Protection of mild steel by modification with thin films of polymethylthiophene

Rammelt, U.; Nguyen, Phuong Tuyen; Plieth, W.

doi:10.1016/s0013-4686(01)00688-0

Cited by 68 publications

(31 citation statements)

References 25 publications

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“…The corrosion rate of PVK-ZrO 2 coatings decreased with the increased protection efficiency of 98%. These results confirm that the PVK-ZrO 2 coating on 316 L SS act as a highly protective layer, which is attributed to the presence of ZrO 2 nanoparticles in polymer matrix based on the corrosion protection mechanism put forth by several researchers [44][45][46]. But when 3 wt.% ZrO 2 nano particles are added R p drastically decreases, which confirms the loading limit of the nano particles in the PVK matrix.…”

Section: Open Circuit Potential Measurementsupporting

confidence: 79%

Synthesis and Anticorrosive Properties of Novel PVK-ZrO<sub>2 </sub>Nano Composite Coatings on Steel-Substrate

Elangovan

Pugalmani

Arthanari

et al. 2018

e-J. Surf. Sci. Nanotech.

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A novel nanocomposite coating containing poly (N -vinyl carbazole) (PVK) and zirconia (ZrO2) nanoparticles was synthesized using chronoamperometry. The effect of ZrO2 nano particles into the PVK matrix and its mechanical, corrosion protection ability on 316L SS substrates were studied. The incorporation of the nanoparticles was endorsed by attenuated total reflectance infrared spectroscopy (ATR-IR) and EDAX analysis. The spheroidal morphology and core-shell structure were revealed with scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. The thermal studies exhibited the stability of coating. The anticorrosion performance of PVK-ZrO2 nanocomposite coatings in 3.5 weight (wt.)% NaCl medium was performed with potentiodynamic polarization technique and electrochemical impedance spectroscopy (EIS) studies. The corrosion rate of PVK-ZrO2 nanocomposite coated 316L SS was found to be 0.58 times lower than uncoated 316L SS and a significant decrease in corrosion potential was realized from −0.211 VSCE for uncoated 316L SS to 0.112 VSCE for PVK-ZrO2 nanocomposite coated 316L SS substrates. The results of this study clearly ascertain that the PVK-ZrO2 nanocomposite has an outstanding potential to protect 316L SS against corrosion in a 3.5 wt.% NaCl environment.

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Section: Open Circuit Potential Measurementsupporting

confidence: 79%

Synthesis and Anticorrosive Properties of Novel PVK-ZrO<sub>2 </sub>Nano Composite Coatings on Steel-Substrate

Elangovan

Pugalmani

Arthanari

et al. 2018

e-J. Surf. Sci. Nanotech.

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“…At this point, delamination at the metal/coating interface occurs and a barrier coating ceases to perform its protective function [2]. Sacrificial protection in the case of zinc rich primers requires a high pigment commonly used CPs for corrosion inhibition [17][18][19][20][21][22][23][24][25]. Amongst these, PPy seems to be promising due to its facile synthesis, good environmental stability, and high conductivity [26].…”

Section: Introductionmentioning

confidence: 99%

The effect of polymer morphology on the performance of a corrosion inhibiting polypyrrole/aluminum flake composite pigment

Jadhav

Vetter

Gelling

2013

Electrochimica Acta

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“…[1][2][3][4][5][6] Conducting polymeric films can impart active protection by exchanging electrons with the metallic substrate, generally pushing the corrosion potential into the passive region. This fact is not, however, sufficient for a successful protection.…”

mentioning

confidence: 99%

X-Ray Photoelectron Spectroscopy Study of the Composition of Polyphenol Films Formed on Pt by Electropolymerisation of Phenol in the Presence of Sulphide in Carbonate Medium

Lapuente

Quijada

Huerta

et al. 2003

Polym J

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ABSTRACT:The chemical composition and structure of polyphenol films formed electrochemically on Pt from bulk phenol in the absence and in the presence of solution sulphide were studied by XPS. The C1s (284.2-284.6 and 285.6-286 eV) and the O1s (533 eV) signals are consistent with a polymeric structure consisting of an aromatic carbon ring backbone linked by ether-like bonds and with hydroxyl groups. This structure is common to all the examined films formed under either potentiodynamic or potentiostatic conditions, even though the coatings formed in the presence of sulphide seemed to possess a higher ether-like oxygen content. Polyphenol films generated by cyclic voltammetry in the presence of sulphide contained a small amount of incorporated sulphur, with a characteristic binding energy of 162.3 eV which is essentially identical to that found for a sulphur layer deposited on Pt from sulphide in phenol-free solutions. The film is described as a S-polyphenol composite material, in which the S fraction is mainly incorporated at the early stages of filming. Sulphur-polyphenol composite coatings proved to possess more effective barrier properties than S-free polyphenol films.KEY WORDS Cyclic Voltammetry / X-Ray Photoelectron Spectroscopy / Sulphur / PPO / Corrosion Inhibition / Barrier Film / Protective coatings made of certain conducting or insulating polymeric films (or a blend of both) have proved to be effective against metallic corrosion. 1-6 Conducting polymeric films can impart active protection by exchanging electrons with the metallic substrate, generally pushing the corrosion potential into the passive region. This fact is not, however, sufficient for a successful protection. Tight adherence to the surface, high mechanical strength, film integrity and insolubility are mandatory requisites. Many insulating polymers meet these requirements and, provided they behave as strong physical barriers against corrosive electrolyte penetration, can effect satisfactory protection degrees. Despite their non-electroactive nature, thin insulating films can be formed onto metallic or semiconducting substrates by electropolymerisation from the bulk monomer, before dielectric properties manifest and the film growth is inhibited. Thus, the coating process can also benefit from the advantages of electrochemical methods, namely, simplicity, and flexibility of the experimental apparatus, efficient coating of not readily accesible areas and higher homogeneity of the films.Among insulating polymers, polyphenol films (also called polyoxyphenylene, poly(phenylene) oxide or PPO films) have received much attention. 1, 2, 7-20 These films were electropolymerised from phenol or phenol derivatives in a wide variety of electrolytic media, ranging from organic 9, 17 to hydroalcoholic 1, 2, 7, 10 to aqueous solutions 8,[12][13][14][15][16][18][19][20] at various pH. The role of several ring substituents was checked in order to increase the monomer solubility in the working electrolyte, to direct the oxidative coupling mechanism to desired ri...

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Protection of mild steel by modification with thin films of polymethylthiophene

Cited by 68 publications

References 25 publications

Synthesis and Anticorrosive Properties of Novel PVK-ZrO<sub>2 </sub>Nano Composite Coatings on Steel-Substrate

Synthesis and Anticorrosive Properties of Novel PVK-ZrO<sub>2 </sub>Nano Composite Coatings on Steel-Substrate

The effect of polymer morphology on the performance of a corrosion inhibiting polypyrrole/aluminum flake composite pigment

X-Ray Photoelectron Spectroscopy Study of the Composition of Polyphenol Films Formed on Pt by Electropolymerisation of Phenol in the Presence of Sulphide in Carbonate Medium

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