A Mechanistic Study of Corrosion of Graphene and Low zinc- rich Epoxy Coatings on Carbon Steel in Salt Environment

Sheng-rong, Wang

doi:10.20964/2019.07.17

Cited by 16 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For corrosion performance prediction, an accelerated laboratory test in salt spray chamber was performed [1,13,23]. According to ISO 9227 [24], the temperature in the salt chamber was 35 ± 2 • C, the compressed air pressure was 0.7-1.4 bar, and the concentration of NaCl solution was 5%.…”

Section: Methodsmentioning

confidence: 99%

“…The protective properties of the coating systems with and without zinc in the primer were evaluated by electrochemical impedance spectroscopy [5,13], with a VersaSTAT 3 Potentiostat/Galvanostat (AMETEK Scientific 131 Instruments, Princeton applied research, Berwyn, PA, USA). The measurements were carried out after 24, 250, and 500 h of immersion in 3% NaCl solution at room temperature (23 ± 2) • C. The impedance spectra were performed at open circuit potential with a 100 mV RMS sinusoidal amplitude, using 10 points.…”

Section: Methodsmentioning

confidence: 99%

“…A Zn-rich coating has protective mechanisms which can efficiently prevent a mild steel substrate from corrosion. Zinc provides great cathodic protection and, with the 2 of 16 formation of nonconductive corrosion products of zinc, provides dominating barrier protection [13,14]. The corrosion performance of epoxy coatings can be evaluated with various methods.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Performance Assessment of Differently Dried Coating Systems for Potential Application in the Power Transformer Industry

et al. 2022

View full text Add to dashboard Cite

Many companies in the power transformer industry are striving to speed up the drying process of coatings, which is why alternative drying methods are constantly being explored while maintaining the same coating protection properties. The infrared (IR) drying of protective coatings is a potential solution for their higher productivity, but has not yet been extensively investigated. In this paper, two solvent-borne coating systems, with and without zinc in the primer, from two different manufacturers, dried by infrared radiation and under atmospheric conditions, were studied. The coating systems consisted of epoxy primer, epoxy intermediate coat, and polyurethane topcoat. Anti-corrosion performance of the coatings was characterized using a salt spray chamber, pull-off adhesion testing, electrochemical impedance spectroscopy (EIS) investigation, and open circuit potential (OCP) measurement. All samples were analyzed using stereo microscope. A scanning electron microscope (SEM) with energy-dispersive X-ray spectroscopy (EDX) for detailed study and chemical composition determination was used. The results showed that infrared technology notably reduced coating drying times while maintaining or improving anticorrosion performance properties compared to the coatings dried under atmospheric conditions.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance Assessment of Differently Dried Coating Systems for Potential Application in the Power Transformer Industry

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In the equivalent electric circuit of the coating system, R s represents the solution resistance, Q c is the coating capacitance, R c is the coating resistance towards the ionic species or reactants passing through the coating, Q dl is a constant phase element representing the double-layer capacitance and R t is the electron migration resistance [92]. In the Bode plot, the impedance modulus |Z| at low frequency (∼0.1 Hz) is associated with R c , which can be therefore easily determined [92,93]. Figure 5(e) shows the Nyquist plots measured for pristine PIB-and h-BN/PIB composite-coated structural steel.…”

Section: Anticorrosion Performance Of H-bn/pib Compositesmentioning

confidence: 99%

Wet-jet milling exfoliated hexagonal boron nitride as industrial anticorrosive pigment for polymeric coatings

et al. 2023

View full text Add to dashboard Cite

The incorporation of inorganic nanofillers into polymeric matrices represents an effective strategy for the development of smart coatings for corrosion protection of metallic substrates. In this work, wet-jet milling (WJM) exfoliation was used to massively produce few-layer hexagonal boron nitride (h-BN) flakes as corrosion-protection pigment in polyisobutylene (PIB)-based composite coatings for marine applications. This approach represents an innovative advance in the application of two-dimensional (2D) material-based composites as corrosion protection systems at the industrial scale. Although rarely used as an organic coating, PIB was selected as a ground-breaking polymeric matrix for our h-BN-based composite coating thanks to its excellent barrier properties. The optimization of the coating indicates that 5 wt.% is the most effective h-BN content, yielding a corrosion rate of the protected structural steel as low as 7.4 × 10-6 mm year-1. The 2D morphology and hydrophobicity of the h-BN flakes, together with the capability of PIB to act as a moisture barrier, are the main reasons behind the excellent anticorrosion performance of our composite coating.

show abstract

“…This defect is particularly evident in the study of ZRC impedance spectra, despite the relative simplicity of the ZRC impedance spectra. There are usually two types of equivalent circuits for the ZRC impedance spectra: (1) the nested equivalent circuit (Figure 1), which is also the usual equivalent circuit for shielding coatings [6][7][8][9]. Most scholars use this equivalent circuit.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of two equivalent circuit models for electrochemical impedance spectroscopy analysis of epoxy zinc-rich coatings

Xie,

Wang,

Xie

et al. 2023

Corrosion Engineering, Science and Technology: The Internationa

View full text Add to dashboard Cite

In this paper, the impedance spectra of an epoxy zinc-rich coating (ZRC) and its free film immersed in 3.5% NaCl solution are investigated, the fitting error and model parameter trends of series and nested equivalent circuit fits are compared, and the differences in the high-frequency components of the ZRC and the epoxy coatings are analyzed. The results show that the high-frequency impedance of ZRC is the contact impedance between the zinc powders (Z m ) rather than the film impedance (Z f ). The corrosion reaction of the ZRCs is controlled by the diffusion of oxygen. For ZRCs, the series equivalent circuits are more reasonable compared to the nested equivalent circuit. Based on the series equivalent circuit, the variation law of the equivalent circuit elements (resistors, capacitors and dispersion coefficient) and the correlation of these elements with low-frequency impedance modulus (|Z| 0.01Hz ) and open circuit potential (OCP) are investigated in this paper.

show abstract

A Mechanistic Study of Corrosion of Graphene and Low zinc- rich Epoxy Coatings on Carbon Steel in Salt Environment

Cited by 16 publications

References 29 publications

Performance Assessment of Differently Dried Coating Systems for Potential Application in the Power Transformer Industry

Performance Assessment of Differently Dried Coating Systems for Potential Application in the Power Transformer Industry

Wet-jet milling exfoliated hexagonal boron nitride as industrial anticorrosive pigment for polymeric coatings

Comparative study of two equivalent circuit models for electrochemical impedance spectroscopy analysis of epoxy zinc-rich coatings

Contact Info

Product

Resources

About