Formation of Composite Coatings on Galvanized Steel from Organosilane Solutions Using Electrophoresis and Sol–Gel Technology

Abstract

New hybrid composite coatings (HCCs) on hot-dip galvanized steel (HDGS) were obtained using electrophoresis (cathodic polarization (CP)) and sol–gel technology. For this purpose, a technique for the preparation of a cationic precursor based on TiCl4 and aminopropyltriethoxysilane was developed. Electrophoresis of the charged particles of the precursor and organosilanes promotes the production of denser sol–gel coatings with improved adhesion. Using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS) methods, the formation mechanism and protective properties of HCC on galvanized steel were investigated.

Nanoimprint Lithography and Microinjection Molding Using Gas-Permeable Hybrid Mold for Antibacterial Nanostructures

“…A sol-gel copolymer (Fig. 2, a) with four components, namely, 40 wt% 3-(acryloyloxy) propyl trimethoxysilane, 35 wt% methyltrimethoxysilane, 15 wt% tetraethyl titanate, and 10 wt% tetraethoxysilane, was synthesized by using sol-gel polymerization [30][31][32]. The 87 wt% sol-gel copolymer was added with 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane (T2523: Tokyo Chemical Industry) (Fig.…”

Cold-Sprayed Composite Metal-Fluoropolymer Coatings for Alloy Protection against Corrosion and Wear

“…However, the most rational, effective, and inexpensive method of protection is the application of coatings [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. It is possible to use a paintwork material [13,19,30] (including those with additives of nanoparticles [25,[31][32][33][34][35][36][37][38] and inhibitors [13,14,20,[39][40][41][42][43][44][45][46][47]) and zinc coating to protect the material against its intensive destruction [48].…”

Vapor-Gas Deposition of Polymer Coatings on Metals and Mineral Carriers

“…There are few publications of steamgas coating on iron, copper and aluminum [4][5][6]. To form conversion coatings on aluminum and magnesium, sol-gel technologies based on triethoxysilanes are used [7,8]. At the same time, the formation of a strong covalent bond of the polymer with the carrier is guaranteed and the polymerization conditions in the surface layer are softened.…”