Chlorinated rubber paints for corrosion prevention of mild steel: A comparison between zinc phosphate and polyaniline pigments

Sakhri, A.; Perrin, F.X.; Aragon, E.; Lamouric, S.; Benaboura, Ahmed

doi:10.1016/j.corsci.2009.11.010

Cited by 76 publications

(36 citation statements)

References 41 publications

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“…However, these pigments should be eliminated from environment due to their severe toxicological properties [53]. Moreover, these corrosion inhibiting coatings onto steel object are not a complete solution because these coatings are subjected to scratches, cracks and chips which again expose the metal to the corrosive environment.…”

Section: Corrosion Protection Performance Of Pani-dbsa-h 2 Somentioning

confidence: 99%

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An impressive emulsion polymerization route for the synthesis of highly soluble and conducting polyaniline salts

et al. 2015

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Section: Corrosion Protection Performance Of Pani-dbsa-h 2 Somentioning

confidence: 99%

“…Various anti-corrosive pigments such as zinc phosphate, chromates and lead compounds can be used in paint systems to control corrosion [53]. However, these pigments should be eliminated from environment due to their severe toxicological properties [53].…”

Section: Corrosion Protection Performance Of Pani-dbsa-h 2 Somentioning

confidence: 99%

An impressive emulsion polymerization route for the synthesis of highly soluble and conducting polyaniline salts

et al. 2015

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“…Zinc phosphate (ZP), as a classical replacement of toxic chromate compounds has been widely used [4,6,7]. Different researches have focused on the anticorrosive role of ZP but the inhibitive mechanism of this pigment has not been well understood [8,9]. Most of the researchers reported that ZP has a weak inhibitive behavior which is related to its low solubility under neutral conditions.…”

Section: Introductionmentioning

confidence: 99%

“…This issue has led to the development of the second and third generations of ZP through modification of anionic part as well as cationic constituent. In this regard the aluminum zinc phosphate, iron zinc phosphate, zinc molybdenum phosphate, potassium zinc phosphate and sodium zinc phosphate were introduced a second generation [10,15e19]; and zinc tripolyphosphate and zinc aluminum polyphosphate as third generation [7,8]. Recently, the synthesis of a new generation of zinc phosphate has been considered by introducing an organic compound in the pigment composition [20,21,23].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of the fourth generation of zinc phosphate pigment in the presence of benzotriazole

et al. 2016

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“…8 Even though historically it had been assumed that conductivity is essential to the inhibition mechanism, recent work has shown that conductivity of pure PANI coatings and PANI containing coatings can be interrupted by sparse addition of small PANI particles without hurting corrosion inhibition efficiency. [9][10][11] Oligoanilines do not share certain drawbacks intrinsic to PANI coatings (e.g. catastrophic failure, poor solubility).…”

mentioning

confidence: 99%

Interactions of Different Redox States of Phenyl-Capped Aniline Tetramers with Iron Oxide Surfaces and Consequences for Corrosion Inhibition

Chowdhury

Mohtasebi

Kostina

et al. 2017

J. Electrochem. Soc.

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The phenyl capped aniline tetramer (PCAT) is known for its redox properties and is being studied for its ability to inhibit corrosion of iron and steel in addition to being of interest for sensors and molecular electronics. Here we investigate the interactions, orientation and corrosion inhibition ability of all three oxidation states of the free base form of PCAT with iron oxide surfaces. Raman spectroscopy demonstrates interconversion of these molecules to one another due to charge transfer to the surface. Polarized mid-IR spectroscopy and atomic force microscopy were used to elucidate the molecular orientations on the surface. Electrochemical impedance spectroscopy shows the corrosion resistance of fully reduced PCAT coatings on low carbon steel to be higher than that for half-oxidized and fully oxidized PCAT coatings. A weight loss test, laser line measurements and Raman spectroscopy reveal that even though half-oxidized PCAT initially shows a lower corrosion resistance due to transformation into the fully oxidized form, with time it transforms back into the half-oxidized form and protects the surface. Fully oxidized PCAT molecules show opposite behavior, causing the degradation of the surface over time. We thus attained a deeper insight into the interplay of the different oxidation states for corrosion control. Polyaniline (PANI) is a prominent member of the conducting polymer family because of its diverse application in biosensors, 1 electrochromic devices, 2 fuel cells, 3,4 etc. One of the most studied applications of this polymer is corrosion inhibition of metals. DeBerry showed in 1985 that PANI can inhibit corrosion of iron and steel by passivating the surface in acidic media. [5][6][7] Similarly to the native oxides, the passive oxides on iron or steel maintain a layered structure of a fully oxidized outer layer, followed by an intermediate mixed iron (II) and iron (III) oxide layer transitioning to a very thin inner iron (II) oxide layer next to the bulk metal. PANI is mainly found in three different stable oxidation states (fully reduced or leucoemeraldine, half-oxidized or emeraldine, and fully oxidized or pernigraniline) and several protonation states. The complete mechanism behind the corrosion inhibition ability of this polymer is still unclear due to its complex chemistry. PANI coatings can break down catastrophically, which is the reason why their commercialization has failed. Recent work demonstrated that this breakdown happens due to a high conductivity and long-range electronic interactions.8 Even though historically it had been assumed that conductivity is essential to the inhibition mechanism, recent work has shown that conductivity of pure PANI coatings and PANI containing coatings can be interrupted by sparse addition of small PANI particles without hurting corrosion inhibition efficiency.9-11 Oligoanilines do not share certain drawbacks intrinsic to PANI coatings (e.g. catastrophic failure, poor solubility). Very little work has been done on oligoanilines, which have related physical a...

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Chlorinated rubber paints for corrosion prevention of mild steel: A comparison between zinc phosphate and polyaniline pigments

Cited by 76 publications

References 41 publications

An impressive emulsion polymerization route for the synthesis of highly soluble and conducting polyaniline salts

An impressive emulsion polymerization route for the synthesis of highly soluble and conducting polyaniline salts

Synthesis and characterization of the fourth generation of zinc phosphate pigment in the presence of benzotriazole

Interactions of Different Redox States of Phenyl-Capped Aniline Tetramers with Iron Oxide Surfaces and Consequences for Corrosion Inhibition

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