Influence of zinc molybdenum phosphate pigment on coatings performance studied by electrochemical methods

Puig, Manuel Martí; Gimeno, María José Pena; Izquierdo, R.; Gracenea, J.J.; Suay, J.

doi:10.1016/j.porgcoat.2016.04.029

Cited by 13 publications

(12 citation statements)

References 33 publications

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“…However, in order to provide faster indication of corrosion processes at the surface and at the interface of coated metallic substrates, Hollaender et al [24] implemented the classical EIS method combining cathodic polarization stress (direct current: DC) and EIS measurement (alternating current: AC) in order to accelerate the degradation of the coating system. A further development based on the Hollaender method [24,25] is the accelerated cyclic electrochemical technique (ACET), which comprises a potential relaxation step following each cathodic polarization step to allow the formation of a new stable equilibrium (i.e.…”

Section: Introductionmentioning

confidence: 99%

Smart Anticorrosion Coatings Based on Poly(phenylene methylene): An Assessment of the Intrinsic Self-Healing Behavior of the Copolymer

et al. 2022

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Poly(phenylene methylene) (PPM) is a multifunctional polymer featuring hydrophobicity, high thermal stability, fluorescence and thermoplastic processability. Accordingly, smart corrosion resistant PPM-based coatings (blend and copolymer) were prepared and applied by hot pressing on aluminum alloy AA2024. The corrosion protection properties of the coatings and their dependence on coating thickness were evaluated for both strategies employed. The accelerated cyclic electrochemical technique (ACET), based on a combination of electrochemical impedance spectroscopy (EIS), cathodic polarizations and relaxation steps, was used as the main investigating technique. At the coating thickness of about 50 µm, both blend and copolymer PPM showed effective corrosion protection, as reflected by |Z|0.01Hz of about 108 Ω cm2 over all the ACET cycles. In contrast, when the coating thickness was reduced to 30 µm, PPM copolymer showed neatly better corrosion resistance than blended PPM, maintaining |Z|0.01Hz above 108 Ω cm2 with respect to values below 106 Ω cm2 of the latter. Furthermore, the analysis of many electrochemical key features, in combination with the optical investigation of the coating surface under 254 nm UV light, confirms the intrinsic self-healing ability of the coatings made by PPM copolymer, contrary to the reference specimen (i.e., blend PPM).

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Section: Introductionmentioning

confidence: 99%

Smart Anticorrosion Coatings Based on Poly(phenylene methylene): An Assessment of the Intrinsic Self-Healing Behavior of the Copolymer

et al. 2022

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“…Giving the software values of Y0 in unit Mho, together with a parameter know as n [30]. Where Y0 represents the admittance magnitude of the CPE, w is radius frequency (w = 2f), j is imaginary number (√−1), n is empirical constant [31].…”

Section: Equivalent Electrical Circuit (Ec)mentioning

confidence: 99%

“…Qcoat and Rcoat are related to the coating, which can be characterized at high frequency [35][36][37], Qcoat should be a measure of solution permeation into the coating [30,38]. Y0 and n values contribute to Qcoat.…”

Section: Equivalent Electrical Circuit (Ec)mentioning

confidence: 99%

Improving corrosion resistance of 3D printed Ti-6Al-4V by TiN coating

et al. 2021

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TiN thin films were deposited on biomaterial 3D printed Ti-6Al-4V substrates using two methods including direct current magnetron sputtering (DCMS) and high-power impulse magnetron sputtering (HiPIMS). The coating times were compared between 5 min and 25 min. HiPIMS was developed based on DCMS by increasing degree of ionization in plasma and power densities in the order of kWcm-2 compared to Wcm-2 of DCMS. The film characteristics and mechanical properties were investigated by glancing incident x-ray diffractometer (GIXRD), field emission scanning electron microscope (FE-SEM), and atomic force microscope (AFM). Electrochemical behavior was analyzed by electrochemical impedance spectroscopy (EIS) in 1 M NaCl solution. The results showed that TiN films deposited by HiPIMS exhibited an equiaxed structure while those from DCMS had a columnar structure. As a consequence, corrosion resistance of HiPIMS films was better than the DCMS films. Furthermore, increasing coating time resulted in thicker TiN layer and therefore, promoted higher corrosion resistance.

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“…Over the years, many studies have been performed on the modifi cation of already available pigments. It may be the introduction of other elements, particle size reduction or the replacement of phosphate anion with the others [11][12][13][14][15][16][17][18][19][20][21] .…”

Section: Introductionmentioning

confidence: 99%

Anticorrosive and physicochemical properties of modified phosphate pigments

Przywecka

Grzmil

Kowalczyk

2019

Polish Journal of Chemical Technology

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Many studies have been carried out in the direction of improvement of the effectiveness of commonly utilized phosphate corrosion inhibitors. For this purpose various types of modifications are realized, e.g. introduction of different cations to the pigment composition or replacement of phosphate anions with others. In the presented work, anticorrosive pigments containing calcium hydrogen phosphate, and/or calcium hydroxyphosphate, and calcium molybdate were obtained. The phase and chemical composition and the oil absorption number of those materials were determined. The anticorrosive properties were investigated by an electrochemical noise method. The obtained results were compared with previously published studies concerning pigments containing (NH4)3Al2(PO4)3 and/or AlPO4, and CaMoO4. It was found that the pigment containing only calcium molybdate(VI) is not an effective corrosion inhibitor. However, the pigments comprising a mixture of CaHPO4 and CaMoO4 exhibited good anticorrosive properties and they were characterized by higher effectiveness in the corrosion protection than compared materials.

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Influence of zinc molybdenum phosphate pigment on coatings performance studied by electrochemical methods

Cited by 13 publications

References 33 publications

Smart Anticorrosion Coatings Based on Poly(phenylene methylene): An Assessment of the Intrinsic Self-Healing Behavior of the Copolymer

Smart Anticorrosion Coatings Based on Poly(phenylene methylene): An Assessment of the Intrinsic Self-Healing Behavior of the Copolymer

Improving corrosion resistance of 3D printed Ti-6Al-4V by TiN coating

Anticorrosive and physicochemical properties of modified phosphate pigments

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