Silane based chromate replacements for corrosion control, paint adhesion, and rubber bonding

Abstract

An overview is given of the use of silanes for corrosion is largely based on electrochemical impedance speccontrol of metals and bonding of silane treated metals troscopy (EIS) measurements. to paint systems and rubber compounds. Examples are given of corrosion protection of cold rolled steel, T he authors are in the Department of Materials galvanised steel, aluminium, and magnesium, both Science and Engineering, University of Cincinnati, painted and unpainted. Emphasis in this work has been Cincinnati, OH 45221-0012, USA. Manuscript on the use of bis-silanes rather than the conventional mono-silanes. It is shown that mixtures of a bis-amino and a bis-polysulphur silane work with a wide range of metals and paint systems. A model is described which

Experimental Novel Silane System in Adhesion Promotion between Dental Resin and Pretreated Titanium. Part II: Effect of Long-Term Water Storage

“…Accordingly, dilute solutions of activated (hydrolyzed) silanes wet a substrate effectively and displace Table 2 Mean shear bond strength with standard deviation (SD), after all four storage types (n=10 per group) [14] Table 3 Statistical analysis of data from this and a previous study [14] using tests of between-subject effects (two-way ANOVA) for the shear bond strength of the experimental silane primers a. R squared=0.864 (adjusted R squared=0.849) air from its surface, without having to be 100% hydrolyzed [3,6,7]. Silane coupling agents exhibit strong adhesion to clean metal, metal oxide, glass surfaces and, in particular, silica surfaces.…”

“…The hydrolytic intrusion of water may also cause a self-healing effect, so that stresses can relax without disrupting the silane-film aided bonding. The reaction is reversible because silanes with silanol groups, ≡Si-OH, can uniquely compete with water on the substrate surface [3][4][5][6]. In the siloxane film, the reversible breaking and re-making of bonds, both of hydrogen bonds and of covalent bonds, occurs through stress deterioration.…”

“…For example, bis-1,2-(triethoxysilyl)ethane, which is a so-called bis-functional silane, possesses only hydrolyzable ethoxy groups attached to its two Si atoms. This cross-linking silane is often combined at a 1:5-1:10 ratio with a functional silane monomer [5,6]. The thickness of the cross-linked siloxane film that forms on the silica-coated substrate strongly depends on the silane concentration [3,4].…”

Promotion of Adhesion Between Resin and Silica-coated Titanium by Silane Monomers and Formic Acid Catalyst

“…Blends of bifunctional silane and cross-linking silane monomers have been reported to achieve considerable hydrolytic stability and to promote adhesion in applications of the tyre and steel manufacturing industries [7][8][9]. The most usual cross-linking silane is bis-1,2-(triethoxysilyl)ethane, which has six hydrolyzable ethoxy groups (Fig.…”

“…2). An interpenetrating polymer network is understood to form between the silanized substrate and organic coatings or resin-composites [3,[7][8][9][10][11].…”