Finite element analysis of the water diffusion behaviour in pigmented epoxy coatings under alternating hydrostatic pressure

Li, Rui; Liu, Li; Meng, Fanning; Tian, Wenliang; Liu, Ying; Wang, Fuhui

doi:10.1016/j.porgcoat.2018.07.011

Cited by 19 publications

(4 citation statements)

References 36 publications

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“…This demonstrates that the water diffusion in the coating conforms to the Fick diffusion law during the testing period of 240 h [44,45]. Both the cyclic cathodic polarization and the high hydrostatic pressure can promote the penetration of corrosive media such as water into the hard-to-diffuse area of the coating, thus increasing the water absorption of the coating [62]. It has been reported in the literature that high hydrostatic pressure can increase the diffusion coefficient of water in the epoxy coating with glass flake-filled [44,45].…”

Section: Testing Conditions Fitting Parameters 1 H 24 H 72 H 120 H 19...supporting

confidence: 55%

Influence of AC-DC-AC Cycling with Hydrostatic Pressure on Accelerated Protective Performance Test of Glass Flake Epoxy Coating

Shen,

Xu,

Liu

et al. 2023

Coatings

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To achieve fast testing of the barrier properties of organic coatings, immersion tests, AC-DC-AC tests, and coupled tests of AC-DC-AC with hydrostatic pressure were conducted in seawater for a glass flake epoxy coating. Electrochemical impedance spectroscopy (EIS) was used to characterize the degradation processes of the coating during the tests, and the surface of the coating was analyzed using an optical microscope, scanning electron microscope (SEM), and a Fourier transform infrared spectrometer (FTIR). The results showed that periodic cathodic polarization coupled with high hydrostatic pressure can accelerate the degradation of a coating by facilitating the diffusion and uptake of electrolyte and the delamination of the coating. The coupled test method has the largest acceleration due to the synergetic effect of AC-DC-AC and hydrostatic pressure.

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Section: Testing Conditions Fitting Parameters 1 H 24 H 72 H 120 H 19...supporting

confidence: 55%

Influence of AC-DC-AC Cycling with Hydrostatic Pressure on Accelerated Protective Performance Test of Glass Flake Epoxy Coating

Shen,

Xu,

Liu

et al. 2023

Coatings

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“…Among these methods, the surface treatment method using organic coating protection emerges as the most practical, convenient and cost-effective option (Vazirinasab et al, 2018). To improve the protective performance of organic coatings, functional fillers are commonly added, as stated by the authors (Liu et al, 2018;Cui et al, 2019a;Funke, 1997).…”

Section: Introductionmentioning

confidence: 99%

“…, 2018). To improve the protective performance of organic coatings, functional fillers are commonly added, as stated by the authors (Liu et al. , 2018; Cui et al.…”

Section: Introductionmentioning

confidence: 99%

Recent progress of self-healing polyaniline organic composite coatings: active agents, methods and protection mechanism

Liu,

Shao

et al. 2024

ACMM

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Purpose Polyaniline (PANI) has garnered attention for its potential applications in anticorrosion fields because of its unique properties. Satisfactory outcomes have been achieved when using PANI as a functional filler in organic coatings. More recently, research has extensively explored PANI-based organic coatings with self-healing properties. The purpose of this paper is to provide a summary of the active agents, methods and mechanisms involved in the self-healing of organic coatings. Design/methodology/approach This study uses specific doped acids and metal corrosion inhibitors as active and self-healing agents to modify PANI using the methods of oxidation polymerization, template synthesis, nanosheet carrier and nanocontainer loading methods. The anticorrosion performance of the coatings is evaluated using EIS, LEIS and salt spray tests. Findings Specific doped acids and metal corrosion inhibitors are used as active agents to modify PANI and confer self-healing properties to the coatings. The coatings’ active protection mechanism encompasses PANI’s own passivation ability, the adsorption of active agents and the creation of insoluble compounds or complexes. Originality/value This paper summarizes the active agents used to modify PANI, the procedures used for modification and the self-healing mechanism of the composite coatings. It also proposes future directions for developing PANI organic coatings with self-healing capabilities. The summaries and proposals presented may facilitate large-scale production of the PANI organic coatings, which exhibit outstanding anticorrosion competence and self-healing properties.

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“…Thus, it has been commonly used as an anti-corrosion coating in both industrial and daily-life applications [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. Since the network structure of epoxy resin is inevitably penetrated by corrosive media, it is necessary to add various inert pigments to further improve the shielding performance of the coating, such as basalt, iron oxide, glass flakes, and so on [ 8 , 9 , 10 , 11 , 12 ]. Mica is one of the most widely used inorganic fillers in this coating [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Modification of Mica by High-Temperature Mechanochemistry on the Anticorrosion Performance of Epoxy Coatings

et al. 2021

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Epoxy resin was directly grafted onto the surface of mica powder by high-temperature mechanical ball milling. This method was used to achieve a chemical reaction between the epoxy resin and mica that cannot be carried out under conventional circumstances. The results show that an epoxy resin layer with a thickness of approximately 10 nm formed on the surface of the mica. This modified mica filler exhibited a significant change in its hydrophilic properties. The dispersion of mica and its compatibility with organic coatings also significantly improved. In addition, the modified mica filler was added to the epoxy coating. The improvement of the coating’s compactness and toughness is the reason for its anti-corrosion performance enhancement.

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Finite element analysis of the water diffusion behaviour in pigmented epoxy coatings under alternating hydrostatic pressure

Cited by 19 publications

References 36 publications

Influence of AC-DC-AC Cycling with Hydrostatic Pressure on Accelerated Protective Performance Test of Glass Flake Epoxy Coating

Influence of AC-DC-AC Cycling with Hydrostatic Pressure on Accelerated Protective Performance Test of Glass Flake Epoxy Coating

Recent progress of self-healing polyaniline organic composite coatings: active agents, methods and protection mechanism

The Effect of the Modification of Mica by High-Temperature Mechanochemistry on the Anticorrosion Performance of Epoxy Coatings

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