Organosilanes and polypyrrole as anticorrosive treatment of aluminium 2024

et al. 2009

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“…This makes the analysis of the results more complicated. Some authors rinsed [22] or blow-dried (with nitrogen [10]) the samples after deposition, assuming that the layer deposited by dipping could be removed leaving the electrodeposited layer mostly unaffected. Here, it was decided to measure the thickness of the dipping layer by depositing it using the same solutions, but without any voltage applied, and to take this thickness into account when evaluating the electrodeposited one, by subtracting the first from the total thickness measured.…”

Section: Methodsmentioning

confidence: 99%

“…The same authors published two articles in which they showed that it is possible to deposit zirconia [2] and titania [3] films. Since then, the electro-assisted deposition has been used to produce nanocomposites [4][5][6], anticorrosion protective layers [7][8][9][10][11][12][13][14][15][16] and mesoporous silica [17][18][19][20]. More recently, an interesting application of the mechanism of electrodeposition has been exploited: the formation of patterns using the scanning electrochemical microscopy (SECM) to locally increase the electron concentration and therefore the electro-generation of hydroxide ions [21].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical deposition of silica sol–gel films on stainless steel: preliminary analysis of key variables

Giordano

Durante

Gennaro

et al. 2015

J Sol-Gel Sci Technol

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The sol-gel electrodeposition of coatings on conductive substrates has been presented the first time in 1999, and since then, a significant number of papers have been published, mainly devoted to explore the possibilities of application. However, a clear and complete picture of the fundamental aspects and of the role of the many parameters involved is still lacking. In this work, which is intended to be a preliminary approach to a systematic study, the effect of potential and time on the coating thickness was studied, trying to analyze the different factors that make experimentation difficult, looking for possible solutions and putting the basis for a more complete and analytic investigation. Simple tetraethyl orthosilicatebased acidic solutions were used to coat planar stainless steel samples. Different starting solutions were tested, varying the amount of precursor, water and hydrochloric acid. The role of working temperature, oxygen concentration and the presence of potassium nitrate until saturation was tested. Morphology, thickness, cyclic voltammetry and chronoamperometry were used to characterize the coatings and to monitor the current in function of potential and time. The thickness was found to increase with both the concentration of the solution and the HCl/TEOS ratio. Temperature was found to be an important factor, but also the amount of oxygen and electrolyte (KNO 3 ) in solution seems to influence the thickness of coatings. Graphical Abstract

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“…The silane film was also showed that to be thickened and strengthened by loading silica nanoparticles into the film [2]. Liu et al [25] prepared silica nanoparticle-filled dodecyltrimethoxysilane films by electrodeposition technique. Experimental results showed that even tiny amounts of the nanoparticles could improve the protectiveness of dodecyltrimethoxysilane-treated aluminum, while higher amounts of silica would make the film porous, leading to the facilitation of electrolyte penetration.…”

Section: Introductionmentioning

confidence: 97%