Advanced anti corrosive properties of poly(aniline-co-o-toluidine)/flyash composite coatings

Sambyal, Pradeep; Ruhi, Gazala; Bhandari, Hema; Dhawan, S. K.

doi:10.1016/j.surfcoat.2015.04.013

Cited by 44 publications

(17 citation statements)

References 40 publications

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“…Corrosion is one of the biggest problems for materials such as metals, alloys and composites because it causes pore formation and defects on the materials and decreases service life of the materials . Various types of filler like ZnO, TiO 2 , Al 2 O 3 , and organoclays have been used to limit corrosive species penetration to material surface .…”

Section: Resultsmentioning

confidence: 99%

Properties of polymer composites based on bisphenolAepoxy resins with original/modified steel slag

Guzel

Deveci

2016

Polymer Composites

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Recently, many inorganic solid wastes have accumulated as a byproduct in several industries and their storage is one of the major problems. Among these wastes, steel slag has attracted attention to utilize with different purposes. In this study, original steel slag (OS) and modified steel slag (MS) were evaluated as a filler to prepare low-cost epoxy composites. The effect of components on the properties of steel slag/ epoxy composites (SECs) was investigated with various analyses and tests. Physicomechanical and thermal properties of the SECs were compared with each other and neat epoxy resin (ER). Good dispersion of OS and MS in the ER matrix was determined with Xray diffraction (XRD) pattern and scanning electron microscopy (SEM). Tensile strength, Young modulus, and hardness values of the SECs were enhanced after modification of OS. Any change on adhesion and corrosion resistance of the SECs was not observed; however water sorption percent was increased with the addition of components. As per thermogravimetric analyses (TGA) and vicat softening temperature (VST) analyses, SECs cured with anhydride showed higher decomposition temperature than the other hardener.

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Section: Resultsmentioning

confidence: 99%

Properties of polymer composites based on bisphenolAepoxy resins with original/modified steel slag

Guzel

Deveci

2016

Polymer Composites

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“…However, shifting of absorption peaks toward higher wave number is noticed for the POCS. The shifting of peaks could be due to the presence of bulky methyl groups on the phenyl rings in the copolymer (presence of o‐toluidine in the copolymer) . The methyl groups alter the planarity of the polymeric chain and are assumed to be the main reason for the shifting of the peaks to higher wave numbers.…”

Section: Resultsmentioning

confidence: 99%

Conducting polymer/bio‐material composite coatings for corrosion protection

Sambyal¹,

Ruhi

Mishra

et al. 2017

Materials & Corrosion

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Present study demonstrates a facile in situ oxidative copolymerization method to synthesize conducting copolymer composites in aqueous chitosan medium. The development of poly(aniline‐co‐o‐toluidine)–chitosan–SiO2/epoxy composite coatings were carried out by thermal curing of the spray‐coated mild steel substrates. FT‐IR analysis, XRD studies, SEM and HR‐TEM evidenced that the composite has synergistically integrated properties of the copolymer and the SiO2 nanoparticles. The electrochemical analyses of the coatings in 3.5% NaCl solution manifest an efficient role of copolymer composite in the remarkable improvement of the corrosion resistance of the substrate. The analyses involve Tafel polarization and electrochemical impedance spectroscopy (EIS) studies. The corrosion inhibition property of conducting copolymers, the film forming ability of chitosan, and robustness of SiO2 nanoparticles kept the corrosion rate of the coatings significantly low, under highly corrosive conditions. Mild steel coated with 3.0% loading of copolymer composite coating demonstrated very low corrosion current density (icorr) and significantly high pore resistance (Rpore).

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“…The water‐holding capacity of FA was the best among the four filling materials, which may be because the particle size of FA is very small, with viscous texture and strong capillary action (Campbell, Fox, Aitken, & Bell, ; Salter & Williams, ). Moreover, FA is a fine cenosphere‐type powder with large surface area, and the SiO 2 and Al 2 O 3 in FA become hydrated with water (Chang, Lund, Page, & Warneke, ; Sambyal, Ruhi, Bhandari, & Dhawan, ); therefore, the water‐holding capacity of FA is the strongest. Under the same suction, the volumetric water content of the FA and CG mixture decreased compared with FA, which may be because the particle size and macropores increased with the addition of CG; moreover, the surface sorption capacity of CG to water is very small, which also reduced the water‐holding capacity (Ma et al ., ).…”

Section: Discussionmentioning

confidence: 99%

The effects of coal gangue and fly ash on the hydraulic properties and water content distribution in reconstructed soil profiles of coal‐mined land with a high groundwater table

Wang

Bai

et al. 2016

Hydrological Processes

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Soil water systems have been severely degraded in coal‐mined and subsiding land, where a shallow groundwater table is also present. The present paper discussed the effects of fly ash (FA) and coal gangue (CG) as filling materials on the hydraulic properties and water content distribution in a profile for the purpose of rehabilitating subsided lands. The saturated water content, water characteristic curve, and water diffusivity of local soil, FA, CG, and a mixture of FA and CG (“mixed filling”) were characterized. A column experiment was conducted to investigate the changes of water content in profiles reconstructed from the combination of soil and filling materials, including soil only, FA, CG, and a mixture of FA and CG, which were used to fill the lower part of the reconstructed profile. The mixture of FA and CG was found to possess similar hydraulic properties to those of the soil, particularly high water‐holding capacity and permeability. Moreover, the volumetric water contents in the whole profile containing the mixture of FA and CG were consistent with those of the profile reconstructed with soil only. As a result, it is recommended to adopt the mixture of FA and CG for reconstructing the lower profile of the land to alleviate or rehabilitate subsided land in coal mines.

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Advanced anti corrosive properties of poly(aniline-co-o-toluidine)/flyash composite coatings

Cited by 44 publications

References 40 publications

Properties of polymer composites based on bisphenolAepoxy resins with original/modified steel slag

Properties of polymer composites based on bisphenolAepoxy resins with original/modified steel slag

Conducting polymer/bio‐material composite coatings for corrosion protection

The effects of coal gangue and fly ash on the hydraulic properties and water content distribution in reconstructed soil profiles of coal‐mined land with a high groundwater table

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