Polyaniline inhibition of filiform corrosion on organic coated AA2024-T3

Williams, Geraint; McMurray, H. N.

doi:10.1016/j.electacta.2009.02.077

Cited by 52 publications

(18 citation statements)

References 40 publications

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“…[11][12][13] Several mechanisms underlying the protective behavior of PANI coatings have been proposed and reported, such as physical barrier protection, passivation protection, corrosion inhibition, electric eld effect, etc. 14,15 The passivation protection of steel by PANI has been reported to be the most efficient in which a thin oxide protective layer is formed as a result of electrochemical interaction between the polymer and metal surface. Wessling et al reported that the passive iron oxide layer was formed between PANI coatings and the metal surface aer immersed in 3 wt% NaCl solution, resulting in decrease of the corrosion current and increase of the corrosion potential revealed by Tafel polarization curve test.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically structured carbon nanotube–polyaniline nanobrushes for corrosion protection over a wide pH range

2017

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Carbon nanotube-polyaniline brush-like nanostructures have been successfully synthesized through in situ oxidative polymerization of aniline on the surface of carboxylated multi-walled carbon nanotubes. The diameter of the resultant tubular nanobrushes is dependent on the mass ratio of c-MWNTs to aniline.The as-designed carbon nanotube-polyaniline nanobrushes exhibit superior electroactivity not only in acidic, but also in neutral and alkaline environments. The excellent anticorrosion performance has been achieved by incorporation of these nanobrushes into amine cured epoxy modified acrylic resin. It is found that the good barrier property of the nanobrush coating against neutral and alkaline corrosion media penetration and its predominant passivation protection against acidic medium offer anticorrosion protection for steel over a wide pH range. The novel carbon nanotube-polyaniline nanobrushes prepared using this facile route extend the application of polyaniline to a wider range of pH environments and facilitate a more environmentally friendly and economical system than traditional heavy metal coatings and their oxide coatings, in the application of anticorrosion protection of metals.

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Section: Introductionmentioning

confidence: 99%

Hierarchically structured carbon nanotube–polyaniline nanobrushes for corrosion protection over a wide pH range

2017

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“…The Although GO/LDHs-VO x provides better corrosion inhibition properties in solution, the corrosion protection properties of M + M coating are better than those of the V + V coating. It is well-known that the filiform corrosion on organic-coated metal surfaces exhibits acidic conditions (pH~1) in the filament head as a consequence of cation hydrolysis [21,33,34]. Therefore, inhibitors working at acidic conditions should be added closer to the metal/coating interface.…”

Section: Eis Measurement Of Coating Systemsmentioning

confidence: 99%

Improvement of Corrosion Protection of Coating System via Inhibitor Response Order

Xi-nan

Xiong

et al. 2018

Coatings

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This study aims at investigating the effect of inhibitor response order on anticorrosion properties of AA2024 with coating system. The inhibitor response order was constructed by adding different inhibitor in sol-gel primer or epoxy top coating of the coating system. Nanocontainers of graphene oxide/layered double hydroxides (GO/LDHs) were loaded with 2-mercaptobenzothiazole (MBT) and vanadate separately to get the inhibitors of GO/LDHs-MBT and GO/LDHs-VOx, which were used in this work. The protection performances of the coating systems with different inhibitor combination and different inhibitor response order were investigated. The best protective coating system is composed of sol-gel coating with GO/LDHs-MBT and epoxy coating with GO/LDHs-VOx. It is contributed to inhibitor combination and a proper response order of the inhibitors. When filiform corrosion occurs, MBT anions from the sol-gel coating are close to the alloy and they inhibit the corrosion in anodic areas immediately, and then vanadate anions from the out and thick epoxy coating reduce the kinetics of the cathodic oxygen reduction reaction. Response order enhances the corrosion protection properties provided by inhibitor combination, which gives a promising way to design good anticorrosive coating system.

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“…Hydroxide species generated by oxygen reduction increase the pH of the interface and cations are transported from the defect electrolyte to the front of delamination for charge compensation [1][2][3][4][5][6]. To monitor this, the height regulated scanning Kelvin probe (SKP) has been established as an electrochemical method for a non-destructive analysis of electrode potentials [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

In situ study of the deterioration of thiazole/gold and thiazole/silver interfaces during interfacial ion transport processes

Santa

Posner

Grundmeier

2010

Journal of Electroanalytical Chemistry

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Polyaniline inhibition of filiform corrosion on organic coated AA2024-T3

Cited by 52 publications

References 40 publications

Hierarchically structured carbon nanotube–polyaniline nanobrushes for corrosion protection over a wide pH range

Hierarchically structured carbon nanotube–polyaniline nanobrushes for corrosion protection over a wide pH range

Improvement of Corrosion Protection of Coating System via Inhibitor Response Order

In situ study of the deterioration of thiazole/gold and thiazole/silver interfaces during interfacial ion transport processes

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