Study on corrosion electrochemical behavior of several different coating systems by EIS

Liu, Xuwen; Xiong, Jinping; Lv, Yongwu; Zuo, Yu

doi:10.1016/j.porgcoat.2008.08.012

Cited by 322 publications

(128 citation statements)

References 12 publications

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“…When the electrolyte penetrated the coating, the dielectric constant of the coating changed and, consequently, CPE c took on other values. It is important to note that permeation of the electrolyte in the coating is also related to the porosity and thickness 4,23,24 . The equivalent circuit (Figure 8) was also adjusted for the electrolyte / base metal system considering R c and CPE c as the resistance and the non-ideal capacitance of the oxide layer formed during exposure to a NaCl solution.…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

“…Electrochemical parameters fitted from EIS measurement for the electrolyte/coating and electrolyte/base metal systems. some pores in the coating and prevent further diffusion of chloride ions along the interface 23,24 . By observing the CPE c , there is a tendency to reduce the capacitance of the coatings, reaching the lowest value for the 5 A dm -2 condition.…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

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Evaluation of Co-Ni/SiC Nanocomposite Coating Obtained by Electrodeposition on the Corrosion Resistance of API 5L X80 Steel

et al. 2017

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Co-Ni/SiC nanocomposite coatings were obtained by codeposition of SiC nanoparticles in a bath with nickel and cobalt, using API 5L X80 as the substrate. The influence of cathodic current density on deposit properties was investigated. Measurements of electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PP) were performed in 3.5 wt% NaCl solution to investigate a corrosion performance. The morphology and chemical analysis of the surfaces were analyzed by scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) and related with micro-hardness and X-ray diffraction (XRD). The results indicate which composite coatings have acicular morphology, with higher micro-hardness values than those found for the carbon steel substrate. The Co-Ni/SiC coating increased the corrosion potential and the resistance to polarization, which resulted in lower corrosion rates than those obtained without uncoated steel.

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Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Evaluation of Co-Ni/SiC Nanocomposite Coating Obtained by Electrodeposition on the Corrosion Resistance of API 5L X80 Steel

et al. 2017

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“…Zinc phosphate is a well-known pigment that shows anticorrosion properties by forming a protective layer when in contact with iron ions of mild steel. In addition the zinc phosphate composite films to act as a protective coating for mild steel are feasible and might be advantageous in the replacing of the conventional system of phosphatized layers on mild steel that was recognized by many researchers [5][6][7][8]. Besides, conversion treatments such as phosphatization and chromatization face restrictions due to their toxicity and due to environmental concerns.…”

Section: Introductionmentioning

confidence: 99%

“…Electrochemical impedance spectroscopy (EIS) has established itself as a primary method of evaluating the performance and degradation process of organic coating systems [10][11][12][13][14]. Its advantages over conventional DC techniques are well documented [5][6][7][8][9][10][11]. By analyzing the impedance spectra, some important parameters might be obtained such as coating resistance, coating capacitance, electrochemical reaction resistance, and double-layer capacitance, which provide the evaluation of the coating systems [15,16].…”

Section: Introductionmentioning

confidence: 99%

Chemical Degradation of Epoxy-Polyamide Primer by Electrochemical Impedance Spectroscopy

2012

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The degradation of organic-inorganic hybrid materials based on epoxy resin was characterized electrochemically in aggressive chemical electrolyte. In the present study, the hybrid material as primer was prepared from epoxy resin pigmented by zinc phosphate cured with polyamide (EPZ). The hybrid material was coated on mild steel substrate, and the corrosion behavior was studied by electrode-potential time measurements and mainly by electrochemical impedance spectroscopy (EIS) in 5% NaCl solution. The impedance parameters, namely, coating capacitance (C c ), pore resistance (R po ), charge transfer resistance (R t ), double layer capacitance (C d1 ), and break point frequency ( f b ), corresponding to 45• phase angle as a function of time of exposure were estimated. The observed impedance behavior were compared with the established equivalent electrical circuit represents the coated metal/electrolyte interface. Changes in the values of the circuit components given the information on the stages of degradation and physical phenomenon occurring throughout the degradation of primer coating were also been predicted. In addition, information related to the porous nature of the primer, limited passivation effect, and delamination of coating with longer exposure that resulted in the diffusion controlled corrosion of metal are also recognized. Thus, results indicate that the EPZ coating had good corrosion resistance. This could be a nonpolluting alternative to the traditional chromate like environmentally harmful coatings.

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“…Moreover, the coating deterioration may also occur as a result of electrolyte diffusion though coating porosities and defects. This would be responsible for the severe decrease in the coatings barrier properties (Liu et al, 2009 andRamezanzadeh et al, 2011). Therefore, different studies have been performed in order to find proper methods to improve the anticorrosion properties of the organic coatings.…”

mentioning

confidence: 99%

Enhancement of Corrosion Protection of UV Curable Coatings in the Presence of Aliphatic and Aromatic Amine Compounds

2015

Egypt. J. Rad.Sci.

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ORROSION inhibitors based on aromatic amine; 4-carboxy aniline (CA) and aliphatic amine; acrylamide (AA) were prepared. CA and AA amine compounds allowed reacting with epoxidized sunflower oil (ESO) at 130 o C for 3h to prepare amine adducts ESO/ CA and ESO/ AA, respectively. The adducts were characterized by IR-spectroscopy and oxirane content determination. Different ratio of prepared adduct were added in coating formulations based on epoxy acrylate oligomers to evaluate them as corrosion inhibitors on metal substrates under UV radiation. Corrosion resistance tests and wt loss values were measured for all cured films, in addition to the physical and mechanical measurements. It was found that the coating films containing CA have high resistance for corrosion of metal than AA and the optimum concentration is 0.5%.

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Study on corrosion electrochemical behavior of several different coating systems by EIS

Cited by 322 publications

References 12 publications

Evaluation of Co-Ni/SiC Nanocomposite Coating Obtained by Electrodeposition on the Corrosion Resistance of API 5L X80 Steel

Evaluation of Co-Ni/SiC Nanocomposite Coating Obtained by Electrodeposition on the Corrosion Resistance of API 5L X80 Steel

Chemical Degradation of Epoxy-Polyamide Primer by Electrochemical Impedance Spectroscopy

Enhancement of Corrosion Protection of UV Curable Coatings in the Presence of Aliphatic and Aromatic Amine Compounds

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