The Role of Zinc Phosphate Pigment in the Anticorrosion Properties of Bisphenol A Diglycidyl Ether-Polyaminoamide Coating for Aluminum Alloy AA2024-T3

DGEBA‐polyaminoamide as effective anti‐corrosive material for 15CDV6 steel in NaCl medium: Computational and experimental studies

“…Results presented in Table showed that the higher impedance modulus (|Z| 100mHz ) value corresponding to the DGEBA‐polyaminoamide coating begin at 8.9 kΩ.cm 2 after 1 h immersion in a 3 wt % NaCl solution. The value of |Z| 100mHz for DGEBA‐polyaminoamide decreased by about 1.4 kΩ.cm 2 after the exposure and being immersed in 3 wt % NaCl for 1 h. The decrease in the impedance values with time clearly indicate that electrolytes disperses into the coating and reduces the barrier properties of the polymeric film …”

“…EDS elemental maps were collected on this same instrument with an accelerated voltage of 20 keV and observed by ZEISS Scope A 1 microscopy. The surface morphology was tested before and after 4362 h exposure to accelerated environment . The immerged metallic specimen was taken out after 4362 h, washed with double deionized water, dried under hot air blower, and examined for SEM‐EDS surface analysis.…”

“…The value of |Z| 100mHz for DGEBA-polyaminoamide decreased by about 1.4 kΩ.cm 2 after the exposure and being immersed in 3 wt % NaCl for 1 h. The decrease in the impedance values with time clearly indicate that electrolytes disperses into the coating and reduces the barrier properties of the polymeric film. 28 Moreover, the electrical equivalent circuit was used to fit and simulate DGEBA-polyaminoamide coating impedance data as shown in Figure 2. The electrochemical circuit was utilized in order to obtain solution resistance, coating resistance, charge transfer resistance, coating capacitance and double layer indicated as R s , R coat , R ct , C coat , and C dl capacitance, respectively.…”

Highly durable macromolecular epoxy resin as anticorrosive coating material for carbon steel in 3% NaCl: Computational supported experimental studies

“…Use of polymer coatings is one of the most effective and economic methods of corrosion protection . Coatings are widely used as anticorrosive technique of high durability and respecting the sustainable development on metal supports in a lot of engineering applications for example in automotive, aeronautics, ships, architecture, and oil tanks . Anticorrosive polymer coatings are now developed in the context of current environmental standards, but the question of their durability remains unresolved.…”

“…Epoxy‐polymer are the furthermost imperative polymeric supplies to remain used as anticorrosive coating since of their low shrinkage, simplicity of curing and extraordinary resistance to moistness, solvents and chemicals and their brilliant linkage enactment. Apart from the above, epoxy coatings are also associated with perfunctory properties, better‐quality adhesion to the substrate, good thermal immovability, excellent corrosion resistance, and chemical resistance . The attractive properties could be attributed to the high cross linking density and functional groups such as the amines and hydroxyls present in the epoxy coating.…”