Influence of mixing ratio on the permeability of water and the corrosion performance of epoxy/amine coated un-pretreated Al-2024 evaluated by impedance spectroscopy

A Comprehensive Review on Water Diffusion in Polymers Focusing on the Polymer–Metal Interface Combination

“…where f θ max is the frequency corresponding to the maximal phase angle of impedance, θ max is the maximal phase angle of impedance, and Z imag is the imaginary part of the impedance at the maximal phase angle. In order to reduce the error induced by an electrochemical reaction at the interface, some scholars proposed replacing the metal with a non-metal material with characteristics of high impedance and densification, such as PE (polyethylene) [103,104]. However, a non-metal material added into the system would increase the system's resistance, which may result in the non-response of the test system with a regular test signal (e.g., 10 mV).…”

Electrochemical impedance spectroscopy (EIS): An efficiency method to monitor resin curing processes

“…It has been widely used as protective coatings, insulating materials, adhesives and casting materials owing to its superior properties, such as excellent chemical and corrosion resistance, strong adhesion, good mechanical properties, dielectric properties and lower cost [17][18][19][20][21]. Diglycidyl ether of bisphenol-A (DGEBA) is the most commercially available epoxy resin [22].…”

Thermal curing study of bisphenol A benzoxazine for barrier coating applications on 1050 aluminum alloy

“…Many studies concern the development of new technologies and alternatives aiming at avoiding the use of chromate: sol-gel coatings [7][8][9][10][11], new anodizing layers [12][13][14][15] and elaboration of organic-, inorganic-or hybrid coatings [16][17][18][19]. Epoxy resin coatings are generally used as organic coatings to prevent corrosion of aeronautic structures due to their good mechanical properties, strong adhesion, high crosslinking density and excellent chemical resistance [20,21]. However, this protective coating is known to be less efficient in aqueous environment.…”

“…However, this protective coating is known to be less efficient in aqueous environment. Water can migrate at the interface between the organic coating and the substrate and be at the origin of corrosion, blistering and delamination processes [20,21]. Furthermore, the release of by-products or the use of acid and base as catalyst are unattractive.…”