The effect of self-organizing vinyl siloxane nanolayers on the corrosion behavior of aluminum in neutral chloride-containing solutions

Abstract

The methods of quartz crystal microbalance, atomic force microscopy (AFM), scanning electron microscopy (SEM), Fourier-transform IR spectroscopy, and X ray structural microanalysis were is used to show that adsorption of vinyl silane on an aluminum surface from an aqueous solution results in formation of a uniform, self organizing protective vinyl siloxane nanolayer covalently bound with surface metal groups. Its thickness can be controlled by variation of application conditions. The effect of a vinyl siloxane nanolayer on dissolution of aluminum is studied in chloride containing solutions. It is found that an ordered vinyl siloxane nanolayer with a thickness of up to 5 molecular layers causes efficient inhibition of uniform and local corro sion of aluminum. It is shown that the vinyl siloxane nanolayer is preserved on the surface of aluminum after 10 days of corrosion tests, which indicates its stability at exposure to water and corrosive components.

Effect of Organosilicon Self-Assembled Polymeric Nanolayers Formed during Surface Modification by Compositions Based on Organosilanes on the Atmospheric Corrosion of Metals

“…In previous works, we studied in detail the structure of layers formed on the surface of metals upon modification of their surface with organosilanes, with in particular, vinylsilane [ 10 , 34 , 35 ], BTA [ 36 ], and their mixture [ 6 , 26 ]. We found that a surface polymer-like layer was formed on the metal, cross-linked inside by siloxane (Si–O–Si) and siloxane–azole (Si–N) bonds.…”

Modification of bituminous coatings to prevent stress corrosion cracking of carbon steel

“…Since organosilanes are known adhesion promoters that improve the adhesion characteristics of a wide range polymeric coatings on inorganic substrates [7], it could be expected that incorporation of vinyl-and amino-containing silanes into a bitumenpolymeric coating would have no adverse effect on the coating adhesive properties. We studied the effect of organosilanes on the adhesion and adhesion water resistance of a bitumen-polymeric coating.…”

“…On the other hand, varying the chemical nature of organic radical R makes it possible to provide a high affinity of the nanolayer to a broad range of polymeric and paint materials [6]. It has been shown [7] that silanes can improve the corrosion resistance of metals. With this in mind, the purpose of this study was to develop a method for modifying a polymeric coating with organosilicon compounds that would hinder the SCC of pipe steel while maintaining high adhesion and water resistance of the insulation coating.…”

Corrosion Inhibition of Low-Carbon Steel by Hydrophobic Organosilicon Dispersions

“…In recent years, for corrosion prevention, new methods of metal surface modification have been used, based on the use of environmentally friendly substances, which include organosilicon compounds, in particular, organosilanes [1][2][3][4][5]. For these purposes, numerous studies are being carried out on the use of organosilanes as corrosion inhibitors for various metallic materials, including low-carbon steels [5][6][7][8][9][10][11][12][13]. Organosilanes are environmentally friendly substances that can stop the corrosive dissolution of a metal.…”