Nanostructured Epoxy-Based Anticorrosive Coatings

Abstract

A functionalized epoxy resin (DGEBA) was synthesized from abietic acid, through the esterification and condensation reactions between the carboxyl groups of abietic acid and the basic functional groups of an epoxy resin. This method of synthesis increases the epoxy resin surface adhesion, as well as the chemical and thermal stability, for being used as a protective coating against corrosion of copper plates. Characterization analyses included FTIR and SEM of both raw and functionalized epoxy resin substrates performed. The corrosion performance of these coatings when applied onto Cu and stainless plates was tested in terms of: (i) immersion in a misty saline chamber, under accelerated corrosive conditions; (ii) Taber abrasion and (iii) hardness, adhesion and potentiodynamic polarization. The obtained results indicate the existence of a chemical bond between the epoxy ring and the carboxyl functional groups of abietic acid. This chemical bonding provided an increased adhesion as well as better chemical and thermal stabilities than those of the original resin. The corrosion resistance lining the functionalized epoxy resin films indicated that their anticorrosive efficiency was up to 30% higher than that of the functionalized resin.

Recent Advances in the Development of Nanocarbon-Based Electrocatalytic/Electrode Materials for Proton Exchange Membrane Fuel Cells: A Review

“…In order to improve the physical and chemical properties of graphene materials, they are modified with various additives. Both heteroatoms, such as S [111], N [40,[112][113][114], P [115,116], F [117], and various compounds, such as tin oxides [118,119], silicon oxides [120], and others [121], can serve as doping materials. These additives are introduced into the graphite structure by various chemical and physical methods and act as In order to improve the physical and chemical properties of graphene materials, they are modified with various additives.…”

“…These additives are introduced into the graphite structure by various chemical and physical methods and act as In order to improve the physical and chemical properties of graphene materials, they are modified with various additives. Both heteroatoms, such as S [111], N [40,[112][113][114], P [115,116], F [117], and various compounds, such as tin oxides [118,119], silicon oxides [120], and others [121], can serve as doping materials. These additives are introduced into the graphite structure by various chemical and physical methods and act as functional groups.…”

Effect of SiO2 concentration on the mechanical and anticorrosive properties of the hybrid PMMA/SiO2 coating synthesized in situ by sol-gel process.

“…Extensive research has been conducted on polymeric matrices where ceramic particles are embedded [16] [17] [18]. By combining the flexibility and strength of polymers with the hardness and corrosion resistance of ceramics, it becomes possible to have all these properties in a single coating layer [14][16] [19]. We present the synthesis with the inclusion of silica particles by an in-situ reaction; with the aim to create a truly hybrid-structured material that can diminish the number of layers used in the anticorrosive systems, that are usually multilayered, which would be able to combine the anticorrosive properties of PMMA and silica particles.…”

Reinforcement of Aminopropyl-Terminated Siloxane-Treated Carbon Nanotubes in Epoxy Thermosets: Mechanical and Thermal Properties

“…The invention and application of epoxy resins have brought great convenience to people's lives [1]. Epoxy resins are widely used in industry for various applications, such as adhesives [2][3][4], coatings [5,6], packaging [7,8], and other structural materials [9][10][11]. The epoxy resins have a higher degree of crosslinks, thus showing thermosetting properties; for instance, higher degrees of rigidness and better strength and dimensional stability.…”