Corrosion protection of aluminum alloy (AA2219-T6) using sulfonic acid-doped conducting polymer coatings

Kanwal, Sehrish; Akhter, Zareen; Ali, Nazim; Hussain, Rizwan; Qamar, Samina

doi:10.1039/d2nj02219b

Cited by 9 publications

(4 citation statements)

References 47 publications

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“…The simple Randles model is inadequate for the coated substrates. Thus, there is a need to account for the heterogeneity of the protective coating and mass transfer processes producing time constant variations and other deviations. ,,,− The two electrochemical interphases that exist between the substrate surface and the electrolyte solution were accounted for by model B in Figure F. The charge transfer at the interphase between the metal and the coat is represented by R ct –(CPE dl -T ), while the coating interphase is accounted for by R c –(CPE c -T ).…”

Section: Resultsmentioning

confidence: 99%

Corrosion Protective Coatings from Poly(heterocyclic diphenylamine): Polyaniline Analogues

Awoyemi,

Almtiri,

Giri

et al. 2024

ACS Appl. Polym. Mater.

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This study explores conducting polymers with side chains containing long, branched alkyl groups as candidates for corrosion suppression coatings. These polymers, containing carbazole, phenothiazine, and phenoxazine cores, may be considered as analogues to polyaniline, which is often employed in corrosion control applications. The polymers are prepared from the corresponding dibrominated carbazole, phenothiazine, and phenoxazine monomers with 2,5-dimethyl-1,4-phenylenediamine by the Buchwald−Hartwig coupling reaction. The effectiveness of these coatings for corrosion suppression was tested by potentiodynamic polarization studies and electrochemical impedance spectroscopy. The morphology of the coatings was characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Corrosion testing of coated AISI 4130 steels in 3.5 wt % NaCl showed that the phenothiazine-and carbazole-containing polymers display excellent corrosion resistance. The protection efficiency (PE) of 95.9% for phenothiazine outperformed the other polymers, including polyaniline coating. SEM images indicate that the polymers are still uniformly coated with stable morphology after 24 h of exposure to corrosive media. These results suggest that phenothiazineand carbazole-based PANI analogues may be candidates for protective organic coatings in transportation, aviation, marine, and oil and gas industrial applications.

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Section: Resultsmentioning

confidence: 99%

Corrosion Protective Coatings from Poly(heterocyclic diphenylamine): Polyaniline Analogues

Awoyemi,

Almtiri,

Giri

et al. 2024

ACS Appl. Polym. Mater.

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“…Figure 2 illustrates 20 popular types of CPs used in sensors. CPs applications span a wide spectrum of uses, including rechargeable batteries [57], supercapacitors [58,59], electromagnetic shields [2], photocatalysts [60], anticorrosion coatings [61], and 3D printing technology [62,63]. CPs have played a significant role in advancing technology and enabling innovative solutions in these areas.…”

Section: Introductionmentioning

confidence: 99%

Advances in the Use of Conducting Polymers for Healthcare Monitoring

Le,

Yoon

2024

IJMS

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Conducting polymers (CPs) are an innovative class of materials recognized for their high flexibility and biocompatibility, making them an ideal choice for health monitoring applications that require flexibility. They are active in their design. Advances in fabrication technology allow the incorporation of CPs at various levels, by combining diverse CPs monomers with metal particles, 2D materials, carbon nanomaterials, and copolymers through the process of polymerization and mixing. This method produces materials with unique physicochemical properties and is highly customizable. In particular, the development of CPs with expanded surface area and high conductivity has significantly improved the performance of the sensors, providing high sensitivity and flexibility and expanding the range of available options. However, due to the morphological diversity of new materials and thus the variety of characteristics that can be synthesized by combining CPs and other types of functionalities, choosing the right combination for a sensor application is difficult but becomes important. This review focuses on classifying the role of CP and highlights recent advances in sensor design, especially in the field of healthcare monitoring. It also synthesizes the sensing mechanisms and evaluates the performance of CPs on electrochemical surfaces and in the sensor design. Furthermore, the applications that can be revolutionized by CPs will be discussed in detail.

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“…Acid‐doped polyaniline (PANi) and polypyrrole (PPy) were blended in epoxy matrices and coatings were applied on AA2219‐T6 to assess the passivation of the metal surface towards corrosion. In this study, polypyrrole and polyaniline were used as particle fillers in epoxy matrix enhance the corrosion protection on Al substrate sucessfully 18 …”

Section: Introductionmentioning

confidence: 99%

“…In this study, polypyrrole and polyaniline were used as particle fillers in epoxy matrix enhance the corrosion protection on Al substrate sucessfully. 18 In Vietnam, aluminum alloys are popular in daily using. It is so important to enhance the corrosion protection ability of aluminum substrate.…”

Section: Introductionmentioning

confidence: 99%

Properties and corrosion protection of polypyrrole prepared by electrochemical polymerization on aluminum

Khoe,

Hung,

Duc

et al. 2024

Vietnam Journal of Chemistry

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In a one‐step procedure that did not require any surface preparation, polypyrrole (PPy) films doped with 3‐nitrosalicylic acid (3Nisa) became effectively electropolymerized on the aluminum substrate in aqueous solutions. Fourier transform infrared, scanning electron microscopy, and thermal gravimetric analysis were used to analyze the properties of PPy‐based films. Open circuit potential (OCP), electrochemical impedance spectroscopy, Tafel polarization, and salt spray tests were used to study the corrosion‐resistant efficiency of the coatings. The as‐prepared PPy films performed corrosion resistance on aluminum in the 3% NaCl solution. However, the PPy films prepared in the 0.01 m solution of 3Nisa showed the best protection ability on aluminum. The self‐healing characteristic of the PPy films was recorded by varying the potential in the OCP measurement. The findings indicate the potential of using 3‐nitrosalicylic acid‐doped PPy films for applications as anti‐corrosion coatings for aluminum.

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Corrosion protection of aluminum alloy (AA2219-T6) using sulfonic acid-doped conducting polymer coatings

Abstract: In this paper, corrosion protection behaviour of epoxy blended sulfonate-doped polyaniline and polypyrrole coatings deposited on aluminum alloy AA2219-T6 substrate was studied by exposure to artificial seawater. Sulfonate doped-PANi and...

Cited by 9 publications

References 47 publications

Corrosion Protective Coatings from Poly(heterocyclic diphenylamine): Polyaniline Analogues

Corrosion Protective Coatings from Poly(heterocyclic diphenylamine): Polyaniline Analogues

Advances in the Use of Conducting Polymers for Healthcare Monitoring

Properties and corrosion protection of polypyrrole prepared by electrochemical polymerization on aluminum

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