Molybdate as corrosion inhibitor for hot dip galvanised steel scribed to the substrate: A study based on global and localised electrochemical approaches

Coelho, Leonardo Bertolucci; Fava, E.B; Kooijman, Agnieszka; González-García, Yaiza; Olivier, Marie‐Georges

doi:10.1016/j.corsci.2020.108893

Cited by 26 publications

(11 citation statements)

References 51 publications

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“…11,12 Constant phase elements of coating ( Q c ) and constant phase elements of double layer ( Q dl ) were utilized instead of ideal capacitors because of the inhomogeneous property of steel coating. 7 Table 2 presents the fitting EIS parameters by the equivalent circuit at an immersion time of 72 h. The total impedance values Z 1 and Z 2 of ZMO and ZMO/ h -BN can be calculated using eqn (2) and (3): 45 ω = 2π f ,where Y , ω and n represent admittance, alternating current voltage angular frequency, and dispersion index, respectively. 46…”

Section: Resultsmentioning

confidence: 99%

“…The lowest I corr belonged to ZMO/h-BN/EP coating, indicating that the corrosion resistance of the steel substrate was enhanced by the synergistic effect of ZMO and h-BN. The C R (corrosion rate), R p (polarization resistance), and η (corrosion inhibition rate) were determined using eqn ( 5), ( 6) and (7), respectively. 48 This demonstrates that the polarization resistance (R p ) of ZMO/ h-BN/EP coating (14.97 Ω cm 2 ) increased by 49.40% and 130.31% more than ZMO/EP and blank EP coatings, exhibiting better shielding performance.…”

Section: Anticorrosion Performancementioning

confidence: 99%

“…3 Recently, molybdate has been widely researched in carbon steel anticorrosion 4,5 in terms of environmental friendliness, high thermal stability and low toxicity. 6,7 However, the high cost of using molybdate as an anticorrosive material restricts its extensive applications. 8 Thus, researchers have started to compound molybdates with other inorganic and organic anticorrosive materials to overcome costs and improve system performance.…”

Section: Introductionmentioning

confidence: 99%

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Design and enhanced anticorrosion performance of a Zn₅Mo₂O₁₁·5H₂O/h-BN nanocomposite with labyrinth of nanopores

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Section: Anticorrosion Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and enhanced anticorrosion performance of a Zn₅Mo₂O₁₁·5H₂O/h-BN nanocomposite with labyrinth of nanopores

et al. 2023

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“…Coelho et al [93] deliberated on corrosion opposition of hot-dipped galvanized steel in 0.05 M NaCl. Efficacy of Na 2 MoO 4 was estimated on HDG substrate, mechanically scratched material.…”

Section: Corrosion Inhibition Studies Of Galvanized Steelmentioning

confidence: 99%

An Up-to-Date Review on Industrially Significant Inhibitors for Corrosion Control of Zinc

Pais

Rao

2021

J Bio Tribo Corros

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Zinc, an important nonferrous metal, is the fourth most used metal in the world. It has innumerable uses in industrial as well as in other segments. The primary utility of zinc is in galvanization and as an anode in the battery. Steel coated with zinc, which is known as galvanized steel, is widely used in industries. Even though zinc protects many metals from undergoing corrosion, by itself, it undergoes corrosion in several acidic, alkaline, and neutral environments. The corrosion behavior of zinc is significant in all industries where it is utilized either directly or indirectly in the form of a sacrificial coating. In-depth analysis of the reported literature indicated that corrosion attenuation of zinc in acidic and alkaline medium was studied by many researchers, and various classes of inhibitors were tried under varying experimental conditions. Most inhibitors can be amalgamated as excellent inhibitors with an inhibition efficiency of 80–90%. Even though this is a subject of intense research, systematic documentation on the same is not available in the literature. This review consolidates research work on corrosion and inhibition studies of zinc and galvanized steel over a period of three decades.

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“…There are numerous works, which show that substances of inorganic and organic nature can act as inhibitory agents: chromates, nitrites, vanadates, molybdates, natural gums, amines, quinolines, imidazole and pyridine derivatives, phthalocyanines, biopolymers/hydrocarbon polymers, etc. [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. Among them, substances from the azole group (1,2,4-triazole, benzotriazole, etc.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Smart PEO-Coatings Impregnated with Corrosion Inhibitors on the Protective Properties of AlMg3 Aluminum Alloy

et al. 2023

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The protective coating with a self-organized microtubular structure was formed using plasma electrolytic oxidation (PEO) on AlMg3 aluminum alloy in the tartrate-fluoride electrolyte. This protective layer was further modified using corrosion inhibitors of the azole group (1,2,4-triazole, benzotriazole) and polymer material (polyvinilidene fluoride, PVDF). X-ray diffraction analysis and scanning electron microscopy with energy dispersive spectroscopy were used to study the morphology and composition of the obtained oxide coatings. The presence of the inhibitor in the PEO-layer was confirmed using micro-Raman spectroscopy and X-ray photoelectron spectroscopy. The level of corrosion protection of formed coatings as well as the effect of loaded inhibitors on the anticorrosion efficiency was evaluated using electrochemical impedance spectroscopy (EIS) and localized scanning techniques (SVET/SIET). The coating impregnation with corrosion inhibitors of the azole group significantly improves the corrosion characteristics of the material. Impregnation of the base PEO-layer with 1,2,4-triazole during 24 h results in a 36 times increase in the impedance modulus measured at the lowest frequency (|Z|f=0.1Hz). Additional sealing of impregnated coating with polymer improves the corrosion stability of the treated material. On the base of the obtained data, the optimal way of protective inhibitor- and polymer-containing formation using surface treatment was suggested. The best barrier properties were established for hybrid coatings obtained by the immersion of a PEO-coated sample in 1,2,4-triazole solution for 24 h and following spraying the PVDF solution. The value of |Z|f=0.1Hz for this protective layer increased by more than two orders of magnitude in comparison with the base PEO-layer. The three-stage mechanism of corrosion inhibition of the sample with smart inhibitor-containing coating was established.

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Molybdate as corrosion inhibitor for hot dip galvanised steel scribed to the substrate: A study based on global and localised electrochemical approaches

Cited by 26 publications

References 51 publications

Design and enhanced anticorrosion performance of a Zn₅Mo₂O₁₁·5H₂O/h-BN nanocomposite with labyrinth of nanopores

Design and enhanced anticorrosion performance of a Zn₅Mo₂O₁₁·5H₂O/h-BN nanocomposite with labyrinth of nanopores

An Up-to-Date Review on Industrially Significant Inhibitors for Corrosion Control of Zinc

The Effect of Smart PEO-Coatings Impregnated with Corrosion Inhibitors on the Protective Properties of AlMg3 Aluminum Alloy

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Molybdate as corrosion inhibitor for hot dip galvanised steel scribed to the substrate: A study based on global and localised electrochemical approaches

Cited by 26 publications

References 51 publications

Design and enhanced anticorrosion performance of a Zn5Mo2O11·5H2O/h-BN nanocomposite with labyrinth of nanopores

Design and enhanced anticorrosion performance of a Zn5Mo2O11·5H2O/h-BN nanocomposite with labyrinth of nanopores

An Up-to-Date Review on Industrially Significant Inhibitors for Corrosion Control of Zinc

The Effect of Smart PEO-Coatings Impregnated with Corrosion Inhibitors on the Protective Properties of AlMg3 Aluminum Alloy

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Product

Resources

About

Design and enhanced anticorrosion performance of a Zn₅Mo₂O₁₁·5H₂O/h-BN nanocomposite with labyrinth of nanopores

Design and enhanced anticorrosion performance of a Zn₅Mo₂O₁₁·5H₂O/h-BN nanocomposite with labyrinth of nanopores